微波消解-原子荧光光谱法测定陕北黄蒿界大米中的总砷  

Determination of Arsenicin in Rice of Huang Hao Jie in Northern Shaanxi by Microwave Digestion-Atomic Fluorescence Spectrometry

作　　者：刘永瑞 胡冬 LIU Yongrui;HU Dong(Yuyang Food Inspection and Testing Center,719000 Yulin Shaanxi,China;Jingbian County Establishment of Real-Name Management Service Centre,718500 Jingbian Shaanxi,China)

机构地区：[1]榆林市榆阳区市场抽检快检服务中心,陕西榆林719000 [2]榆林市靖边县机构编制实名制管理服务中心,陕西靖边718500

出　　处：《粮食加工》2024年第6期103-106,共4页Grain Processing

摘　　要：依据食品安全国家标准GB 5009.11—2014(食品中总砷及无机砷的测定)第一篇第二法,采用氢化物发生原子荧光光谱法,样品分别经微波消解和湿法消解处理后,利用北京海光AFS-9700型全自动双道注射式氢化物发生原子荧光光度计,对陕北黄蒿界大米中的总砷进行测定。结果显示,当总砷含量为0~30 ng/mL时,线性关系良好,相关系数为0.9999。微波消解法处理后加标回收率为80.0%~98.6%,相对标准偏差(RSD)为0.32%~0.65%;而湿法消解后加标回收率为69.0%~82.5%,相对标准偏差(RSD)为2.43%~3.22%。相比食品安全国家标准GB 5009.11—2014(食品中总砷及无机砷的测定)第一篇第二法中湿法消解,微波消解具有操作简单、快速安全、仪器自动化程序高;耗酸量少、试剂污染小等优点,且使用该方法检测结果准确度高、平行样品间精密度较好、回收率高,可用于陕北黄蒿界大米中总砷的测定。According to the National Food Safety Standard GB 5009.11—2014(Determination of total arsenic and inorganic arsenic in food),the samples were treated by wet digestion and microwave digestion,the contents of as in rice of Huang Hao Jie were determined by automatic injection pump atomic fluorescence spectropho-tometer AFS-9700 of Beijing Hai Guang.The result showed that linear range of response was in the range from 0 to 30.0 ng/mL,correlative coefficient of linear regression equation was 0.9999,the relative standard deviation(RSD)of microwave digestion method was 0.32%~0.65%and the recoveries were in the range from 80.0%to 98.6%,which all meet the requirements of Appendix F in GB/T 27404—2008.The recoveries of wet digestion method were in the range from 69.0%to 82.5%and the relative standard deviation(RSD)was 2.43%~3.22%.Compared with the wet digestion method of sample digestion in the second method of total arsenic in GB 5009.11—2014,the microwave digestion method has the advantages of high instrument automation program,sim-ple,fast and safe pretreatment operation,less acid consumption,single type,less reagent pollution,large batch processing,high accuracy of detection results,good precision between parallel samples and high recovery rate.So,it can be used for the determination of total arsenic in Artemisia rice in northern Shaanxi Province.

关 键 词：微波消解 原子荧光光谱法 黄蒿界大米 总砷 

分 类 号：TS210.7[轻工技术与工程—粮食、油脂及植物蛋白工程]