USGS-NWQL: I-7095: Beryllium, suspended-recoverable, water, FLAA
|
Official Method Name
|
Beryllium, atomic absorption spectrometric, direct |
|---|---|
|
Current Revision
| Revised 1985 |
|
Media
|
WATER |
|
Instrumentation
|
Flame Atomic Absorption |
|
Method Subcategory
|
Inorganic |
|
Method Source
|
|
|
Citation
|
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 |
|
Brief Method Summary
|
Beryllium is determined by atomic absorption spectrometry. Calcium chloride is added to control ionization of beryllium in the flame. |
|
Scope and Application
|
This method may be used to analyze water and water-suspended sediment containing at least 10 ug/L of beryllium. Sample solutions containing more than 200 ug/L need to be diluted. Suspended recoverable beryllium is calculated by subtracting dissolved beryllium from total recoverable beryllium. |
|
Applicable Concentration Range
|
10-200 ug/L |
|
Interferences
|
Beryllium is slightly ionized in the nitrous oxide-acetylene flame; to control this effect, calcium chloride solution must be added to each standard and sample. Bicarbonate ion interferes; however, this interference is of no consequence if samples pre-served by the addition of acid are used for the analysis. Aluminum at concentrations greater than 500 ug/L has been reported to depress the beryllium absorbance. Sodium and silicon at concentrations in excess of 1000 mg/L have been reported to severely depress the beryllium absorbance (Environmental Protection Agency, 1979). |
|
Quality Control Requirements
|
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). |
|
Sample Handling
|
Container Description: 250 mL Polyethylene bottle, acid-rinsed. Treatment and Preservation: Use unfiltered sample to rinse bottles, then acidify collected sample with HNO3 to pH < 2. |
|
Maximum Holding Time
|
180 days |
|
Relative Cost
|
Less than $50 |
|
Sample Preparation Methods
|
