Attempts to eliminate interferences in the determination of arsenic, antimony, tin and germanium by molecular emission cavity analysis with the hydride generation technique
- 1 January 1982
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 107 (1277) , 872-878
- https://doi.org/10.1039/an9820700872
Abstract
Interferences in the determination of arsenic, antimony, tin and germanium by molecular emission cavity analysis with the hydride generation technique are reported. Many ions suppressed the emissions. Most of the interferences on the emission of arsenic, antimony and germanium were eliminated by masking with EDTA, which, however, caused broadening of the tin peak. Suppression by Cd2+ and Zn2+ of the tin emission was more serious in the presence of EDTA. The effect of Hg2+ on the emission of arsenic, antimony and tin was eliminated by masking with potassium iodide, and that of Ag+ on the emission of antimony and tin was eliminated by separating as silver chloride. Cu2+ suppressed all four emissions and suppression of the arsenic emission was eliminated by separating Cu2+ as its hexacyanoferrate(II) precipitate; this precipitate strongly adsorbed antimony, tin and germanium ions.Keywords
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