离子色谱法同时测定饮水中9种阴离子
高嵩
湖北省宜都市疾病预防控制中心,湖北宜都 443300
Simultaneous determination of nine anions in drinking water by ion chromatography
GAO Song
Disease Prevention and Control Center of Yidu City, Hubei Province, Yidu 443300, China
摘要:建立离子色谱抑制电导检测法同时测定饮水中 F-、ClO2-、Cl- 、NO2- 、ClO3- 、Br-、NO3-、H2PO4- 和 SO42- 9 种阴离子的方法。采用 SH-AP-2 型阴离子交换柱为分离柱,以 4.0 mmol/L Na2CO3-4.0 mmol/L NaHCO3溶液为淋洗液,流量为 0.80 mL/min,采用等度洗脱方式将 9 种阴离子完全分离,利用抑制电导检测。ClO2-、ClO3-的质量浓度在 0.05~2.0 mg/L 范围内,SO42-的质量浓度在 1.0~40.0 mg/L 范围内,NO3-、H2PO4-和 Cl-的质量浓度在 0.25~10.0 mg/L 范围内,NO2-、Br- 和 F-的质量浓度在 0.10~4.0 mg/L 范围内分别与色谱峰面积呈良好的线性关系,相关系数为 0.999 3~0.999 9,9 种阴离子的检出限为 0.01~0.04 mg/L。样品加标回收率为 88.0%~105.6%,5 次平行测定结果的相对标准偏差小于 5%。该方法可用于饮水中多种阴离子的同时测定。
Abstract:A method for simultaneous determination of nine anions including F-,ClO2-, Cl-, NO2-,ClO3-, Br-, NO3-,H2PO4-, SO42- in drinking water by ion chromatography suppressed conductivity detection was established. SH-AP-2 anion exchange column was used as the separation column, 4.0 mmol/L Na2CO3-4.0 mmol/L NaHCO3 solution was used as the eluent, and the flow rate was 0.80 mL/min. 9 anions were completely separated by equal degree elution and determined by inhibition conductivity detector. The chromatography peak area showed good linear relationship with the mass concentrations in the range of 0.05-2.0 mg/L for ClO2-, ClO3-, 1.0-40.0 mg/L for SO42-, 0.25-10 mg/L for NO3-,H2PO4-, Cl-, and 0.10-4.0 mg/L for NO2-, Br-, F-, respectively. The correlation coefficients were 0.999 3-0.999 9, The detection 2 limits of 9 anions were 0.01-0.04 mg/L. The recovery rates were 88.0%-105.6%, and the relative standard deviations of 5 parallel determination results were less than 5%. This method can be used for the simultaneous determination of various anions in drinking water.
关键词:离子色谱法;饮水;亚氯酸盐;氯酸盐;阴离子
Keywords:ion chromatography; drinking water; chlorite; chlorate; anion
本文引用格式:
高嵩.离子色谱法同时测定饮水中9种阴离子[J].化学分析计量,2023,32(10):35.
GAO Song. Simultaneous determination of nine anions in drinking water by ion chromatography[J]. Chemical Analysis and Meterage,2023,32(10):35.
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