褪色光度分析法测定水中微量氯离子
Fading photometric method for the determination of traces of chloride in water
Received date: 1999-07-17
Online published: 2014-10-08
田秀君, 杨鸿, 陶若虹 . 褪色光度分析法测定水中微量氯离子[J]. 工业水处理, 2000 , 20(1) : 37 -38 . DOI: 10.11894/1005-829x.2000.20(1).37
It is reported in this paper that diphenylcarbazone reacts with Hg(Ⅱ)in pH 2.2 in the presence of Tween—60 to form a purple complex with its absorption maximum at 486 nm .The existence of chloride will depress the absorption of the complex.The negative absorption will be proportional to the consistence of chloride.Beer's law holds in the concentration range of 0~50μg/50 mL for chlorides.It' s apparent molar absorptivity is 2.74 ×104.The proposed method has been applied to the determination of Cl- in the water with satisfactory .
Key words: fading photometry; chloride; diphenylcarbazone
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