NEMI Method Summary

Method Summary Information

Method Number: I-5055 Media: VARIOUS
Revision: Revised 1985
Method Source: U.S. Geological Survey (USGS)
Subcategory: INORGANIC Analytes in this method
Official Name: Antimony, atomic absorption spectrometric, hydride
Descriptive Name Antimony, total in bottom material, various, hydride_AA
Source Info: USGS Branch of Information Services
Box 25286, MS 417
Federal Center
Denver, CO 80225-0286
Phone: 303-202-4700
Citation: USGS Methods, Volume A1
57441 Byte file
Brief Method
Summary:
 Organic antimony-containing compounds are decomposed by adding sulfuric and nitric acids and by repeatedly evaporating the sample to fumes of sulfur trioxide. The antimony so liberated, together with inorganic antimony originally present, is subsequently reacted with potassium iodide and stannous chloride, and finally with sodium borohydride to form stibine. The stibine is removed from solution by aeration and swept by a flow of nitrogen into a hydrogen diffusion flame, where it is determined by atomic absorption at 217.6 nm.
Scope And
Application:
 This method may be used to analyze water and water-suspended sediment containing at least 1 ug/L of antimony. Samples containing more than 15 ug/L need to be diluted.
This method may be used to analyze bottom material containing at least 1 ug/g of antimony. Ordinarily, a 100-mg sample of prepared bottom material (method P-0520) is taken for analysis. However, if the sample contains more than 15 ug/g of antimony, a smaller sample needs to be used.
Applicable
Conc Range:
 1-15 ug/g
Interferences: Since the stibine is freed from the original sample matrix, interferences in the flame are minimized. Selenium and arsenic, which also form gaseous hydrides, do not interfere at concentrations of 100 ug/L. Greater concentrations were not tested.
QC 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: 500 mL Polypropylene bottle, wide-mouth.
Treatment and Preservation: No treatment, preservation or special shipping requirements
Max Holding Time:
 180 days
Sample Prep Met P-0520
Relative Cost: Less than $50
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