Study on the new fluorescence enhancement system of Tb-N-(2-pyridinyl) ketoacetamide-Et3N-Zn and its application

被引：3

作者：

Dang, Fangfang ^{[1
]}

Liu, Weisheng

Zheng, Jiangrong

机构：

[1] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF FLUORESCENCE | 2007年 / 17卷 / 01期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

N-(2-pyridinyl) ketoacetamide; triethylamine; terbium (III); zinc (II); fluorescence enhancement; methanol;

D O I：

10.1007/s10895-006-0139-z

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A sensitive fluorescence enhancement system was developed for the determination of zinc (II). The fluorescence intensity of the Tb- N- (2 - Pyridinyl) ketoacetamide (PKA) system was greatly enhanced by the addition of triethylamine (Et3N) and zinc nitrate in the methanol solution. The excitation and emission wavelengths were 329 nm and 546 nm, respectively. Under optimal conditions, the fluorescence intensities varied linearly with the concentration of Zn2+ in the range of 8.0x10(-7)-5.0x10(-6) M with a detection limit of 9.9x10(-8) M. The interferences of some substances were described. This method was applied to the determination of amounts of Zn2+ in soybean, rice, and wheat, respectively. The results showed that the proposed procedure is a high selective, simple, and rapid method to the determination of Zn2+ ion. The mechanism of fluorescence enhancement was also studied.

引用

页码：89 / 95

页数：7

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