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Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of antimony by automated-hydride atomic absorption spectrophotometry

January 1, 1994

The analysis of natural-water samples for antimony by automated-hydride atomic absorption spectrophotometry is described. Samples are prepared for analysis by addition of potassium and hydrochloric acid followed by an autoclave digestion. After the digestion, potassium iodide and sodium borohydride are added automatically. Antimony hydride (stibine) gas is generated, then swept into a heated quartz cell for determination of antimony by atomic absorption spectrophotometry. Precision and accuracy data are presented. Results obtained on standard reference water samples agree with means established by interlaboratory studies. Spike recoveries for actual samples range from 90 to 114 percent. Replicate analyses of water samples of varying matrices give relative standard deviations from 3 to 10 percent.

Citation Information

Publication Year 1994
Title Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of antimony by automated-hydride atomic absorption spectrophotometry
DOI 10.3133/ofr93664
Authors G.E. Brown, B.J. McLain
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 93-664
Index ID ofr93664
Record Source USGS Publications Warehouse
USGS Organization National Water Quality Laboratory