Received date: 2001-10-07
Online published: 2010-10-01
The blue complex of cadmium(Ⅱ)wi th 1,5 -di -(2 -hydroxy -5 -sulfophenyl)-3 -cy anoformazan disodium salts (DSPCF)is formed in a buffer solution of bo rax -hydrochloric acid(pH 9).The complex has a maximum absorption waveleng th at 610 nm.The apparent molar absorptivity is 5.76 ×104 L/(mol?cm).The trace cadmium is ex trasted with di-(1 -methy lheptyl)methylphosphonate -HBr by chromatog raphy separat ion,to improve the selectivi ty.The method has been applied to the determination of trace cadmium in water with satisfactory result s.
ZHU Lizhe . Spectrophotometric determination of trace cadmium in water[J]. Industrial Water Treatment, 2002 , 22(4) : 47 -48 . DOI: 10.11894/1005-829x.2002.22(4).47
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