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Determination of ultratrace silver using surfactant as sensitizer by catalytic near field laser thermal lens spectrometry
Author(s) -
Han Quan,
Yan HongTao,
Qian ZhenJie
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040221022
Subject(s) - chemistry , detection limit , persulfate , mass spectrometry , lens (geology) , linear range , catalysis , laser , analytical chemistry (journal) , chromatography , optics , organic chemistry , physics
A new method for the determination of ultratrace silver(I) by near field laser thermal lens spectrometry has been developed. This method is based on the silver(I) catalyzed discoloring reaction of bromcresol green oxidized by sodium persulfate in the presence of α,α'‐bipyridine as an activator and TritonX‐100 as a sensitizer. The reaction mechanism was discussed. The linear range of the method is 0–1.6 ng·mL −1 and the detection limit is 2×10 −2 ng·mL −1 for silver. The method has been applied to the determination of silver in lead powder and photographic paper with satisfactory results.