摘要
本文对新合成的试剂４－对甲苯基－１－对苯磺酸钠硫代氨基脲（４－ｐ－ｍｅｔｈｙｌｐｈｅｎｙｌ－１－（ｓｏｄｉｕｍ－ｐ－ｐｈｅｎｙｌｓｕｌｐｈｏｎａｔｅ）ｔｈｉｏｓｅｍｉｃａｒｂａｚｉｄｅ（简称ｐＭＰＴ）与Ｃｕ（Ⅱ）的配合物进行了研究，发现在０．００６％Ｔｗｅｅｎ－８０的ＮＨ３－ＮＨ４Ｃｌ溶液中，配合物于－０．６３Ｖ（ｖｓ．ＳＣＥ）处产生一灵敏的吸附波，峰电流与Ｃｕ（Ⅱ）浓度在５～１１０ｎｇ／ｍＬ范围内有线性关系，检测限为３ｎｇ／ｍＬ，应用于人发、硫酸镍中铜的测定，均得到了满意的结果。试验了多种表面活性剂的影响，测得配合物组成为Ｃｕ（Ⅱ）∶ｐＭＰＴ＝１∶３，条件稳定常数β＝５．５４×１０１７，并对该体系的极谱波性质及其反应机理进行了探讨。
The adsorptive complex wave of Cu(Ⅱ) with the newly synthetic reagent 4 p methylphenyl 1 (sodium p phenylsulphonate)thiosemicarbazide ( p MPT) has been studied in this paper.Experiments show that in an NH 3 NH 4Cl solution containing 0.006% Tween 80 at pH=10,a sensitive adsorptive wave is produced at -0.63V ( vs .SCE).The peak current is proportional to the concentration of copper over the range of 5～110μg/L.The detection limit is 3μg/L.The method was used for the determination of copper in human hair and nickel sulfate and satisfactory results were obtained.The influences of various kinds of surfactants were studied.The composition ratio of the complex is Cu(Ⅱ)∶ p MPT=1∶3 and condition stability constant is β=5 54×10 17 The behaviours of polarographic wave and the mechanism of electrode reaction were also investigated.
出处
《分析试验室》
CAS
CSCD
1997年第2期9-13,共5页
Chinese Journal of Analysis Laboratory
基金
河南省自然科学基金
关键词
配合物吸附波
铜
TWEEN-80
pMPT
Adsorptive wave of complex
4
p
methylphenyl 1 (sodium p
phenylsulphonate) thiosemicarbazide
copper determination
Tween 80
