EPA-EAD: 1625: Semivolatiles - Base/Neutrals, Acid Extractable, GC/MS

Summary
Analytes
Revision
Data and Sites

Official Method Name

Semivolatile Organic Compounds by Isotope Dilution GCMS

Current Revision

40 CFR Part 136, Appendix A (Current Edition)

Media

WATER

Instrumentation

Gas Chromatography with Mass Spectrometry Detection

Method Subcategory

Organic

Method Source

EPA-EAD

Citation

EPA Method Guidance CD-ROM (includes MCAWW Methods, and most current EPA Methods)

Brief Method Summary

Stable isotopically labeled analogs of the compounds of interest are added to a 1-L wastewater sample. The sample is extracted at pH 12-13, then at pH <2 with methylene chloride using continuous extraction techniques. The extract is dried over sodium sulfate and concentrated to a volume of 1 mL. An internal standard is added to the extract and the extract is injected into the GC. The compounds are separated by GS and detected by MS. The labeled compounds serve to correct the variability of the analytical technique.

Scope and Application

This method is designed to determine the semivolatile toxic organic pollutants associated with the 1976 Consent Decree and additional compounds amenable to extraction and analysis by capillary column gas chromatography-mass spectrometry (GC/MS).

Applicable Concentration Range

Varies with analyte.

Interferences

(A) Artifacts: Solvents, reagents, glassware, and other sample processing hardware may yield artifacts and/or elevated baselines causing misinterpretation of chromatograms and spectra. Use of pure or purified reagents and solvent rinsed and baked glassware can minimize potential for artifacts.
(2) Matrix: Interferences coextracted from samples will vary considerably from source to source, depending on the diversity of the industrial complex or municipality being sampled.

Quality Control Requirements

The minimum QC requirements consist of an initial demonstration of laboratory capability, analysis of samples spiked with labeled compounds to evaluate data quality, and analysis of standards and blanks as tests of continued performance. Laboratory performance is compared against established criteria.

Sample Handling

Collect samples in glass containers. If chlorine is present, preserve with 80 mg sodium thiosulfate per liter of sample. Keep containers at 4^oC during sampling and storage.

Maximum Holding Time

7 days (sample prior to extraction); 40 days (extract)

Relative Cost

Greater than $400

Sample Preparation Methods

This method has 177 analytes associated with it.

Analyte	Detection Level	Bias	Precision	Spiking Level
1,2,3,4-Tetrachlorobenzene(634-66-2) 1,2,3,4-Tetrachlorobenzene Benzene, 1,2,3,4-tetrachloro-	N/A	N/A	N/A
1,2,3,5-Tetrachlorobenzene(634-90-2) 1,2,3,5-Tetrachlorobenzene Benzene, 1,2,3,5-tetrachloro-	N/A	N/A	N/A
1,2,3-Trichlorobenzene(87-61-6) 1,2,3-Trichlorobenzene Benzene, 1,2,3-trichloro-	10.000 ug/L	N/A	N/A
1,2,3-Trimethoxybenzene(634-36-6) 1,2,3-Trimethoxybenzene Benzene, 1,2,3-trimethoxy- Pyrogallol trimethyl ether Tri-O-methylpyrogallol	20.000 ug/L	N/A	N/A
1,2,4,5-Tetrachlorobenzene(95-94-3) 1,2,4,5-Tetrachlorobenzene Benzene, 1,2,4,5-tetrachloro-	N/A	N/A	N/A
1,2,4-Trichlorobenzene(120-82-1) 1,2,4-Trichlorobenzene 1,2,5-Trichlorobenzene 1,3,4-Trichlorobenzene Benzene, 1,2,4-trichloro- TCB Trichlorobenzene, 1,2,4- unsym-Trichlorobenzene	10.000 ug/L	106% Rec (ML)	8.80 % RSD (ML)	100.00 ug/L
1,2-Dichlorobenzene(95-50-1) 1,2-Dichlorobenzene Benzene, 1,2-dichloro- Dilantin db Dowtherm e o-Dichlorobenzene ortho-Dichlorobenzene	10.000 ug/L	104% Rec (ML)	11.40 % RSD (ML)	100.00 ug/L
1,2-Diphenylhydrazine(122-66-7) 1,2-Diphenylhydrazine Hydrazine, 1,2-diphenyl Hydrazobenzene n,n'-Bianiline	20.000 ug/L	128% Rec (ML)	34.00 % RSD (ML)	100.00 ug/L
1,3,5-Trithiane(291-21-4) 1,3,5-Trithiane	N/A	N/A	N/A
1,3-Dichloro-2-propanol(96-23-1) 1,3-Dichloro-2-propanol 1,3-Dichloropropanol 2-Propanol, 1,3-dichloro-	N/A	N/A	N/A
1,3-Dichlorobenzene(541-73-1) 1,3-Dichlorobenzene Benzene, 1,3-dichloro- Benzene, m-dichloro- m-Dichlorobenzene	10.000 ug/L	115% Rec (ML)	20.70 % RSD (ML)	100.00 ug/L
1,3-Dinitrobenzene(99-65-0) 1,3-Dinitrobenzene 1,3-Dinitrobenzol 2,4-Dinitrobenzene 2,6-Dinitrobenzene Benzene, 1,3-dinitro- Binitrobenzene DNB m-Dinitrobenzene	N/A	N/A	N/A
1,4-Dichlorobenzene(106-46-7) 1,4-Dichlorobenzene Benzene, 1,4-dichloro- Chlorinated benzenes, mono- and di- Di-chloricide PDB Paramoth p-Dichlorobenzene para-dichlorobenzene	10.000 ug/L	119% Rec (ML)	21.60 % RSD (ML)	100.00 ug/L
1,4-Dinitrobenzene(100-25-4) 1,4-Dinitrobenzene Benzene, 1,4-dinitro- p-Dinitrobenzene	N/A	N/A	N/A
1,4-Naphthoquinone(130-15-4) .alpha.-Naphthoquinone 1,4-Dihydro-1,4-diketonaphthalene 1,4-Naphthalenedione 1,4-Naphthoquinone Dihydro-1,4-diketonaphthalene,1,4-	N/A	N/A	N/A
1,5-Naphthalenediamine(2243-62-1) 1,5-Naphalenediamine 1,5-Naphthalenediamine	N/A	N/A	N/A
1-Methyl-9H-fluorene(1730-37-6) 1-Methyl-9H-fluorene 1-Methylfluorene 9H-Fluorene, 1-methyl-	N/A	N/A	N/A
1-Methylphenanthrene(832-69-9) 1-Methylphenanthrene Phenanthrene, 1-methyl-	N/A	N/A	N/A
1-Phenylnaphthalene(605-02-7) 1-Phenylnaphthalene Naphthalene, 1-phenyl-	N/A	N/A	N/A
2,3,6-Trichlorophenol(933-75-5) 2,3,6-Trichlorophenol Phenol, 2,3,6-trichloro-	10.000 ug/L	N/A	N/A
2,3-Benzofluorene(243-17-4) 11H-Benzo[b]fluorene 2,3-Benzofluorene	N/A	N/A	N/A
2,3-Dichloroaniline(608-27-5) 2,3-Dichloroaniline Benzenamine, 2,3-dichloro-	N/A	N/A	N/A
2,3-Dichloronitrobenzene(3209-22-1) 2,3-Dichloronitrobenzene Benzene, 1,2-dichloro-3-nitro-	N/A	N/A	N/A
2,4,5-Trichlorophenol(95-95-4) 2,4,5-Trichlorophenol Dowicide 2 Phenol, 2,4,5-trichloro-	10.000 ug/L	N/A	N/A
2,4,5-Trimethylaniline(137-17-7) 2,4,5-Trimethylaniline Aniline, 2,4,5-trimethyl- Benzenamine, 2,4,5-trimethyl-	N/A	N/A	N/A
2,4,6-Trichlorophenol(88-06-2) 2,4,6-Trichlorophenol Dowicide 2S Phenachlor Phenol, 2,4,6-trichloro-	10.000 ug/L	N/A	N/A
2,4-Diaminotoluene(95-80-7) 1,3-Benzenediamine, 4-methyl- 1,3-diamino-4-Methylbenzene 2,4-Diaminotoluene 2,4-Toluenediamine 2,4-diamino-1-Methylbenzene 4-methyl-m-Phenylenediamine Toluene, 2,4-diamino-	N/A	N/A	N/A
2,4-Dichlorophenol(120-83-2) 1,3-dichloro-4-Hydroxybenzene 2,4-Dichlorophenol DCP Dichlorophenol, 2,4- Phenol, 2,4-dichloro-	10.000 ug/L	N/A	N/A
2,4-Dimethylphenol(105-67-9) 2,4-Cimethylphenol 2,4-Dimethylphenol 2,4-Xylenol 4,6-Dimethylbenzene Bacticin Dimethylbenzene,1-hydroxy-2,4- Dimethylbenzene,4-hydroxy-1,3- Dimethylphenol, 2,4- Phenol, 2,4-dimethyl-	10.000 ug/L	98% Rec (ML)	14.00 % RSD (ML)	100.00 ug/L
2,4-Dinitrophenol(51-28-5) .alpha.-Dinitrophenol 2,4-Dinitrophenol 2,4-Dnp Aldifen Dinitrobenzene,1-hydroxy-2,4- Fenoxyl carbon n Phenol, 2,4-dinitro	50.000 ug/L	N/A	N/A
2,4-Dinitrotoluene(121-14-2) 1-Methyl-2,4-dinitrobenzene 2,4-DNT 2,4-Dinitrotoluene 2,4-Dinitrotoluol Benzene, 1-methyl-2,4-dinitro Benzene,2-methyl-2,4-dinitro- Dinitrobenzene,1-methyl-2,4- Dinitrotoluene, 2,4 Methyl-2,4-dinitrobenzene,1- Toluene, 2,4-dinitro-	10.000 ug/L	109% Rec (ML)	11.20 % RSD (ML)	100.00 ug/L
2,6-Dinitrotoluene(606-20-2) 2,6-DNT 2,6-Dinitrotoluene Benzene, 2-methyl-1,3-dinitro- Benzene,1-methyl-2,6-dinitro- Dinitrobenzene,1-methyl-2,6-	10.000 ug/L	106% Rec (ML)	11.00 % RSD (ML)	100.00 ug/L
2,6-di-tert-Butyl-p-benzoquinone(719-22-2) 2,5-Cyclohexadiene-1,4-dione, 2,6-bis(1,1- ... 2,6-Di-t-butyl-p-benzoquinone 2,6-di(t-Butyl)benzoquinone 2,6-di-tert-Butyl-p-benzoquinone 2,6-di-tert-butyl-1,4-benzoquinone	N/A	N/A	N/A
2-(Methylthio)benzothiazole(615-22-5) 2-(Methylthio)benzothiazole Benzothiazole, 2-(methylthio)-	N/A	N/A	N/A
2-Bromochlorobenzene(694-80-4) 1-Bromo-2-chlorobenzene 2-Bromochlorobenzene Benzene, 1-bromo-2-chloro-	N/A	N/A	N/A
2-Chloronaphthalene(91-58-7) 2-Chloronaphthalene Halowax Naphthalene, 2-chloro- beta-Chloronaphthalene	10.000 ug/L	133% Rec (ML)	36.90 % RSD (ML)	100.00 ug/L
2-Chlorophenol(95-57-8) 2-Chlorophenol Phenol, 2-chloro- Phenol, o-chloro- o-Chlorophenol	10.000 ug/L	N/A	N/A
2-Isopropylnaphthalene(2027-17-0) 2-(1-Methylethyl) naphthalene 2-Isopropylnaphthalene Naphthalene, 2-(1-methylethyl)-	N/A	N/A	N/A
2-Methyl-4,6-dinitrophenol(534-52-1) 2,4-Dinitro-6-methyl-phenol 2,4-Dinitro-o-cresol 2-Methyl-4,6-dinitrophenol 4,6-Dinitro-o-cresol DNOC Dinitrocresol Methyl-4,6-dinitrophenol,2- Phenol, 2-methyl-4,6-dinitro-	20.000 ug/L	N/A	N/A
2-Methylbenzothiazole(120-75-2) 2-Methybenzothiazole 2-Methylbenzothiazole Benzothiazole, 2-methyl-	N/A	N/A	N/A
2-Methylnaphthalene(91-57-6) 2-Methylnaphthalene Naphthalene, 2-methyl beta-Methylnaphthalene	N/A	N/A	N/A
2-Nitroaniline(88-74-4) 1-Amino-2-nitrobenzene 2-Nitroaniline Aniline, 2-nitro- Aniline, o-nitro- Benzenamine, 2-nitro o-Nitraniline o-Nitroaniline	N/A	N/A	N/A
2-Nitrophenol(88-75-5) 2-Hydroxynitrobenzene 2-Nitrophenol Phenol, 2-nitro- Phenol, o-nitro- o-Hydroxynitrobenzene o-Nitrophenol	20.000 ug/L	N/A	N/A
2-Phenylnaphthalene(612-94-2) 2-Phenylnaphthalene Naphthalene, 2-phenyl-	N/A	N/A	N/A
3,3'-Dichlorobenzidine(91-94-1) 1,1'-Biphenyl-4,4'-diamine, 3,3'-dichloro- 3,3'-Dichloro-4,4'-diaminobiphenyl 3,3'-Dichlorobenzidine Diamino-3,3'-dichlorobiphenyl,4,4'- o,o'-Dichlorobenzidine	50.000 ug/L	110% Rec (ML)	15.80 % RSD (ML)	100.00 ug/L
3,3'-Dimethoxybenzidine(119-90-4) (1,1'-Biphenyl)-4,4'-diamine, 3,3'-dimethoxy 3,3'-Dimethoxybenzidine Dianisidine Dimethoxy-(1,1'-biphenyl)-4,4'-diamine,3,3'- Dimethoxy-4,4'-diaminobiphenyl,3,3'-	N/A	N/A	N/A
3,6-Dimethylphenanthrene(1576-67-6) 3,6-Dimethylphenanthrene Phenanthrene, 3,6-dimethyl-	N/A	N/A	N/A
3-Bromochlorobenzene(108-37-2) 1-Bromo-3-chlorobenzene 3-Bromochlorobenzene Benzene, 1-bromo-3-chloro-	N/A	N/A	N/A
3-Chloronitrobenzene(121-73-3) 1-Chloro-3-nitrobenzene 3-Chloronitrobenzene Benzene, 1-chloro-3-nitro- M-Nitrochlorobenzene	N/A	N/A	N/A
3-Methylcholanthrene(56-49-5) 1,2-dihydro-3-methyl-Benz(j)aceanthrylene 3-Methylcholanthrene Benz[j]aceanthrylene, 1,2-dihydro-3-methyl-	N/A	N/A	N/A
3-Nitroaniline(99-09-2) 1-Amino-3-nitrobenzene 3-Nitroaniline 3-Nitrobenzenamine Aniline, 3-nitro- Benzenamine, 3-nitro m-Nitraniline m-Nitroaniline	N/A	N/A	N/A
4,4'-Methylenebis(2-chloroaniline)(101-14-4) 4,4'-Methylenebis (2-chloroaniline) 4,4'-Methylenebis(2-chloroaniline) 4,4'-Methylenebis(2-chlorobenzenamine) Benzenamine, 4,4'-methylenebis[2chloro- Benzeneamine, 4,4'-methylenebis[2-chloro- Di(4-amino-3-chlorophenyl)methane Diamino-3,3'-dichlorodiphenylmethane,4,4'- Dichloro-4,4'-diaminodiphenylmethane,3,3'- MOCA MOCA, MBOCA Methylenebis(o-chloroaniline) Moca- 4,4-methylenebis-2-chloroaniline	N/A	N/A	N/A
4-Aminobiphenyl(92-67-1) 4-Aminobiphenyl 4-Biphenylamine Amine,(1,1'-biphenyl)-4- Xenylamine [1,1'-Biphenyl]-4-amine p-Aminobiphenyl p-Aminodiphenyl p-Biphenylamine p-Phenylaniline	N/A	N/A	N/A
4-Bromophenyl phenyl ether(101-55-3) 1-Bromo-4-phenoxybenzene 4-Bromodiphenylether 4-Bromophenyl phenyl ether Benzene, 1-bromo-4-phenoxy- Bromophenyl, 4-phenyl ether Phenyl-4-bromophenyl ether p-Bromodiphenyl ether p-Bromophenyl phenyl ether	10.000 ug/L	82% Rec (ML)	21.10 % RSD (ML)	100.00 ug/L
4-Chloro-2-nitroaniline(89-63-4) 4-Chloro-2-nitroaniline Benzenamine, 4-chloro-2-nitro-	N/A	N/A	N/A
4-Chloro-3-methylphenol(59-50-7) 3-Methyl-4-chlorophenol 4-Chloro-1-hydroxy-3-methylbenzene 4-Chloro-3-cresol 4-Chloro-3-hydroxytoluene 4-Chloro-3-methylphenol 4-Chloro-m-cresol Chlorophenol, 4-, methyl, 3- Parachlorometacresol Phenol, 4-chloro-3-methyl- p-Chloro-m-cresol	10.000 ug/L	N/A	N/A
4-Chlorophenylphenyl ether(7005-72-3) 1-Chloro-4-phenoxybenzene 4-Chlorodiphenyl ether 4-Chlorophenyl ether 4-Chlorophenylphenyl ether Benzene, 1-chloro-4-phenoxy Chlorophenyl, 4-phenyl ether Monochlorodiphenyl oxide p-Chlorophenyl phenyl ether	10.000 ug/L	113% Rec (ML)	17.50 % RSD (ML)	100.00 ug/L
4-Nitrobiphenyl(92-93-3) 1,1'-Biphenyl, 4-nitro- 4-Nitrobiphenyl 4-Nitrodiphneyl 4-Phenyl-nitrobenzene Biphenyl, 4-nitro Biphenyl,4-nitro-1,1'- p-Nitrobiphenyl	N/A	N/A	N/A
4-Nitrophenol(100-02-7) 1-hydroxy-4-Nitrobenzene 4-Hydroxynitrobenzene 4-Nitrophenol Phenol, 4-nitro- p-Hydroxynitrobenzene p-Nitrophenol	50.000 ug/L	N/A	N/A
4H-Cyclopenta[def]phenanthrene(203-64-5) 4,5-Methylenephenanthrene 4H-Cyclopenta[def]phenanthrene Benzo[def]fluorene Phenanthrene, 4,5-methylene	N/A	N/A	N/A
5-Chloro-o-toluidine(95-79-4) 5-Chloro-2-methylaniline 5-Chloro-o-toluidine Benzenamine, 5-chloro-2-methyl- o-Toluidine, 5-chloro-	N/A	N/A	N/A
5-Nitro-o-toluidine(99-55-8) 2-Amino-4-nitrotoluene 2-Methyl-5-nitroaniline 2-Methyl-5-nitrobenzenamine 5-Nitro-o-toluidine Benzenamine, 2-methyl-5-nitro- C.I. 37105 Scarlet G Base	N/A	N/A	N/A
7,12-Dimethylbenz(a)anthracene(57-97-6) 1,2-Benzanthracene, 7,12-dimethyl- 7,12-DMBA 7,12-Dimethyl-1,2-Benzanthracene 7,12-Dimethylbenz(a)anthracene 7,2-Dimethylbenz(a)anthracene Benz[a]anthracene, 7,12-dimethyl- DMBA Dimethyl-1,2-benzanthracene,9,10- Dimethyl-2,3-benzphenanthrene,1,4- Dimethylbenzanthracene Dimethylbenzanthrene	N/A	N/A	N/A
Acenaphthene(83-32-9) 1,2-Dihydroacenaphthylene 1,8-Ethylenenaphthalene Acenaphthene Acenaphthene,1,2-dihydro- Acenaphthylene, 1,2-dihydro- Periethylenenaphthalene	10.000 ug/L	103% Rec (ML)	10.20 % RSD (ML)	100.00 ug/L
Acenaphthylene(208-96-8) Acenaphthalene Acenaphthylene Cyclopenta(de)naphthalene	10.000 ug/L	115% Rec (ML)	18.50 % RSD (ML)	100.00 ug/L
Acetophenone(98-86-2) 1-Phenylethanone Acetophenone Acetylbenzene Benzoyl methide Ethanone, 1-phenyl- Hypnone Methylphenyl ketone Phenylmethyl ketone	N/A	N/A	N/A
Aniline(62-53-3) Aminobenzene Aminophen Aniline Aniline oil Benzenamine Blue oil Kyanol Phenylamine	N/A	N/A	N/A
Anthracene(120-12-7) Anthracene Anthracin Green oil Paranaphthalene Tetra olive n2g	10.000 ug/L	102% Rec (ML)	21.00 % RSD (ML)	100.00 ug/L
Aramite(140-57-8) 2-(4-tert-Butylphenoxy)isopropyl-2-chloroethyl sulfite Aramite Aramite (R) Aratron Niagaramite Ortho-mite Sulfurous acid, 2-chloroethyl-, 2-[4-(1,1-dime	N/A	N/A	N/A
Benz[a]anthracene(56-55-3) 1,2-Benzanthracene 2,3-Benzphenanthrene Benz[a]anthracene Benzanthrene Benzo(a)anthracene Benzoanthracene Naphthanthracene Tetraphene	10.000 ug/L	106% Rec (ML)	14.70 % RSD (ML)	100.00 ug/L
Benzanthrone(82-05-3) 7H-Benz[de]anthracen-7-one Benzanthrone	N/A	N/A	N/A
Benzenethiol(108-98-5) Benzenethiol Benzenethiolnyl chloride Mercaptobenzene Phenyl mercaptan Thiophenol	N/A	N/A	N/A
Benzidine(92-87-5) (1,1'-Biphenyl)-4,4'-diamine 4,4'-Diaminobiphenyl Benzidine Biphenyl)-4,4'-diamine,(1,1'- [1,1'-Biphenyl]-4,4'-diamine [hydrochloride] p,p'-Bianiline p-Diaminodiphenyl	50.000 ug/L	101% Rec (ML)	59.60 % RSD (ML)	100.00 ug/L
Benzo(a)pyrene(50-32-8) 3,4-Benzopyrene 3,4-Benzpyrene BP BaP Benzo(a)pyrene Benzo[a]pyrene	10.000 ug/L	112% Rec (ML)	19.10 % RSD (ML)	100.00 ug/L
Benzo(b)fluoranthene(205-99-2) 2,3-Benzofluoranthene 3,4-Benzfluoranthene 3,4-Benzofluoranthene B(b)F Benz[e]acephenanthrylene Benzo(b)fluoranthene Benzo(e)fluoranthene Benzo[b]fluoranthene	10.000 ug/L	142% Rec (ML)	54.60 % RSD (ML)	100.00 ug/L
Benzo(g,h,i)perylene(191-24-2) 1,12-Benzoperylene 1,12-Benzperylene B(ghi)P Benzo(g,h,i)perylene Benzo(ghi)perylene	20.000 ug/L	108% Rec (ML)	12.80 % RSD (ML)	100.00 ug/L
Benzo(k)fluoranthene(207-08-9) 11,12-Benzofluoranthene B(k)F Benz(k)fluoranthene Benzo(k)fluoranthene	10.000 ug/L	92% Rec (ML)	15.20 % RSD (ML)	100.00 ug/L
Benzyl alcohol(100-51-6) Benzene carbinol Benzenemethanol Benzoyl alcohol Benzyl alcohol Phenol carbinol Phenyl carbinol Phenylmethanol Phenylmethyl alcohol alpha-Hydroxytoluene	N/A	N/A	N/A
Biphenyl(92-52-4) 1,1'-Biphenyl Bibenzene Biphenyl Diphenyl Phenylbenzene	10.000 ug/L	105% Rec (ML)	13.20 % RSD (ML)	100.00 ug/L
Butyl benzyl phthalate(85-68-7) 1,2-Benzenedicarboxylic acid, butyl phenylmeth 1,2-Benzenedicarboxylic acid, butyl phenylmethyl ester BBP Benzenedicarboxylic acid,1,2-, butyl phenylmethyl ester Benzyl butyl phthalate Benzyl butyl phthalate--1,2-Benzenedicarboxylic acid ... Benzyl-N-butyl phthalate Butyl benzyl phthalate N-Butyl benzyl phthalate Phthalic acid, benzyl butyl ester Phthalic acid, butylbenzylester	N/A	N/A	N/A
Carbazole(86-74-8) 9H-Carbazole Carbazole Dibenzopyrrole	20.000 ug/L	N/A	N/A
Chrysene(218-01-9) 1,2,5,6-Dibenzonaphthalene 1,2-Benzophenanthrene 1,2-Benzphenanthrene Benz(a)phenanthrene Benzo(a)phenanthrene Chrysene	10.000 ug/L	106% Rec (ML)	23.80 % RSD (ML)	100.00 ug/L
Crotoxyphos(7700-17-6) 2-Butenoic acid, 3-[(dimethoxyphosphinyl)oxy]-, 1- ... Ciodrin Coidrin Crotonic acid, 3-hydroxy, alpha-methylbenzyl e Crotonic acid, 3-hydroxy, alpha-methylbenzyl ester, ... Crotoxyphos Dimethyl-cis-1-methyl-2-(1-phenylethoxycarbonyl) ...	N/A	N/A	N/A
DBCP(96-12-8) 1,2-Dibromo-3-chloropropane Chloro-1,2-dibromopropane,3- DBCP Dibromochloropropane Fumagon, Fumazone Nemabrom, Nemafume, Nemagon, Nematocide Nemagon Nematocide Propane, 1,2-dibromo-3-chloro-	N/A	N/A	N/A
Di-n-butyl phthalate(84-74-2) 1,2-Benzenedicarboxylic acid, dibutyl ester Benzenedicarboxylic acid,1,2-, dibutyl ester DBP Di-n-butyl phthalate Dibutyl phthalate Phthalic acid, dibutyl ester	10.000 ug/L	113% Rec (ML)	11.70 % RSD (ML)	100.00 ug/L
Di-n-octyl phthalate(117-84-0) 1,2-Benzenedicarboxylic acid, dioctyl ester Benzenedicarboxylic acid,1,2-, dioctyl ester Benzenedicarboxylic acid,o-, dioctyl ester Di-n-octyl phthalate Dioctyl phthalate Dioctyl-o-benzenedicarboxylate Dioctyl-o-phthalate n-Dioctylphthalate	10.000 ug/L	112% Rec (ML)	12.50 % RSD (ML)	100.00 ug/L
Dibenzo(a,h)anthracene(53-70-3) 1,2:5,6-Dibenzanthracene DB(a,h)A Dibenz(a,h)anthracene Dibenzo(a,h)anthracene	20.000 ug/L	N/A	N/A
Dibenzofuran(132-64-9) Dibenzofuran Dibenzofurans Diphenylene oxides	10.000 ug/L	108% Rec (ML)	9.00 % RSD (ML)	100.00 ug/L
Dibenzothiophene(132-65-0) Dibenzo(b,d)thiophene Dibenzothiophene Diphenylene sulfide	10.000 ug/L	109% Rec (ML)	12.90 % RSD (ML)	100.00 ug/L
Dichloran(99-30-9) 2,6-Dichloro-4-nitroaniline 2,6-Dichloro-4-nitrobenzenamine Allisan Benzenamine, 2,6-dichloro-4-nitro- Botran DCNA Dichloran Dicloran Ditranil Resissan	N/A	N/A	N/A
Diethyl phthalate(84-66-2) 1,2-Benzenedicarboxylic acid, diethyl ester Benzenedicarboxylic acid,1,2-, diethyl ester DEP Diethyl phthalate Phthalic acid, diethyl ester o-Diethyl phthalate	10.000 ug/L	122% Rec (ML)	19.10 % RSD (ML)	100.00 ug/L
Dimethyl phthalate(131-11-3) 1,2-Benzendicarboxylic acid, dimethyl ester 1,2-Benzenedicarboxylic acid, dimethyl ester Benzenedicarboxylic acid,1,2-, dimethyl ester DMP Dimethyl phthalate Phthalic acid, dimethyl ester o-Dimethyl phthalate	10.000 ug/L	120% Rec (ML)	17.20 % RSD (ML)	100.00 ug/L
Dimethyl sulfone(67-71-0) Dimethyl sulfone Methane, sulfonylbis- Sulfonylbismethane Sulonylbismethane	N/A	N/A	N/A
Diphenyl disulfide(882-33-7) Biphenyl disulfide Diphenyl disulfide Diphenyldisulfide Disulfide, diphenyl Phenyl disulfide	N/A	N/A	N/A
Diphenyl ether(101-84-8) Benzene, 1,1'-Oxybis Benzene, 1,1'-oxybis- Diphenyl ether Diphenyl oxide	10.000 ug/L	106% Rec (ML)	8.90 % RSD (ML)	100.00 ug/L
Diphenylamine(122-39-4) Benzenamine, N-phenyl Diphenylamine N,N-Diphenylamine N-Phenylaniline N-Phenylbenzenamine N-Phenylbenzeneamine	20.000 ug/L	111% Rec (ML)	20.60 % RSD (ML)	100.00 ug/L
Erythritol anhydride(1464-53-5) 1,1'-Bi(ethylene oxide) 1,2,3,4-diepoxy butane 1,2:3,4-Diepoxybutane 2,2'-Bioxirane 2,4-Diepoxybutane Butadiene dioxide Butane, 1,2,3,4-diepoxy Dioxybutadiene Erythritol anhydride	N/A	N/A	N/A
Ethyl methanesulfonate(62-50-0) Ethyl mesylate Ethyl methanesulfonate Ethyl methanesulfonic acid Methanesulfonic acid, ethyl ester	N/A	N/A	N/A
Ethylenethiourea(96-45-7) 1,3-Ethylene-2-thiourea 1,3-Ethylenethiourea 2-Imidazolidinethione 2-Thioldihydroglyoxaline ETU Ethylene thiourea Ethylenethiourea Mercaptoimidazoline N,N'-Ethylenethiourea	N/A	N/A	N/A
Fluoranthene(206-44-0) 1,2-Benzacenaphthene Benzo(j,k)fluorene Fluoranthene Idryl	10.000 ug/L	113% Rec (ML)	16.90 % RSD (ML)	100.00 ug/L
Fluorene(86-73-7) 2,2'-Methylenebiphenyl 9H-Fluorene Diphenylenemethane Fluorene o-Biphenylenemethane	10.000 ug/L	104% Rec (ML)	12.00 % RSD (ML)	100.00 ug/L
Herbicides(E-12839) Herbicide formulations Herbicides	N/A	N/A	N/A
Hexachlorobenzene(118-74-1) Anticarie Benzene, hexachloro- Bunt-cure HCB Hexachlorobenzene Perchlorobenzene	10.000 ug/L	106% Rec (ML)	6.30 % RSD (ML)	100.00 ug/L
Hexachlorobutadiene(87-68-3) 1,3-Butadiene, 1,1,2,3,4,4-hexachloro- Butadiene,hexachloro-1,3- Hexachloro-1,3-butadiene Hexachlorobutadiene Perchlorobutadiene	10.000 ug/L	116% Rec (ML)	29.10 % RSD (ML)	100.00 ug/L
Hexachlorocyclopentadiene(77-47-4) 1,3-Cyclopentadiene, 1,2,3,4,5,5-hexachloro- HCCPD HCP Hexachloro-1,3-cyclopentadiene Hexachlorocyclo-1,3-pentadiene Hexachlorocyclopentadiene Perchlorocyclopentadiene	10.000 ug/L	100% Rec (ML)	7.90 % RSD (ML)	100.00 ug/L
Hexachloroethane(67-72-1) 1,1,1,2,2,2-Hexachloroethane Carbon hexachloride Ethane hexachloride Ethane, hexachloro- Hexachlorethane Hexachloroethane Perchloroethane Phenohep	10.000 ug/L	159% Rec (ML)	68.10 % RSD (ML)	100.00 ug/L
Hexachloropropene(1888-71-7) 1-Propene, 1,1,2,3,3,3-hexachloro- 1-Propene, hexachloro- Hexachloropropene Hexachloropropylene Perchloropropene Perchloropropylene	N/A	N/A	N/A
Indeno(1,2,3-cd)pyrene(193-39-5) 1,10-(1,2-Phenylene)pyrene 2,3-Phenylenepyrene Indeno(1,2,3-cd)pyrene o-Phenylenepyrene	20.000 ug/L	N/A	N/A
Isophorone(78-59-1) 2-Cyclohexen-1-one, 3,5,5-trimethyl- 3,5,5-Trimethyl-2-cyclohexen-1-one 3,5,5-Trimethyl-2-cyclohexene-1-one 3,5,5-Trimethyl-2-cyclohexenone Isooctaphenone Isophorone	10.000 ug/L	110% Rec (ML)	13.20 % RSD (ML)	100.00 ug/L
Isosafrole(120-58-1) 1,2-(-Methylenedioxy)-4-propenyl benzene 1,3-Benzodioxole, 5-(1-propenyl)- 4-Propenylcatechol methylene ether Benzene, 1,2-methylenedioxy-4-propenyl- Benzodioxole,s-(1-propenyl)-1,3- Isosafrole Propenyl-1,2-methylenedioxybenzene,4-	N/A	N/A	N/A
Longifolene(475-20-7) 1,4-Methanoazulene, decahydro-4,8,8-trimethyl-9- ... Longifolene	N/A	N/A	N/A
Malachite green(569-64-2) Ammonium, (4-(p-(dimethylamino)-alpha- ... Ammonium, (4-(p-(dimethylamino)-alpha-phenylbe C.I. Basic Acid Green 4 C.I. Basic Green 4 Malachite green Methanaminium, n-[4-[[4-(dimethylamino)phenyl] ...	N/A	N/A	N/A
Mestranol(72-33-3) 17-alpha-19-Norpregna-1,3,5(10)-trien-20-yn-17 17-alpha-19-Norpregna-1,3,5(10)-trien-20-yn-17-ol, 3 ... 17-alpha-Ethynylestradiol 3-methyl ether 19-Norpregna-1,3,5(10)-trien-20-yn-17-ol, 3-methoxy- ... 3-Methoxy-19-nor-17-alpha-pregna-1,3,5(10)-trien-20- ... Devocin Inostral Menophase Mestranol Norquen Ovastol	N/A	N/A	N/A
Methapyrilene(91-80-5) 1,2-Ethanediamine, N,N-dimethyl-N'-2-pyridinyl 1,2-Ethanediamine, N,N-dimethyl-N'-2-pyridinyl-N'-(2 ... 2-((2-Dimethylaminoethyl)-2-thenylamino) pyridine Dormin Lullamin Methapyrilene Pyrathyn Pyridine, 2-[(2-(dimethylamino)ethyl)-2-thieny Pyridine, 2-[(2-(dimethylamino)ethyl)-2-thienylamino]- Pyrinistol Rest-on, Restryl Sleepwell, Semikon	N/A	N/A	N/A
Methyl methanesulfonate(66-27-3) Methanesulfonic acid, methyl ester Methyl methanesulfonate Methyl methanesulphonate Methylsulfonic acid, methyl ester	N/A	N/A	N/A
N,N-Dimethylformamide(68-12-2) DMF Formamide, N,N-dimethyl- N,N-Dimethylformamide	N/A	N/A	N/A
N-Nitrosodiphenylamine(86-30-6) Benzenamine, N-nitroso-N-phenyl N,N-diphenylnitrosamine N-Nitroso-N-phenylbenzenamine N-Nitrosodiphenylamine Nitrous diphenylamide	20.000 ug/L	96% Rec (ML)	11.90 % RSD (ML)	100.00 ug/L
N-Nitrosomethylphenylamine(614-00-6) Benzenamine, N-methyl-N-nitroso- N-Nitrosomethylphenylamine n-Methyl-n-nitrosobenzenamine	N/A	N/A	N/A
N-Nitrosomorpholine(59-89-2) 4-Nitrosomorpholine Morpholine, 4-nitroso- N-Nitrosomorpholine	N/A	N/A	N/A
NDBA(924-16-3) 1-Butanamine, N-butyl-N-nitroso- Di-N-butylnitrosamine Dibutylnitrosamine N,N-Dibutylnitrosoamine N-Butyl-N-nitroso-1-butanamine N-Nitroso-dibutylamine N-Nitrosodi-n-butylamine NDBA	N/A	N/A	N/A
NDEA(55-18-5) Diethylnitrosamine Ethanamine, N-ethyl-N-nitroso- N-Nitrosodiethylamine N-ethyl-n-nitrosoethanamine NDEA	N/A	N/A	N/A
NDMA(62-75-9) Dimethylnitrosamine Methamine, N-methyl-N-nitroso- Methanamine, N-methyl-N-nitroso N-Methyl-N-nitroso-methamine N-Methyl-N-nitrosomethanamine N-Nitrosodimethylamine NDMA	50.000 ug/L	N/A	N/A
NDPA(621-64-7) 1-Propanamine, N-nitroso-n-propyl- Di-n-propylamine,n-nitroso- Di-n-propylnitrosamine N-Nitrosodi-n-propylamine N-Nitrosodipropylamine NDPA	20.000 ug/L	N/A	N/A
NMEA(10595-95-6) Ethanamine, N-methyl-N-nitroso Ethylmethylnitrosamine N,n-methylethylnitrosoamine N-Nitroso-N-methylethylamine N-Nitrosomethylethylamine N-methyl-n-nitrosoethanamine NMEA	N/A	N/A	N/A
NPIP(100-75-4) 1-Nitrosopiperidine N-Nitrosopiperidine NPIP Nitrospiperidine,n- No-pip Piperidine, 1-Nitroso- Pyridine, hexahydro-N-nitroso- n-nitrosohexahydro-Pyridine	N/A	N/A	N/A
Naphthalene(91-20-3) Moth balls Naphthalene Naphthalin Naphthene Tar camphor White tar	10.000 ug/L	106% Rec (ML)	10.40 % RSD (ML)	100.00 ug/L
Nitrobenzene(98-95-3) Benzene, nitro- EPA Pesticide Chemical Code 056501 Essence of mirbane Essence of myrbane Mirbane oil Mononitrobenzene Nitrobenzene Nitrobenzol Oil of mirbane Oil of myrbane RCRA waste number U169	10.000 ug/L	105% Rec (ML)	7.30 % RSD (ML)	100.00 ug/L
Organics, semivolatile(E-12884) Organics, semivolatile Semi-volatile organics Semivolatile organics	N/A	N/A	N/A
Organochlorine pesticides(E-12851) Organochlorine pesticides Pesticides, organochlorine	N/A	N/A	N/A
Pentachlorobenzene(608-93-5) 1,2,3,4,5-Pentachlorobenzene Benzene, pentachloro- Pentachlorobenzene	N/A	N/A	N/A
Pentachloroethane(76-01-7) Ethane, pentachloro- Pentachloroethane Pentalin	N/A	N/A	N/A
Pentachlorophenol(87-86-5) PCP Penchlorol Penta Pentachlorophenol Phenol, pentachloro- Santophen I	50.000 ug/L	N/A	N/A
Pentamethylbenzene(700-12-9) Benzene, pentamethyl- Pentamethylbenzene	N/A	N/A	N/A
Perylene(198-55-0) Dibenz(de,k)anthracene Dibenz(de,kl)anthracene Perylene peri-Dinaphthalene	N/A	N/A	N/A
Phenacetin(62-44-2) Acet-p-phenetidin Acetamide, N-(4-ethoxyphenyl)- Acetophenetidin N-(4-ethoxyphenyl)acetamide Phenacetin Phorazetim p-Acetophenetidide p-Acetphenetidin p-Ethoxyacetanilide	N/A	N/A	N/A
Phenanthrene(85-01-8) Phenanthrene Phenathrin	10.000 ug/L	105% Rec (ML)	5.40 % RSD (ML)	100.00 ug/L
Phenol(108-95-2) Benzene, hydroxy- Carbolic acid Hydroxybenzene Oxybenzene Phenic acid Phenol Phenyl hydrate Phenyl hydroxide	10.000 ug/L	N/A	N/A
Phenothiazine(92-84-2) 10H-Phenothiazine 10H-phenothiazine-ol Dibenzo-1,4-thiazine Dibenzothiazine Nemazine Penthazine Phenothiazine Phenthiazine Thiophenylamine [1,1'-Biphenyl]-4,4'-diamine	N/A	N/A	N/A
Pronamide(23950-58-5) 3,5-Dichloro-N-(1,1-dimethyl-2-propynyl)benzam 3,5-Dichloro-N-(1,1-dimethyl-2-propynyl)benzamide Benzamide, 3,5-dichloro-N-(1,1-dimethyl-2-prop Benzamide, 3,5-dichloro-N-(1,1-dimethyl-2-propynyl)- Kerb Promamide Pronamide Propyzamide	N/A	N/A	N/A
Pyrene(129-00-0) Benzo[def]phenanthrene Pyrene Pyrene[def]phenanthrene	10.000 ug/L	108% Rec (ML)	11.60 % RSD (ML)	100.00 ug/L
Pyridine(110-86-1) Azabenzene Azine Pyridine	N/A	N/A	N/A
Resorcinol(108-46-3) 1,3-Benzenediol 1,3-Dihydroxybenzene 3-Hydroxyphenol Resorcin Resorcinol m-Dihydroxybenzene m-Hydroxyphenol meta-Dihydroxybenzene	N/A	N/A	N/A
Safrole(94-59-7) 1,3-Benzodioxole, 5-(2-propenyl)- Allylcatechol methylene ether Allyldioxybenzene methylene ether Benzene, 1,2-methylenedioxy-4-allyl Benzodioxole,5-(2-propenyl)-1,3- Methylenedioxybenzene,4-allyl-1,2- Safrole	N/A	N/A	N/A
Squalene(7683-64-9) 2,6,10,14,18,22-Tetracosahexaene, 2,6,10,15,19 2,6,10,14,18,22-Tetracosahexaene, 2,6,10,15,19,23- ... Squalene	N/A	N/A	N/A
Styrene(100-42-5) Benzene, ethenyl- Cinnamene Cinnamol Phenylethene Phenylethylene Styrene Styrol Styrolene Vinylbenzene	10.000 ug/L	111% Rec (ML)	24.30 % RSD (ML)	100.00 ug/L
Thianaphthene(95-15-8) 1-Benzothiophene 2,3-Benzothiophene Benzo(b)thiophene Benzothiofuran Thianaphthene Thionaphthene	N/A	N/A	N/A
Thioacetamide(62-55-5) Acetothioamide Ethanethioamide Thioacetamide	N/A	N/A	N/A
Thioxanthone(492-22-8) 9H-Thioxanthen-9-one Thiaxanthenone Thioxanthe-9-one Thioxanthone	N/A	N/A	N/A
Triphenylene(217-59-4) 1,2,3,4-Dibenznaphthalene 2,10-Benzophenanthrene 9,10-Benzphenanthrene Benzo(i)phenanthrene Isochrysene Triphenylene	N/A	N/A	N/A
Tripropyleneglycol methyl ether(20324-33-8) Tripropyleneglycol methyl ether	N/A	N/A	N/A
Volatile organic compounds(E-12419) Organic compounds, volatile VOCs Volatile organic compounds	N/A	N/A	N/A
alpha-Naphthylamine(134-32-7) 1-Aminonaphthalene 1-Naphthalenamine 1-Naphthylamine Naphthalidine alpha-Naphthylamine	N/A	N/A	N/A
alpha-Picoline(109-06-8) 2-Methylpyridine 2-Picoline Pyridine, 2-methyl- alpha-Picoline	50.000 ug/L	95% Rec (ML)	17.60 % RSD (ML)	100.00 ug/L
alpha-Terpineol(98-55-5) .alpha.-Terpineal 3-Cyclohexene-1-methanol, .alpha.,.alpha.,4-trimethyl- Terpineols ( unspec. ) alpha-Terpineol p-Meth-1-en-8-ol	10.000 ug/L	101% Rec (ML)	22.40 % RSD (ML)	100.00 ug/L
beta-Naphthylamine(91-59-8) 2-Aminonaphthalene 2-Naphthalenamine 2-Naphthylamine beta-Naphthylamine	50.000 ug/L	127% Rec (ML)	61.50 % RSD (ML)	100.00 ug/L
bis(2-Chloroethoxy)methane(111-91-1) 1,1'-(methylenebis(oxy))bis(2-chloro-Ethane) Dichloromethoxy ethane Ethane, 1,1'-[methylenebis(oxy)]bis[2-chloro- Methane, bis(2-chloroethoxy)- bis(2-Chloroethoxy)methane	10.000 ug/L	N/A	N/A
bis(2-Chloroethyl) ether(111-44-4) 1,1'-Oxybis(2-chloro-ethane) 2,2'-Dichlorodiethyl ether 2,2'-Dichloroethyl ether BCEE Chlorex Dichloroethyl ether Dichloroethyl ether,beta,beta'- Ethane, 1,1'-oxybis[2-chloro- Ether, bis(2-chloroethyl) bis(2-Chloroethyl) ether sym-Dichloroethyl ether	10.000 ug/L	106% Rec (ML)	20.60 % RSD (ML)	100.00 ug/L
bis(2-Chloroisopropyl) ether(108-60-1) 2,2'-Dichloroisopropyl ether 2,2'-oxybis(1-chloropropane) DCIP Dichlorodiisopropyl ether Ether, bis(2-chloro-1-methylethyl) Propane, 2,2'-oxybis[1-chloro- bis(2-Chloro-1-methylethyl) ether bis(2-Chloroisopropyl) ether	10.000 ug/L	106% Rec (ML)	9.10 % RSD (ML)	100.00 ug/L
bis(2-Ethylhexyl) phthalate(117-81-7) 1,2-Benzenedicarboxylic acid, bis(2-ethylhexyl 1,2-Benzenedicarboxylic acid, bis(2-ethylhexyl)ester BEHP BEHP, DEHP DEHP Di(2-ethylhexyl) phthalate Di(2-ethylhexyl)orthophthalate Di(sec-octyl) phthalate Di-(2-ethylhexyl)phthalate Di-sec-octyl phthalate Diethylhexyl phthalate Phthalic acid dioctyl ester Phthalic acid, bis(2-ethylhexyl) ester bis(2-Ethylhexyl) phthalate bis(2-Ethylhexyl)-1,2-benzenedicarboxylate bis(2-Ethylhexyl)-o-phthalate	10.000 ug/L	125% Rec (ML)	19.60 % RSD (ML)	100.00 ug/L
n-Decane(124-18-5) n-C10 n-Decane	10.000 ug/L	72% Rec (ML)	36.80 % RSD (ML)	100.00 ug/L
n-Docosane(629-97-0) n-C22 n-Docosane	10.000 ug/L	N/A	N/A
n-Dodecane(112-40-3) Dihexyl n-C12 n-Dodecane	10.000 ug/L	N/A	N/A
n-Eicosane(112-95-8) Didecyl n-C20 n-Eicosane	10.000 ug/L	122% Rec (ML)	29.80 % RSD (ML)	100.00 ug/L
n-Hexacosane(630-01-3) Cerane n-C26 n-Hexacosane	N/A	N/A	N/A
n-Hexadecane(544-76-3) Biocyl Cetane n-C16 n-Hexadecane	10.000 ug/L	115% Rec (ML)	14.20 % RSD (ML)	100.00 ug/L
n-Octacosane(630-02-4) n-C28 n-Octacosane	10.000 ug/L	N/A	N/A
n-Octadecane(593-45-3) n-C18 n-Octadecane	10.000 ug/L	121% Rec (ML)	42.10 % RSD (ML)	100.00 ug/L
n-Tetracosane(646-31-1) n-C24 n-Tetracosane	10.000 ug/L	106% Rec (ML)	8.40 % RSD (ML)	100.00 ug/L
n-Tetradecane(629-59-4) n-C14 n-Tetradecane	10.000 ug/L	N/A	N/A
n-Triacontane(638-68-6) n-C30 n-Triacontane	10.000 ug/L	113% Rec (ML)	20.90 % RSD (ML)	100.00 ug/L
o-Anisidine(90-04-0) 2-Aminoanisole 2-Anisidine 2-Methoxyaniline 2-Methoxybenzenenamine Benzenamine, 2-methoxy- o-Anisidine	N/A	N/A	N/A
o-Cresol(95-48-7) 1-Hydroxy-2-methylbenzene 2-Cresol 2-Hydroxytoluene 2-Methylphenol Phenol, 2-methyl- o-Cresol o-Cresylic acid o-Hydroxytoluene o-Methylphenol o-Oxytoluene	N/A	N/A	N/A
o-Toluidine(95-53-4) 2-Amino-1-methylbenzene 2-Aminotoluene 2-Methylbenzenamine Benzenamine, 2-methyl- Benzeneamine, 2-methyl- o-Toluidine	N/A	N/A	N/A
p-Chloroaniline(106-47-8) 4-Chloroaniline 4-Chlorobenzenamine Benzenamine, 4-chloro- p-Chloroaniline	N/A	N/A	N/A
p-Cymene(99-87-6) 1-Methyl-4-(1-methylethyl) benzene 4-Isopropyl-1-methylbenzene 4-Isopropyltoluene Benzene, 1-methyl-4-(1-methylethyl)- Cymol Dolcymene Methylisopropylbenzene Paracymene p-Cymene p-Isopropyltoluene p-Methyl-cumene	10.000 ug/L	103% Rec (ML)	10.10 % RSD (ML)	100.00 ug/L
p-Dimethylaminoazobenzene(60-11-7) 4-(N,N-Dimethylamino)azobenzene 4-Dimethylaminoazobenzene Benzenamine, N,N-dimethyl-4-(phenylazo)- C.I. Solvent Yellow 2 Dimethyl yellow N,N-Dimethyl-4-(phenylazo)benzenamine N,N-Dimethyl-p-phenylazoaniline p-Dimethylaminoazobenzene p-Dimethylcarbamoyl Chloride	N/A	N/A	N/A
p-Nitroaniline(100-01-6) 4-Nitroaniline 4-nitro-Benzenamine Aniline, 4-nitro Benzenamine, 4-nitro- p-Nitraniline p-Nitroaniline	N/A	N/A	N/A

Precision Descriptor Notes:	Summarized data results are based on quantification by isotope dilution. Precision and accuracy data were obtained from "Interlaboratory Validation of U.S. Environmental Protection Agency Method 1625A" (July 1984). Study data were collected for samples analyzed at 11-13 laboratories, depending on compounds. Approximately twenty-three percent of laboratories could not quantify or detect compounds by isotope dilution, so these laboratories were excluded from method summaries (the need for these exclusions was primarily based on lack of experience with the method at the time of the 1984 study).
Detection Level Note:	(1) The values given are the minimum level at which the entire GC/MS system must give recognizable mass spectra (background corrected) and acceptable calibration points. (2) The values given refer to one of three techniques for each compound: internal standard quantification, labeled compound quantification, and isotope dilution quantification. Consult Table 3 of the method for information on specific compounds.

Precision Descriptor Notes:

Summarized data results are based on quantification by isotope dilution. Precision and accuracy data were obtained from "Interlaboratory Validation of U.S. Environmental Protection Agency Method 1625A" (July 1984). Study data were collected for samples analyzed at 11-13 laboratories, depending on compounds. Approximately twenty-three percent of laboratories could not quantify or detect compounds by isotope dilution, so these laboratories were excluded from method summaries (the need for these exclusions was primarily based on lack of experience with the method at the time of the 1984 study).

Detection Level Note:

(1) The values given are the minimum level at which the entire GC/MS system must give recognizable mass spectra (background corrected) and acceptable calibration points.
(2) The values given refer to one of three techniques for each compound: internal standard quantification, labeled compound quantification, and isotope dilution quantification. Consult Table 3 of the method for information on specific compounds.

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40 CFR Part 136, Appendix A (Current Edition)

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EPA-EAD: 1625: Semivolatiles - Base/Neutrals, Acid Extractable, GC/MS

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