摘要
目的：建立食品中砷含量测定的方法。方法：样品经HNO3微波消解系统消解后,用硝酸镍基体改进剂技术提高食品中砷的灰化温度,用塞曼扣背景使原子吸收信号与背景信号相互分离,标准加入法结合GFAAS测定食品中砷,能消除样品消化液中硝酸和氮氧化物的干扰。结果：实验表明,该方法能有效消除样品基体的干扰,方法检出限为0.08 mg/kg,用相对标准偏差考察方法的精密度,RSD为3.6%-9.8%,用加标回收考察方法的准确性,加标回收率为92.3%-108.5%之间。结论：本方法灵敏度高、精密度与准确度较好,适用于食品中砷的测定。
Objective：To establish a method for determination of As in food by GFAAS using standard addition method.Methods： The sample was digested by microwave digestion system with HNO3,nickel nitrate matrix modifier was used to improve the ashing temperature,Zeeman background deduction was used to separate atomic absorption signal and background signal.Determination of As in food by GFAAS using standard addition method can reduce the interference of nitric acid and nitrogen oxides.Results： The detection limit was 0.08mg/kg,relative standard deviation（RSD%） WAS 3.6%-9.8%.The recovery range was between 92.3%-108.5%.Conclusion： The method is accurate and sensitive and reliable for the detection of As in food.
出处
《中国卫生检验杂志》
CAS
2011年第5期1118-1119,1122,共3页
Chinese Journal of Health Laboratory Technology
关键词
标准加入法
硝酸镍
GFAAS
食品
砷
Standard addition method
Nickel nitrate
GFAAS
Foods
Arsenic
