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色谱

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30%亚硫酸氢钠溶液样品中Cl-和SO2-4的同时测定

陆克平   

  1. Inspection Center of Anqing Company, China Petroleum & Chemical Corporation, Anqing 246002, China
  • 收稿日期:2004-03-03 修回日期:1900-01-01 出版日期:2005-03-30 发布日期:1988-12-25
  • 通讯作者: 陆克平
  • 基金资助:

Simultaneous Determination of Cl- and SO2-4 in 30% Sodium Bisulfite Solution Samples by Ion Chromatography

LU Keping   

  1. Inspection Center of Anqing Company, China Petroleum & Chemical Corporation, Anqing 246002, China
  • Received:2004-03-03 Revised:1900-01-01 Online:2005-03-30 Published:1988-12-25

PDF

968

被引次数

14

摘要： 建立了采用离子色谱测定30%亚硫酸氢钠溶液样品中的氯化钠和硫酸钠含量的新方法。采用IonPac AS14分析柱，选择三乙醇胺为亚硫酸氢钠的稳定剂,以丙酮为有机改进剂，淋洗液组成为1.5 mol/L Na2CO3-3.5 mol/L NaHCO3-10% （体积分数）(CH3)2CO,流速为1.0 mL/min,抑制电导检测。实验结果表明，氯离子、硫酸根离子分别在0.05~1.5 mg/L,0.20~15 mg/L时，其峰面积与质量浓度呈线性关系，相关系数均大于0.999，检出限分别为0.01 mg/L和0.03 mg/L。该法用于实际样品分析,操作便捷,结果可靠。

关键词: 30%亚硫酸氢钠溶液 , 离子色谱, 硫酸钠, 氯化钠

Abstract: A novel method for simultaneous determination of Cl- and SO2-4 in 30% sodium bisulfite solution samples by ion chromatography was established. A sample was pretreated with triethanolamine (TEA) to prevent sulfite from becoming sulfate. The mixture solution of 1.5 mol/L Na2CO3-3.5 mol/L NaHCO3-10% (v/v) (CH3)2CO was used as eluent with a flow rate of 1.0 mL/min. The injection volume was 25 μL. The separation was performed on an IonPac AS14 column and detected by suppressed conductivity with external acid mode. Both Cl- and SO2-4 have good linearity in the ranges of 0.05-1.5 mg/L and 0.20-15 mg/L with correlation coefficients above 0.999 and the detection limits of Cl- and SO2-4 were 0.01 and 0.03 mg/L, respectively. The proposed method is simple and rapid and has been successfully applied to the analysis of 30% sodium bisulfite samples. The entire process of analysis is completed within 12 min.

Key words: 30% sodium bisulfite solution30% , sodium chloride, sodium sulfate, ion chromatography