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非水库仑滴定法测定天然水体中溶解的无机碳
引用本文:纪雷,王岩,崔鹤,孙健,王少军.非水库仑滴定法测定天然水体中溶解的无机碳[J].化学分析计量,2002,11(5):10-12.
作者姓名:纪雷  王岩  崔鹤  孙健  王少军
作者单位:青岛出入境检验检疫局化矿金实验室,青岛,266002
摘    要:介绍用非水库仑滴定法测定天然水体中溶解的无机碳,对非水库仑滴定方法的关键技术-非水电解液进行了组分选择及优化,并对实验条件进行了优化。用该方法对碳酸钠标准溶液进行测定,测定结果的相对标准偏差为0.18%,测定值与理论值的平均相对误差为0.48%,表明该方法具有较高的精密度与准确度。

关 键 词:非水库仑滴定法  测定  天然水体  溶解无机碳
修稿时间:2002年4月16日

DETERMINATION OF THE DISSOLVED INORGANIC CARBON IN THE NATURAL WATER BY NON-AQUEOUS COULOMETRY
Ji Lei,Wang Yan,Cui He,Sun Jian,Wang Shaojun.DETERMINATION OF THE DISSOLVED INORGANIC CARBON IN THE NATURAL WATER BY NON-AQUEOUS COULOMETRY[J].Chemical Analysis And Meterage,2002,11(5):10-12.
Authors:Ji Lei  Wang Yan  Cui He  Sun Jian  Wang Shaojun
Abstract:A complete analytical procedure using non-aqueous coulometric titration to determine the dissolved inorganic carbon (DIC) in the natural water was established. The composition of non-aqueous electrolyte was mixture of DMSO, TEAB, ethanola-mine and distilled water, which was studied and optimized to get the finest color switch-point. Also, the optimal experiment parameters were investigated. The standard solution of Na2CO3 was determined by the method. The relative standard deviation is 0. 18% , and the relative error between the determined value and the theoretical value is 0. 48%.
Keywords:non-aqueous solution  coulometry  dissolved inorganic carbon ( DIC)  natural water
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