非离子表面活性剂增敏三元离子缔合物光度法测定微量银  

Spectrophotometric Determination of Trace Silver with Ternary Ion-association Complex Using Nonionic Surfactant as Sensitizer

作　　者：谢增春[1] 杭义萍[1] 陈楠[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《分析科学学报》2010年第5期608-610,共3页Journal of Analytical Science

基　　金：华南理工大学国家大学生创新性实验计划(No.081056120)

摘　　要：研究并建立了非离子表面活性剂聚乙二醇辛基苯基醚(Tx-100)胶束增敏离子缔合物分光光度法测定微量银的分析方法。实验结果表明,在表面活性剂存在下,方法的灵敏度比未增敏体系提高了近5倍,络合物稳定性也大大增加。方法的最佳酸度是pH=4.0,银浓度在0～0.4mg·mL-1符合比耳定律。以EDTA为掩蔽剂,只有Br-、I-、CN-、S2-有干扰。方法用于人工合成样品和显影废液中微量银的分析,准确度和精密度令人满意。A spectrophotometric method for the determination of trace silver using nonionic surfactant of polyethylene glycol octylphenyl ether（Tx-100）as sensitizer has been established.In the presence of Tx-100 micellar,the sensitivity was increased by five times than that in the aqueous media,and the complex becomes more stable.The optimum pH value is 4.0,Lambert-Beer law is obeyed in the range of 0~0.4 mg5L-1 silver.In the presence of EDTA,only Br-,I-,CN-and S2-cause interference.The method was successfully applied to the detection of silver in the synthetic sample and waste water with satisfactory results.

关 键 词：银 三元离子缔合物 非离子表面活性剂 临界胶束浓度 胶束增溶 

分 类 号：O657.3[理学—分析化学]