离子色谱法测定食盐中的硫酸根

Determination of sulfate in salt by ion chromatography

中文关键词:  离子色谱  食盐  硫酸根

英文关键词:ion chromatography  salt  sulfate

中文摘要:

      目的 建立食盐中硫酸根的离子色谱检测方法。方法 利用银柱和钠柱做固相萃取柱, 简化样品前处理, 对分离硫酸根的淋洗液梯度条件进行了优化设计, 建立了食盐中硫酸根含量的自动分析方法。结果 在最佳工作条件下, 获得硫酸根在1~100 mg/L浓度范围内具有良好的线性关系, 加标回收率为97.89~100.50%, 相对标准偏差为0.57%。结论 方法优化后, 基于ICS3000型的离子色谱方法能够去除高浓度氯离子的干扰, 缩短样品的处理时间, 提高硫酸根的选择性。本方法具有操作简单、响应迅速、干扰小、精确度和灵敏度高等特点。

英文摘要:

      Objective To establish a determination methods of sulfate in salt by ion chromatography. Methods The modified gradient procedure was used to separate the sulfate standard on an anion exchange column by using silver column and nano-column as solid phase extraction column, and automatic analysis method of sulfate in salt was established. Results Under optimal experimental condition, the linear range of the sulfate was 0~100 mg/L. Standard addition recovery was 97.89~100.50%, the sulfate of salt RSD value was 0.57%. Conclusion The method base on ICS3000 ion chromatography could exclude chloride ion interference, shorten the processing time of sample, and improve the selectivity of sulfate. This method has many advantages such as simple operation, quick response, low interference, and high accuracy and sensitivity.