| 二溴羟基苯基荧光酮荧光熄灭法测定铜 |
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| 引用本文： | 付佩玉,曹伟,高红亮. 二溴羟基苯基荧光酮荧光熄灭法测定铜[J]. 光谱学与光谱分析, 2000, 20(1): 99-101 |
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| 作者姓名： | 付佩玉 曹伟 高红亮 |
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| 作者单位： | 山东建材工业学院应用化学系,250022,济南;山东建材工业学院应用化学系,250022,济南;山东建材工业学院应用化学系,250022,济南 |
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| 基金项目： | 山东省自然科学基金资助项目 |
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| 摘 要： | 研究了在pH 6 2～ 8 2磷酸二氢钾 磷酸氢二钠缓冲体系中 ,非离子表面活性剂TritonX 10 0存在下 ,铜 (Ⅱ )与二溴羟基苯基荧光酮 (DBH PF)形成 1∶2红色三元混配合物而使荧光熄灭 ,建立了荧光熄灭法测定铜的新方法。配合物的λex=5 3 0nm ,λem=5 60nm ,含量在 0～ 80 μg·L-1范围内有良好的线性关系 ,检测限为 0 2 μg·L-1。体系的灵敏度高 ,选择性好。Al(Ⅲ )、Fe(Ⅲ )、Ti(Ⅳ )的干扰 ,可用氟化钠、苦杏仁酸掩蔽。方法快速简便 ,用于人发、茶叶及水中微量铜的测定与AAS相符 ,RSD(n=5 ) <6 9% ,回收率在 98%～ 10 4 %之间。
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| 关 键 词： | 铜 荧光熄灭法 二溴羟基苯基荧光酮(DBH-PF) |
Fluorescence Quenching Method for the Determination of Trace Copper with DBH-PF |
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| Peiyu FU,Wei CAO,Hongliang GAO. Fluorescence Quenching Method for the Determination of Trace Copper with DBH-PF[J]. Spectroscopy and Spectral Analysis, 2000, 20(1): 99-101 |
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| Authors: | Peiyu FU Wei CAO Hongliang GAO |
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| Affiliation: | Department of Applied Chemistry, SIBM, 250022 Jinan. |
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| Abstract: | A fluorescence quenching method for the determination of trace Cu(II) was developed. The method was based on the fluorescence quenching effect of DBH-PF and Triton X-100 due to the formation of a non-fluorescent ternary complex in pH 6.2-8.2 KH2PO4-Na2HPO4 medium. The excitation and emission wavelengths are 530 and 560 nm, respectively. The linear range is 0-80 micrograms.L-1 and the detection limit is 0.20 microgram.L-1 for Cu(II). The method has been used to determine trace amounts of Cu(II) in hair, tea and water. The recovery is 98%-104%, and the relative standard deviation is less than 6.9% with satisfactory results. |
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| Keywords: | Copper Fluorescence quenching method 2 3 7 trihydroxy 9 dibromo hydroxypheny lfluorone(DBH PF) |
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