导数光谱——主成分回归紫外分光光度法同时测定三种食品添加剂  

Simultaneous Determination of Three Food Additives by Derivative Spectrum Principal Component Regression Ultravioloet Spectrophotometry

作　　者：戈早川[1] 周建明[1] 王庆延[1] 倪永年[2] 

机构地区：[1]江西医学院卫生化学教研室 [2]南昌大学分析化学教研室

出　　处：《江西医学院学报》1998年第2期9-11,共3页Acta Academiae Medicinae Jiangxi

基　　金：江西省青年科学基金

摘　　要：糖精钠、苯甲酸和山梨酸的导数光谱彼此严重重叠，未经分离无法作单一成分分析。本文用主成分回归法处理重叠的导数光谱，同时测定了饮料中的糖精钠、苯甲酸和山梨酸，相对标准偏差分别为１．９４％～４．０３％、１．１２％～３．２５％和０．８９％～２．６３％，平均回收率分别为１０５．２％、１０２．６％和９７．５％。The derivative spectrum of saccharin sodium,benzoic acid and sorbic acid were seriously overlapping,so they can not be determined individually by spectrophotometry without prior separation.In this paper,overlapping derivative spectrum were processed with principal component regression.It was applied to the simultaneous determination of saccharin sodium,benzoic acid and sorbic acid in drinks with RSD of 1.94%￣4.03%,1.12%￣3.25% and 0.89%￣2.63% respectively and average recoveries of 105.2%,102.6% and 97.5% respectively.

关 键 词：光度测定法 糖精 导数光谱 食品添加剂 苯甲酸盐类 山梨酸 

分 类 号：R155.5[医药卫生—营养与食品卫生学]