土壤2016，Vol.48Issue(2)：343-348,6.DOI:10.13758/j.cnki.tr.2016.02.020
离子色谱法和毛细管电泳法测定土壤中氯离子、硫酸根及其差异性
Study on the Determination and Its Difference Analysis of Chloride and Sulfate in Different Soils by Ion Chromatography and Capillary Electrophoresis
摘要
Abstract
Chloride and sulfate in different soil samples with various pH were determined with Ion Chromatography (IC) and Capillary Electrophoresis (CE), respectively. The results showed that these two methods both worked well as the measured values of chloride and sulfate were consistent with these obtained with the standard titration method, but the relative standard deviation in measurements of CE (8.97%) was greater than that of IC (3.61%). The statisticalF-test andt-test showed that there was no significant difference on the measurements between the two methods for alkaline and neutral soils, but the significant difference was observed for the acid soil of ASA-5a. The lower pH and ionic strength of ASA-5a affected the electroosmotic flow (EOF) of fused silica capillary and changed the separation process of anions in CE, thus caused bigger deviation of measured chloride than other methods, i.e. IC and titration method. Meanwhile, acid soil samples could bring secondary retention of ions in IC measurements compared with other soils. Moreover, alkali eluent caused the formation of crystallization in separation process of acid soil samples with IC, which led to a bigger deviation of measured Sulfate than other methods, i.e. CE and titration methods. Therefore, CE and IC methods have their own merits and demerits. CE is a new method for measurements of soil chloride and sulfate, and more studies should be conducted to improve experimental conditions in the future, especially for acid soils.关键词
离子色谱/毛细管电泳/土壤/氯离子/硫酸根Key words
Ion Chromatography/Capillary Electrophoresis/Soil/Chloride/Sulfate分类
农业科技引用本文复制引用
蒋倩,韩勇,孙晓丽,龚华,钱薇,陆国兴..离子色谱法和毛细管电泳法测定土壤中氯离子、硫酸根及其差异性[J].土壤,2016,48(2):343-348,6.基金项目
中国科学院知识创新工程领域前沿项目(12201415143200000)资助。 （12201415143200000）
