摘要
目的:测定大米中铅、镉、铬及镍元素的含量。方法:分别采用微波消解法和湿法快速消解法对样品进行消解处理,分析两种消解法的消解效果和对检测结果产生的影响。结果:微波和湿法快速消解两种方法测定值相近,铅、镉、铬和镍检出限分别为0.02 mg·kg^(-1)、0.002 mg·kg^(-1)、0.004 mg·kg^(-1)和0.003 mg·kg^(-1),回收率为96.36%~104.00%,相对标准偏差为4.57%~6.08%,两种方法对大米铅、镉、铬和镍元素的测定值均在标准范围内,且测定值无明显差异。结论:测定大米中铅、镉、铬及镍元素时,微波消解和湿法快速消解均可以作为电感耦合等离子体-质谱法的预处理方法。
Objective:To determine the contents of lead,cadmium,chromium and nickel in rice.Method:Microwave digestion and wet rapid digestion were used to digest the samples,and the digestion effects of the two digestion methods and their effects on the test results were analyzed.Result:The determination values of microwave and wet digestion methods were similar.The detection limits of lead,cadmium,chromium and nickel were 0.02 mg·kg^(-1),0.002 mg·kg^(-1),0.004 mg·kg^(-1) and 0.003 mg·kg^(-1),respectively.The recovery rate was 96.36%~104.00%,and the relative standard deviation was 4.57%~6.08%.The determination values of lead,cadmium,chromium and nickel in rice were within the standard range,and there was no signif icant difference between the two methods.Conclusion:Microwave digestion and wet rapid digestion can be used as pretreatment methods for ICP-MS in the determination of lead,cadmium,chromium and nickel in rice.
作者
姚丽君
YAO Lijun(Yingkou Testing Center for Food and Drug Control,Yingkou 115000,China)
出处
《食品安全导刊》
2024年第1期49-52,共4页
China Food Safety Magazine
关键词
微波消解
湿法快速消解
电感耦合等离子体-质谱法
大米
microwave digestion
wet fast digestion
inductively coupled plasma-mass spectrometry
rice
