摘要
优化了在表面活性剂存在下以肉桂基荧光酮同时测定铝、铜、锰、锌、钴的显色折衷条件;比较研究了偏最小二乘、岭回归、多元线性回归、多元逐步回归、目标因子分析和卡尔曼滤波法用于这一体系同时测定此5组分的优缺点,结果表明对于此类所含各组分吸收光谱重叠严重且吸光度加和性欠佳体系,上述6法中以偏最小二乘和岭回归法为最适宜;经用于九种人工合成液和四种食品分析,均获满意结果,分析两种茶叶结果也与ICP-AES法一致。
The necessary compromise conditions for the coloration of all of the aluminum, copper, manganese, zinc and cobalt ions using cinnamic fluorone(2,6,7-trihydroxy-9-styryl -fluorone-3) in the presence of surfactant for their simultaneous determination have been op-timized. And comparison of the six chemometrics methods(i. e. partial least-squares, ridge regression, multiple linear regression, multiple stepwise regression, target factor analysis, Kalman filtering) with above color systems for the simultaneous determination of the cited five cations have been carried out. Of the six chemometrics methods, partial least-squares and ridge regression methods are well suitable for the mixtures, in which the absorption spectra of the five colored complexes and surplus chromogenic agent overlap seriously one another and the additivity of their absorbances is poor. The two chemometrics methods have been satisfactorily applied to the analysis of nine synthetic mixtures and four types of food. The results of determining two kinds of Chinese tea samples agree with those obtained by ICP-AES.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1994年第3期265-271,共7页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金资助课题
关键词
化学计量学
偏最小二乘
食品分析
Chemometrics, Partial least-squares, Ridge regression, Simultaneous determi-nation, Food analysis, Cinnamic fluorone.
