高效离子色谱脉冲安培法同时测定饮用水中痕量硫化物及氰化物  

Determination of trace sulfur ions and cyanogen in drinking water by high performance ion chromatography pulsed amperometry

作　　者：杨海毅 肖凯青 陈洁 吴国权 YANG Haiyi;XIAO Kaiqing;CHEN Jie;WU Guoquan(Qiandongnan Kaili Ecological Environment Monitoring Center,Kaili,556000,China;Thermo Fisher Scientific,Guangzhou,510800,China)

机构地区：[1]贵州省黔东南凯里生态环境监测中心,凯里556000 [2]赛默飞世尔科技(中国)有限公司,广州510800

出　　处：《环境化学》2023年第8期2856-2858,共3页Environmental Chemistry

摘　　要：本文建立同时分析饮用水中痕量硫化物及氰化物方法,优化后的离子色谱条件:Thermo Scientific Dionex IonPac TM AS7(2 mm×250 mm,Analytical),100 mmol·L^(−1) NaOH-250 mmol·L^(−1) NaAc为淋洗液,流速0.3 mL·min^(−1),柱温30℃,工作电极为Ag金电极,参比电极为Ag/AgCl参比电极,波形:S/CN标准电位波形,检测器箱温控30℃.结果表明,采用该方法、稳定性良好,连续进样5针,RSD均小于0.28%;标曲线性关系良好,R≥0.9992;方法灵敏度高,硫化物0.05μg·L−1,氰化物0.16μg·L^(−1),检测结果准确,加标回收均大于91.2%,故本方法适用于饮用水中硫离子及氰根定量分析.A method for simultaneous analysis of trace sulfur ions and cyanogen in drinking water has been developed.Optimized ion chromatography conditions:Thermo Scientific Dionex IonPac TM AS7(2 mm×250 mm,Analytical),100 mmol·L^(−1) NaOH-250 mmol·L^(−1) NaAc as eluvial solution,Flow rate 0.3 mL·min^(−1),column temperature 30℃,working electrode:Ag gold electrode,reference electrode:Ag/AgCl reference electrode,waveform:S/CN standard potential waveform,detector box temperature control 30℃.The results showed that the method had good stability and RSD were all less than 0.28% after 5 consecutive injections.The relationship between the standard curve is good,R≥0.9992;The method has high sensitivity,S^(2−):0.05μg·L^(−1),CN−:0.16μg·L^(−1),accurate detection results,the recovery of low,middle and high levels of labeling is more than 91.2%,so the method is suitable for quantitative analysis of sulfur ion and cyanide in drinking water.

关 键 词：离子色谱 硫化物 氰根 

分 类 号：TU991.21[建筑科学—市政工程]