通过铜（II）对3-甲基-2-苯并噻唑啉酮腙与N-乙基-N-（2-羟基-3-磺丙基）-3,5-二甲氧基苯胺氧化偶联反应的催化作用测定超痕量铜（II） 。
Determination of ultratrace amounts of copper (II) by its catalytic effect on the oxidative coupling reaction of 3-methyl-2-benzothiazolinone hydrazone with N-ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline.
作者信息
Ohno S, Teshima N, Watanabe T, Itabashi H, Nakano S, Kawashima T
机构信息
Laboratory of Analytical Chemistry, Department of Chemistry, University of Tsukuba, Japan.
出版信息
Analyst. 1996 Oct;121(10):1515-8. doi: 10.1039/an9962101515.
A spectrophotometric method was developed for the determination of ultratrace amounts of copper(II) based on its catalytic effect on the oxidative coupling reaction of 3-methyl-2-benzothiazolinone hydrazone with N-ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline to produce an intensely coloured dye (lambda(max) = 525 nm) in the presence of hydrogen peroxide. In this reaction, pyridine acted as an effective activator for the catalysis of copper(II). By measuring the absorbance of the dye, copper(II) can be determined at the 0.002-0.1 ng cm(-3) (3.1 x 10(-11)-1.6 x 10(-9) mol dm(-3) level. The relative standard deviation for ten determinations of 0.06 ng cm(0-3) of copper(II) was 2.6%. The proposed method was successfully applied to the determination of copper(II) in tap water and biological material.
基于铜（II）对3-甲基-2-苯并噻唑啉酮腙与N-乙基-N-（2-羟基-3-磺丙基）-3,5-二甲氧基苯胺在过氧化氢存在下的氧化偶联反应的催化作用，建立了一种分光光度法用于测定超痕量的铜（II）。在此反应中，吡啶作为铜（II）催化的有效活化剂。通过测量染料的吸光度，可在0.002 - 0.1 ng cm⁻³（3.1×10⁻¹¹ - 1.6×10⁻⁹ mol dm⁻³）水平测定铜（II）。对0.06 ng cm⁻³铜（II）进行十次测定的相对标准偏差为2.6%。该方法成功应用于自来水和生物材料中铜（II）的测定。
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