离子色谱法测定水利工程水样中Cl^-和SO_4^(2-)的含量  

IC Determination of Cl^- and SO_4^(2-) in Water Samples of Hydraulic Engineering

作　　者：张科[1] 冯引弟[2] 刘守伟[1] 杨晓龙[1] 付会成 孙乙庭[1] 马云飞[1] 刘双英[1] 马琢琪 

机构地区：[1]吉林省水利水电勘测设计研究院科学试验研究院,长春130012 [2]长春市农业科学院玉米所,长春130111

出　　处：《理化检验（化学分册）》2017年第5期607-610,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：全球环境基金资助项目(4632)

摘　　要：取水利工程水样过滤后,以TSKgel IC-Anion-PWXL PEEK阴离子柱为分离柱,以2.5mmol·L^(-1)四硼酸钠溶液(用乙二胺调节其酸度至pH 10.5)为淋洗液进行离子色谱分离,用非抑制型电导检测器进行测定。Cl^-和SO_4^(2-) 的质量浓度均在2.50~50.00mg·L^(-1)内与其对应的峰面积呈线性关系,Cl^-和SO_4^(2-) 的检出限(3S/N)依次为5.1,7.6μg·L^(-1)。对空白水样连续测定5次,Cl^-和SO_4^(2-) 的峰面积的相对标准偏差依次为4.1%,2.3%。测得加标回收率在97.9%~102%之间。Water sample of hydraulic engineering was filtered, and separated by IC, using TSKgel IC-Anion- PWXL PEEK anionic column as separation column, and 2.5 mmol ·L^-1 sodium tetraborate solution （pre-adjusted to pH 10. 5 with ethylenediamine） as eluant. Non-restrain conductance detector was used in the determination. Linear relationships between values of peak area and mass concentration of Cl^- and SO4^2- were kept in the same range of 2.50-50. 00 mg·L^-1 , with detection limits （3S/N） of 5. 1, 7. 6 μg·L^-1 respectively. Precision of the method was tested with blank water sample for 5 determinations, values of RSD＇s （in terms of peak area） found for Cl^- and SO4^2- were 4. 1% and 2.3 %, respectively. Values of recovery found by standard addition method were in the range of 97.9%-102%.

关 键 词：离子色谱法 水利工程水样 Cl^- SO4^2- 

分 类 号：O657.7[理学—分析化学]