盐酸溶液浸提-离子色谱法测定中溶盐石膏的含量  

Determination of dissolved salt gypsum by ion chromatography with hydrochloric acid solution extraction

作　　者：贾亮亮 董凌云 郝兴华 JIA Liang-liang;DONG Ling-yun;HAO Xing-hua(Institute of Hydrology and Engineering Geological Prospecting Hebei Province,Shijiazhuang 050021,China;Baoding University,Baoding 071000,China)

机构地区：[1]河北省水文工程地质勘查院,河北石家庄050021 [2]保定学院,河北保定071000

出　　处：《化学工程师》2024年第2期24-26,共3页Chemical Engineer

基　　金：2021年河北省地方标准制修订项目(GY202102)。

摘　　要：为更好地服务水利水电工程、岩土工程等行业土料勘察工作,建立了盐酸溶液浸提-离子色谱法测定中溶盐石膏(CaSO_(4)·2H_(2)O)含量的新方法。实验采用4.5m M Na_(2)CO_(3)/1.4m M Na HCO_(3)淋洗液,在1.0m L·min^(-1)流速下对硫酸盐进行测定,测定方法的相对标准偏差(RSD)为2.3%,加标回收率为91.0%~102%,检出限为0.003g·kg^(-1)。该方法操作简单、高效、准确度高,适用于工程勘察中大批量样品的测定。In order to better serve the soil investigation work in water conservancy and hydropower engineering,geotechnical engineering and other industries,a new method for the determination of dissolved salt gypsum(CaSO_(4)·2H_(2)O)was established by ion chromatography with hydrochloric acid solution extraction.Sulfate was determined with 4.5mM Na_(2)CO_(3)/1.4mM NaHCO_(3)eluent at a flow rate of 1.0mL·min^(-1).The relative standard deviation(RSD)of the method was 2.3%,the recovery was 91.0%~102%,and the detection limit was 0.003g·kg^(-1).This method was simple,high sensitivity and accuracy,and was suitable for the determination of large quantities of samples in engineering investigation.

关 键 词：盐酸溶液 离子色谱法 中溶盐石膏 工程 

分 类 号：O657.75[理学—分析化学]