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

• 分析检测 • 上一篇    下一篇

微波消解-等离子体原子发射光谱法测定8种粮食中7种金属元素含量

张玉芬1,于秀英2,齐景凯3   

  1. 1.内蒙古民族大学分析测试中心,内蒙古 通辽 028043;2.内蒙古民族大学农学院,内蒙古 通辽 028043;3.内蒙古民族大学生命科学学院,内蒙古 通辽 028043
  • 收稿日期:2011-09-20 修回日期:2012-10-29 出版日期:2012-12-25 发布日期:2012-12-12
  • 通讯作者: 张玉芬 E-mail:qikzhyf@126.com

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. 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

摘要: 采用浓硝酸-双氧水(5:1,V/V)为溶样试剂,以微波消解和电感耦合等离子体原子发射光谱法联用,同时测定8种粮食中的汞、铅、镉、砷、铜、锡和铝7种金属元素的含量。结果表明,在最佳实验条件下,0.5g粮食中各元素的加标回收率在96.85%~107.16%之间,RSD在0.96%~3.64%之间,检出限介于2.04~14.09µg/L。该方法简便、迅速、准确度和精密度高,适用于粮食中这7种金属元素含量的同时测定。

关键词: 粮食, 微波消解, 电感耦合等离子体发射光谱法, 元素分析

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

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