反向流动注射化学发光法测定痕量硫离子  

Determination of Trace Sulfide by a Reverse Flow Injection with Chemiluminescence Detection

作　　者：游水英[1] 周光明[1] 沈祥[1] 黄成[1] 王莉[1] 

机构地区：[1]西南大学化学化工学院,重庆400715

出　　处：《分析科学学报》2005年第5期517-519,共3页Journal of Analytical Science

基　　金：重庆市自然科学基金(CSTC-2004BB7087)

摘　　要：在碱性条件下,基于硫离子对鲁米诺和高碘酸钾化学发光反应有很强的增敏作用,建立了反向流动注射化学发光法检测水中痕量硫离子的新方法.在优化实验条件下,硫离子浓度在8.0×10-10～5.0×10-6g/mL范围内与发光强度呈良好的线性关系;检出限(3σ)为2.0×10-10g/mL;相对标准偏差为2.3%(n=11,1.0×10-8g/mLS2-).该方法用于环境水样中S2-的测定,结果令人满意.A new reverse flow-injection chemiluminescence method for the determination of trace amounts of sulfide was developed. It is based on the enhancement of sulfide on the chemiluminescence reaction of KIO4 with Luminol. The relationship between the chemiluminescence intensity and the concentration of sulfide is linear in the range of 8.0 × 10^-10-5.0 × 10^-6 g/mL. The detection limit is 2.0 × 10^-10g/mL with the relative standard deviation 2.3% （n=11 ,c=1.0 × 10^-8g/mL）. The method has been applied to the determination of sulfide in water with satisfactory results.

关 键 词：反向流动注射 化学发光 硫离子 高碘酸钾 

分 类 号：O657.39[理学—分析化学] O613.51[理学—化学]