USGS-NWQL: I-7084: Barium, suspended-recoverable, water, FLAA
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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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WATER |
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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. Suspended recoverable barium is calculated by subtracting dissolved barium from total-recoverable barium. |
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Applicable Concentration Range
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100-5000 ug/L |
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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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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: 250 mL Polyethylene bottle, acid-rinse. Treatment and Preservation: Use unfiltered sample to rinse bottles, then acidify collected sample with HNO3 to pH < 2. |
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Maximum Holding Time
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180 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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