Citation: Zhen Yu Zhang, Wei An Liang. Indirect Spectrophotometric Determination of Sulphide with the Complex of Cd(Ⅱ)-5-Br-PADAP-CPB[J]. Chinese Chemical Letters, ;1997, 8(11): 983-984. shu

Indirect Spectrophotometric Determination of Sulphide with the Complex of Cd(Ⅱ)-5-Br-PADAP-CPB

Department of Chemistry, Shandong University, Jinan 250100

Received Date: 13 June 1997

By the use of CPB,Cd(Ⅲ) forms a highly sensitive complex with 5-Br-PADAP in aqueous solution,molar absorptivity ε is 1.21×10⁵1.mol^-1·cm^-1.Trace amount of sulphide can be determined from its effect on the complex of Cd (Ⅲ)-5-Br-PADAP-CPB,sulphide in the range 0~3.2×10^-6mol dm^-3 causes a decrease in absorption,that is a linear function of the concentration.For 13ng cm^-3 sulphide,common metal ions such as Na⁺,K⁺,Ca²⁺,Mg²⁺,Al³⁺ and anions such as CO₃^2- (24μg cm^-3),S₂O₃^2-(22μg cm^-3),PO₄^3-(20μg cm^-3) etc.do not interfere.A method for the indirect determination of sulphide in beer and industrial waste water with good selectivity and accuracy is described.
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