石墨炉原子吸收直接测定酱油中铬  

Direct determination of Chromiun in soy sauce by GFAAS

作　　者：曹丽军[1] 李韬[1] 

机构地区：[1]浙江省金华市疾病预防控制中心,浙江金华321000

出　　处：《中国卫生检验杂志》2013年第3期597-598,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的:建立石墨炉原子吸收法测定酱油中铬的分析方法。方法:样品不经消解,以硝酸镁作基体改进剂,经稀释后直接采用石墨炉原子吸收法测定酱油中铬的含量。结果:选定了最佳测量条件,本方法的灵敏度、精密度均能满足检测工作的需求。本法铬的含量0μg/L～20.0μg/L范围内呈线性关系,线性相关系数大于0.9958,本法检出限为0.51μg/L。相对标准偏差为2.3%～5.1%,加标回收率为94.0%～109.0%。结论:本法简便、快速、灵敏度和精密度高。适用于酱油中铬含量的测定。Objective：To directly determine the chromium in soy sauce by graphite furnace atomic absorption spectroscopy. Methods： With Mg（ NO3 ）2 as matrix modifier, the sample was diluted for determination of chromium in soy sauce by GFAAS without digestion. Results： The sensitivity and precision of the method can both meet the test requirement. Chromium showed linearity in the range of 0 μg/L - 20.0 μg/L with correlation coefficient over 0. 9958. The detection limit of the method was 0.51 μg/L, the RSDs were between 2.3% -5,1% , the recoveries were 94.0% -109.0%. Condusion： This method is easy, rapid, high sensitive and preeisive, thus it is suitable for the determination of chromium in soy sauce.

关 键 词：石墨炉原子吸收法 基体改进剂 酱油中铬 

分 类 号：O657.31[理学—分析化学]