摘要
建立微波消解-ICP-MS测定稻谷中镉的方法,利用石墨炉原子吸收分光光度计比对分析。样品加5 mL硝酸、1 mL双氧水经185℃微波消解后,分别用ICP-MS和石墨炉原子吸收分光光度计检测,根据测试结果评价2016年秋季收获期常州稻谷的镉污染情况。结果表明:该方法在0~2.0μg/L质量浓度范围内线性关系良好(r>0.999),在0.01μg、0.02μg、0.03μg、0.04μg添加水平时的平均回收率在96.50~102.12%范围内,测定结果的相对标准偏差在0.22%~0.46%(n=4)范围内,检出限为0.002 3μg/L;2016年秋季常州地区稻谷镉含量未见超标。该方法简便、结果稳定可靠,适合于大批量稻谷中镉含量的快速测定。
A method for the determination of Cd in paddy by using inductively coupled plasma mass spectrometer（ICP-MS）with microwave digestion was established,which was compared by graphite furnace atomic absorption spectrometry.When the detection conditions were obtained as follows：5 mL HNO3 and 1 mL H2 O2 were taken as digestion liquid for digesting by microwave in185℃,tested by ICP-MS and GFAAS,and then used to assess the Cd infection conditions of paddy in Changzhou,2016.The linear range of the developed method is 0-2.0μg/L,and the detection limit is 0.002 3μg/L.The relative standard deviations of determination results are 0.22%-0.46%（n=4）.The average recovery rates are 96.50%-102.12%.The content of Cd in paddy is not exceeding the standard in Changzhou city,autumn,2016.This method is simple,accurate,sensitive and suitable for the determination of Cd in paddy.
作者
陈军
耿成钢
Chen Jun;Geng Chenggang(Supervision and Examination Station of Grain and Oil Products Quality of Changzhou City（Changzhou 213300)
出处
《粮食与食品工业》
2018年第3期67-72,共6页
Cereal & Food Industry
关键词
稻谷
ICP-MS
石墨炉原子吸收光谱法
镉
微波消解
paddy
inductively coupled plasma mass spectrometer
GFAAS
cadmium
microwave digestion
