Tang Bo, Chen Zhen-Zhen, Zhang Ning, Zhang Jie, Wang Yan
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China.
Talanta. 2006 Jan 15;68(3):575-80. doi: 10.1016/j.talanta.2005.04.070. Epub 2005 Jun 6.
A novel host inclusion complex of cross-linking-polymeric-beta-cyclodextrin-o-vanillin furfuralhydrazone (beta-CDP-OVFH) was synthesized and characterized with IR and (1)H NMR spectra to confirm its structure. A highly selective and sensitive fluorescent determination of trace amounts of gallium was proposed based on the reaction between Ga(3+) with beta-CDP-OVFH in acetic acid-ammonium acetate buffer medium of pH 4.10. The maximum excitation and emission wavelengths were 392 and 499 nm, respectively. The linear range of this method was 1.5-330 ng ml(-1) with a detection limit of 0.44 ng ml(-1). The effect of interferences in the determination of gallium was investigated and the results showed that the same race elements such as Al(3+) and In(3+) did not interfere the determination of Ga(3+) even when their concentration is 100 times of Ga(3+), the host reagent had quite high capacity of identifying Ga(3+). This method was successfully applied to the determination of trace amounts of Ga(3+) in artificial and semiconductor samples.
合成了一种新型的交联聚合β-环糊精-邻香草醛糠腙（β-CDP-OVFH）主体包合物，并用红外光谱和（1）H核磁共振光谱对其进行了表征以确认其结构。基于Ga(3+)与β-CDP-OVFH在pH 4.10的乙酸-乙酸铵缓冲介质中的反应，提出了一种高选择性和灵敏的荧光法测定痕量镓。最大激发波长和发射波长分别为392和499nm。该方法的线性范围为1.5 - 330 ng ml(-1)，检测限为0.44 ng ml(-1)。考察了镓测定中干扰物的影响，结果表明，Al(3+)和In(3+)等同族元素即使浓度为Ga(3+)的100倍也不干扰Ga(3+)的测定，主体试剂对Ga(3+)具有相当高的识别能力。该方法成功应用于人工样品和半导体样品中痕量Ga(3+)的测定。
