Determination of Seven Metal Elements in Eight Cereal Grains by Microwave Digestion Coupled with ICP-AES

doi:10.7506/spkx1002-6630-201224059

FOOD SCIENCE ›› 2012, Vol. 33 ›› Issue (24): 280-282.doi: 10.7506/spkx1002-6630-201224059

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Determination of Seven Metal Elements in Eight Cereal Grains by Microwave Digestion Coupled with ICP-AES

ZHANG Yu-fen1，YU Xiu-ying2，QI Jing-kai3

1. Center of Analysis, Inner Mongolia University of Nationalities, Tongliao 028043, China；2. College of Agriculture, Inner Mongolia University of Nationalities, Tongliao 028043, China；3. College of Life Science, Inner Mongolia University of Nationalities, Tongliao 028043, China

Received:2011-09-20 Revised:2012-10-29 Online:2012-12-25 Published:2012-12-12

Abstract

Abstract: The contents of Hg, Pb, Cd, As, Cu, Sn and Al in 8 cereal grains were simultaneously determined by ICP-AES after microwave digestion with HNO3-H2O2 (5:1, V/V). Under optimum conditions, average spike recoveries of all the metal elements in 0.5 g of rice ranged from 96.85% to 107.16%, with RSDs between 0.96% and 3.64%. The limits of detection of this method for them ranged from 2.04 µg/L to 14.09 µg/L. This method was simple, quick, accurate, precise and suitable for the simultaneous determination of these elements in cereal grains.

Key words: cereal grains, microwave digestion, inductively coupled plasma atomic emission spectrometry, element analysis

CLC Number:

O651

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Determination of Seven Metal Elements in Eight Cereal Grains by Microwave Digestion Coupled with ICP-AES

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