密封循环吸收法快速测定水中痕量硫化物  

Rapid determination of trace sulfide in water by sealed and cycled absorption method

作　　者：刘通 陈晓芳 王占辉[3] 许雯[2] 陈士恒 LIU Tong;CHEN Xiaofang;WANG Zhanhui;XU Wen;CHEN Shiheng(Beijing STP Technology Co.Ltd.,Beijing 100084;Beijing Center for Physical and Chemical Analysis,Beijing 100089;Chengde Center for Disease Control and Prevention,Chengde 067000;Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149)

机构地区：[1]北京斯特普科技有限公司,北京100084 [2]北京市理化分析测试中心,北京100089 [3]承德市疾病预防控制中心,承德067000 [4]核工业北京化工冶金研究院,北京101149

出　　处：《分析试验室》2021年第10期1219-1222,共4页Chinese Journal of Analysis Laboratory

摘　　要：基于密封循环吸收技术,研制了水中硫化物快速样品前处理设备,可实现在常温,无氮气源条件下5 min内完成水中硫化物的快速分离和浓缩。结合亚甲蓝分光光度法检测,方法的定量限为5μg/L,检出限为2μg/L,加标回收率在94.3%~109.6%之间,相对标准偏差在4.0%~7.0%之间,测定范围为5~200μg/L。Based on the sealed and cycled absorption technique,a rapid sample pretreatment apparatus for sulfides in water was developed,which could realize rapid separation and concentrate of sulfides in water samples within 5 min at room temperature and without nitrogen source. Combined with methylene blue spectrophotometry,the limit of detection( LOD) of this method could be 2 μg/L for the sulfides,the limit of quantitate( LOQ) could be 5 μg/L,the recoveries were between 94. 3%-109. 6%,the relative standard deviations( RSDs) were4. 0%-7. 0%,and the linear range was 5-200 μg/L.

关 键 词：密封 循环吸收 硫化物 快速前处理 

分 类 号：O657.31[理学—分析化学] X832[理学—化学]