title: Spectrophotometric determination of silver with cadion 2B and triton X-100.
abstract: A highly sensitive and selective procedure for spectrophotometric determination of silver has been developed. At pH 9.2, in the presence of Triton X-100, silver forms a dark red-violet complex with cadion 2B which has an absorption maximum at 565 nm. The molar absorptivity is 1.0 x 10(5) l.mole(-1).cm(-1). Beer's law is obeyed for silver in the range 0.02-0.8 mug ml . The colour reaction, if EDTA is used as a masking agent, is free from interference by the 20 cations and 19 anions investigated. Only Cl(-), Br(-), I(-), S(2-) and CN(-) interfere and must be absent. This method has been used to determine silver in waste-water.
authors.affiliation: Department of Chemistry, China University of Science & Technology, Hefei, China.
authors.forename: W
authors.initials: W
authors.lastname: Fu-Sheng
authors.forename: Y
authors.initials: Y
authors.lastname: Fang