EPA-NERL: 208.1: Barium by Flame AA
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Official Method Name
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Barium (Atomic Absorption, Direct Aspiration) |
|---|---|
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Current Revision
| Issued 1974 |
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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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Brief Method Summary
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A sample prepared according to EPA Method 200.0 is analyzed using a flame atomic absorption spectrometer. Specifications for instrument operation and preparation of standards are provided in the method. |
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Scope and Application
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This method determines barium by flame atomic absorption spectrometry. Sample pretreatment according to EPA Method 200.0 determines the applicability. |
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Applicable Concentration Range
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1,000 - 20,000 ug/L (optimal range); 400 ug/L (sensitivity). |
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Interferences
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(A) Ionization: Barium is easily ionized by the oxide-acetylene flame. Add potassium (1000 mg/L) to samples and standards to control this effect. (B) Acetylene-Air: If acetylene-air is used, phosphate, silicon, and aluminum will severely suppress the barium absorbance. This may be overcome by adding 2000 mg/L of lanthanum. For additional interferences see EPA Method 200.0. |
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Quality Control Requirements
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QC requirements for drinking water procedures are provided in method 200.0. |
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Sample Handling
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Sample handling and preservation procedures are provided in EPA Method 200.0. |
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Maximum Holding Time
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6 months (MCAWW, Table 1). |
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Relative Cost
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Less than $50 |
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Sample Preparation Methods
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200.0 |
