摘要
研究了SPAEC荧光螯合反应并结合卡尔曼滤波校正的高灵敏度高选择性荧光分析法.在荧光分析中首次用卡尔曼滤波以分辨铝、镓与SPAEC螯合物的重叠峰;提出了适于荧光分析的几种滤波方式,并讨论了各自的特点.该法用于铝与镓(1:40～14:1)混合物分析,改善了灵敏荧光法(及试剂)的选择性.
A new fluorescent reagent, SPAEC, synthesized in our laboratory, has been used for determination of micro gallium and aluminum at optimal pH from 3. 8 or 4. 0 to 5. 5 with λex/λex being 515/580 or 535(520)/575 nm, respectively. When the two ions coexist, they will behave as a mutual interference. Kalman filter, an important tool of chemometrics, is a first order recursive optimal filter for estimating true signal in the presence of noise and an effective mathematical algorithm in data-processing of analytical chemistry. Kalman filtering spectrofluorimetry was applied to resolution of the overlapping fluorescence peaks of aluminum and gallium chelating with SPAEC at pH 4. 5 through some modes covering: (1) all peak scanning filtering, (2) selective scaning filtering and (3) sim-plized scanning filtering. The developed method was used for analysis of Al/Ga(1: 40-14 : 1) mixtures and considerably improved the selectivity of a high sensitive fluorimetric method showing a good prospect for trace analysis.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第1期16-20,共5页
Chemical Journal of Chinese Universities
基金
国家教育委员会与自然科学基金
关键词
卡尔曼滤波
荧光分析
铝
镓
测定
Fluorescent reagent SPAEC, Fluorescent chelate, Kalman filtering spectrofluorimetry, Fluorescent analysis of aluminum and gullium, Simultaneous determination of aluminum and gullium
