论文信息 - Spectrophotometric determination of silver with cadion 2B and triton X-100.

Spectrophotometric determination of silver with cadion 2B and triton X-100.

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.

Y Fang | Y. Fang | W Fu-Sheng | W. Fu-sheng

[1] H. Watanabe,et al. Dual-wavelength spectrophotometric determination of cadmium with cadion. , 1979, Talanta.

[2] R. W. Frei,et al. Spectrophotometric determination of trace amounts of silver(I) , 1968 .

[3] T. S. West,et al. A selective and sensitive colour reaction for silver , 1964 .

[4] H. Chung-gin,et al. Spectrophotometric determination of micro amounts of cadmium in waste water with cadion and triton X-100. , 1980, Talanta.

[5] S. Khopkar,et al. Extraction-spectrophotometric determination of silver with thiodibenzoylmethane , 1975 .

[6] B. Subrahmanyam,et al. Spectrophotometric determination of silver(I) with 4-(2-pyridylazo)-resorcinol , 1974 .

[7] P. Chavanne,et al. Emploi du ,′cadion″ en chimie analytique , 1958 .