Determination of Cadmium in Brown Rice by Flame AtomicAbsorption Spectrometry

Introduction

The standard for cadmium in rice based on Japan's Food Sanitation Act has been strengthened, with the allowable concentration revised downward from 1.0 mg/kg or less to a maximum of 0.4 mg/kg according to the Ministry of Health, Labour and Welfare Notification No. 183 (April 8, 2010). The revised standard will take effect on February 28, 2011. Up to now, this type of restriction was applied only to brown rice, but polished rice is now included in this revision. Here we introduce examples of analysis of cadmium in standard reference materials of powdered brown rice (NIES No.10-a,-b) using the typical flame AA method, in addition to a high-sensitivity method using an atom booster.

December 1, 2010 GMT