EPA-NERL: 215.1: Calcium by Flame AA
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Official Method Name
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Calcium (Atomic Absorption, Direct Aspiration) |
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Current Revision
| Issued 1971; Editorial Revision 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 calcium 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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0.2-7 mg/L (optimal range); 0.08 mg/L (sensitivity). |
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Interferences
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(A) Ionic Compounds: Phosphate, sulfate, and aluminum and anions can interfere, but are masked by the addition of lanthanum. Neutral pH: Results may be low if pH is above 7. Acidify samples and standards with dilute hydrochloric acid to overcome this interference. (C) Ionization: Ionization interferences should be controlled by adding large amounts of alkali to the sample. 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 |
