【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。更多还原

【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.更多还原