| 四(4-三甲铵苯基)卟啉荧光熄灭法测定痕量镉(Ⅱ) |
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| 引用本文： | 潘祖亭,徐勉懿,李佳. 四(4-三甲铵苯基)卟啉荧光熄灭法测定痕量镉(Ⅱ)[J]. 高等学校化学学报, 1992, 13(4): 462 |
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| 作者姓名： | 潘祖亭 徐勉懿 李佳 |
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| 作者单位： | 武汉大学化学系, 武汉, 430072 |
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| 摘 要： | 利用TPPS4催化动力学荧光测定痕量镉(Ⅱ)已有报道[1],而利用四(4-三甲铵苯基)卟啉(TAPP)的荧光熄灭测定痕量镉(Ⅱ)的工作尚未见报道.本文研究了室温下Cd(Ⅱ)-TAPP反应体系的荧光光谱特性,发现Cd(Ⅱ)-TAPP的形成使TAPP的荧光发生静态熄灭.利用咪唑(Imid)、十二烷基硫酸钠(SDS)和乙醇增敏、增稳,最低可检测3×10-4ppmCd(Ⅱ),灵敏度高于其它方法[2].测定了胶印锌片和人发中的镉,结果与标准值或方法对照值吻合.
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| 关 键 词： | 四(4-三甲铵苯基)卟啉 镉 荧光熄灭法 |
| 收稿时间： | 1991-01-29 |
Fluorescence Quenching Method for Determination of Trace Cadmium with Meso-Tetrakis-(Trimethylammoniumphenyl) Porphyrin |
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| PAN Zu-ting,XU Mian-yi,LI Jia. Fluorescence Quenching Method for Determination of Trace Cadmium with Meso-Tetrakis-(Trimethylammoniumphenyl) Porphyrin[J]. Chemical Research In Chinese Universities, 1992, 13(4): 462 |
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| Authors: | PAN Zu-ting XU Mian-yi LI Jia |
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| Affiliation: | Department of Chemistry, Wuhan University, Wuhan, 430072 |
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| Abstract: | A fluorescence quenching method for determination of trace cadmium(Ⅱ) with meso-tetrakis-(trimethylammoniumphenyl) porphyrin in the presence of anionic surfactant (sodium lauryl sulfate, SDS) was studied.The maximum excitation appears at 415 nm with fluorescence occuring at 650 nm.The limit of detection is 3×10-4 ppm Cd(Ⅱ).Seven replicate determinations of solutions containing 0.20 μg Cd(Ⅱ) show a relative standard deviation of 4.1%. |
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| Keywords: | Meso-tetrakis-(trimethylammoniumphenyl) porphyrin Cadmium Fluorescence quenching method |
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