用偶合反应流动注射化学发光法测定矿样和水样中的痕量铊  

Determination of thallium in ore and wastewater samples by flow injection/coupled chemiluminescence reaction

作　　者：吴志皓[1] 李桂敏[1] 王金中[1] 刘快之[1] 刘绣华[1] 范顺利[2] 

机构地区：[1]河南大学化学化工学院,开封475001 [2]中国科学院生态研究所,北京100085

出　　处：《分析试验室》2006年第2期4-6,共3页Chinese Journal of Analysis Laboratory

摘　　要：将Tl（Ⅲ）置换Co（Ⅱ）-EDTA配合物中的Co（Ⅱ）与Co（Ⅱ）-鲁米诺-H2O2化学发光体系相偶合,建立了流动注射化学发光测定铊的新方法.本方法测定铊的线性范围为3.0×10^-6～1.0×10^-2mg/mL,检出限为1.0×10^-6mg/mL.对1.0×10^-4mg/mL的Tl（Ⅲ）标准溶液连续11次测定的相对标准偏差为2.方法可用于矿样和水样中铊的测定.A new method for the determination of thallium is proposed by flow injection/coupled chemiluminesence reaction, which is based on the replacement of Co（Ⅱ） by Tl（Ⅲ） from Co（Ⅱ） - EDTA complex and the subsequent CL reaetion of 鲁米诺 - HO2 - Co（Ⅱ）. The linear range for the determination of TI（Ⅲ） is 3.0 × 10^-6 - 1.0 × 10^-2 mg/mL. The relative standard deviation is 2.0% for 11 measurements of 1.0 × 10^-4 mg/mL TI（Ⅲ） standard solution and the detection limit is 1.0 × 10^-6 mg/mL. The method has been used to determine thallium in ore and wastewater samples.

关 键 词：偶合反应 流动注射 化学发光 铊 

分 类 号：O657.32[理学—分析化学]