USGS-NWQL: I-5084: Barium, recoverable-from-bottom-material, dry wt
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Official Method Name
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Barium, atomic absorption spectrometric, direct |
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Current Revision
| Revised 1985 |
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Media
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VARIOUS |
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Instrumentation
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Flame Atomic Absorption |
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Method Subcategory
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Inorganic |
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Method Source
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Citation
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Methods for the Determination of Inorganic Substances in Water and Fluvial Sediments, Techniques of Water-Resources Investigations of the United States Geological Survey, Book 5, Chapter A1 Edited by Marvin J. Fishman and Linda C. Friedman |
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Brief Method Summary
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Barium is determined by atomic absorption spectrometry. Sodium chloride is added to control ionization of barium in the flame. |
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Scope and Application
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This method may be used to analyze water and water-suspended sediment containing at least 100 ug/L of barium. Sample solutions containing more than 5000 ug/L need to be diluted. This method may be used to analyze bottom material containing at least 5 ug/g of barium. Total recoverable barium in water-suspended sediment needs to undergo preliminary digestion-solubilization by method I-3485, and recoverable barium in bottom material needs to undergo preliminary digestion-solubilization by method I-5485 before being determined. |
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Applicable Concentration Range
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> 5 ug/g |
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Interferences
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The use of a nitrous oxide-acetylene flame virtually eliminates chemical interferences in the determination of barium. However, barium is easily ionized in the nitrous oxide-acetylene flame; to control this effect, sodium chloride solution must be added to each sample and standard. |
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Quality Control Requirements
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Update QC requirement field to: Calibrate instrument using calibration standards (CAL). Quality control samples (QCS) and laboratory blanks (LB) analyzed at a minimum of I each after every 10 samples. (Reference OFR 95-443). |
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Sample Handling
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Container Description: 500 mL Polypropylene bottle, wide-mouth. Treatment and Preservation: No treatment, preservation or special shipping requirements. |
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Maximum Holding Time
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120 days |
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Relative Cost
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Less than $50 |
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Sample Preparation Methods
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I-5485, P-0520 |
