摘要
本文研究了荧光新试剂水杨醛异烟酰腙与镓的荧光反应,用紫外光谱法测定了试剂离解常数。在此荧光体系中,荧光配合物λ_(ex)=395nm、λ_(em)=480nm。在pH3.8、60％(V/V)乙醇介质中,测定的线性范围为0～1.0 μg/10mL,方法灵敏度为4×10^(-4)ppm。用荧光法测定了配合物的组成比及表观稳定常数。建立了镓的新荧光光度法,将其用于地质样品分析,精密度和准确度良好。
The fluorimetric reaction of salicylaldehyde isonicotinylhydrazone with gallium has been studied. The constants for dissociation of the reagent were established. The fluorescence excitation and emission wavelengths of the complex of gallium with the reagent are 395 nm and 480 nm, respectively. The sensitivity of the method is 4. 0×10-4 ppm. The linear range is 0-1.0 μg/10 mL. The molar ratio of gallium to reagent was found to be 1 : 1. The proposed mathod has been used for the determination of trace gallium in geologic samples with satisfactory results.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第3期311-314,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
镓
水杨醛
异烟酰腙
荧光分析
Gallium, Salicylaldehyde isonicotinylhydrazone, Fluorimetry
