Abstract: A method for deterrnination of saccharin sodium in food by Fluorscenecs Quenching Thin Layer Scanning has been studied. The lowest detectability was 0. 6ug. A good liner relation was obtained in the range of 0. 6～18ug. r = 0. 9995. The recovery rate were 90. 0% ~ 101. 9% the conffcient of variation were 1. 9%～3. 3 %. The saccharin sodium contents of 30 foods in Guangzhou were determined by this methed.

Key words: TCL Scanning Saccharin sodium Food