离子色谱法测定氯化石蜡中的总氯量

采用氧瓶燃烧法处理氯化石蜡样品,用离子色谱测定吸收液中Cl^-的方法来确定氯化石蜡的总氯量。在Metrosep A SUPP5型阴离子分离柱上,以3．2mmol／LNa2CO3和1．0mmol／LNaHCO3混合溶液作为淋洗液,抑制型电导检测,检出限为0．87μg／L,线性范围0．1—4mg／L,相对标准偏差与回收率分别为1．71％～2．14％、94．4％-103．1％。该方法简便、快速,结果与国家标准法比较无显著性差异。

Determination of Total Chlorine in Chlorinated Paraffin by Ionic Chromatogram

A simple and rapid method for the determination of Cl-in the absorbent liquid by oxygen flask combustion-ionic chromatogram was developed to monitor the total chlorine of chlorinated paraffin.A mixed solution containing 3.2 mmol/L Na2CO3 and 1.0 mmol/L NaHCO3 was used as an eluate on an anion separation column of the model Metrosep A SUPP 5,the detection limit of suppressed conductivity detection was 0.87 μg/L and the calibration graph was linear for 0.1～4 mg/L.The relative standard deviation and the recovery of this method were 1.71%～2.14% and 94.4%～103.1%.Analytical results obtained by this method checked quite well with those obtained by the national standard method.