Foreword

This standard replaces GB 5009.93-2010 “National food safety standard Determination of selenium in foods”, GB/T 21729-2008 “Determination of selenium content in tea”, SN/T 0860-2000 “Method for the determination of selenium in canned mushroom for export-Fluorometry” and SN/T 0926-2000 “Method for the determination of selenium in tea for import and export-Fluorimetry.”

Compared with GB 5009.93-2010, the major changes of this standard are as follows:

——the hydride generation atomic fluorescence spectrometry has been retained as the method I and the fluorescence spectrophotometry has been retained as the method II;

——the inductively coupled plasma mass spectrometry has been added as the method III.