双波长扫描法测定饮料中的糖精钠

DUAL-WAVELENGTH SCANNING DETERMINATION OF SACCHARIN IN DRINKABLES SACCHARININDRIMABLES

本文采用双波长紫外扫描法测定饮料中糖精钠的含量。样品经乙醚提取，用展开剂三氯甲烷：丙酮：甲酸（９：３：０．１）展开，用岛津ＣＳ—９３０型双波长薄层扫描仪λＳ＝２２５ｎｍ，λＲ＝３５０ｎｍ时进行扫描，本法灵敏、准确、简便，用样量少，便于掌握，回收率为９３．７％～１０４．６％。

A method is reported for the detection and analysis of saccharin concentration indrinkables by dual-wavelength UV scan. The samples were extracted with ether,de-veloped with chloroform:acetone:formic acid(9:3:0.1),the plate was scanned atλs=225 nm,λR=330 nm in a Shimadzu dual wavelength thin-layer chromato scanner model CS-930,The method was simple and accurate, easy to master,andthe recovery was 93.7%～104.6%.