| 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 |
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| 引用本文： | 谢增春,杭义萍,陈楠.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[J].分析科学学报,2010,26(5). |
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| 作者姓名： | 谢增春 杭义萍 陈楠 |
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| 作者单位： | 华南理工大学化学与化工学院,广东广州,510640 |
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| 基金项目： | 华南理工大学国家大学生创新性实验计划 |
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| 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。
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| 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 |
Spectrophotometric Determination of Trace Silver with Ternary Ion-association Complex Using Nonionic Surfactant as Sensitizer |
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| XIE Zeng-chun,HANG Yi-ping,CHEN Nan.Spectrophotometric Determination of Trace Silver with Ternary Ion-association Complex Using Nonionic Surfactant as Sensitizer[J].Journal of Analytical Science,2010,26(5). |
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| Authors: | XIE Zeng-chun HANG Yi-ping CHEN Nan |
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| Institution: | XIE Zeng-chun,HANG Yi-ping,CHEN Nan(College of Chemistry and Chemical Engineering,South China Universityof Technology,Guangzhou 510640) |
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| Abstract: | 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... |
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| Keywords: | Silver Ternary ion-association complex Nonionic surfactant Critical micellar concentration Micellar solubilization |
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