| 石墨炉原子吸收法测定食用油中铅含量前处理方法比较 |
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| 引用本文： | 蒋丽,姚浔平,孔令威.石墨炉原子吸收法测定食用油中铅含量前处理方法比较[J].中国卫生检验杂志,2011(5):1127-1128,1131. |
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| 作者姓名： | 蒋丽 姚浔平 孔令威 |
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| 作者单位： | 浙江省宁波市疾病预防控制中心;浙江医药高等专科学校应用生物系; |
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| 摘 要： | 目的:比较石墨炉原子吸收法测定食用油中铅的前处理方法。方法:用干法灰化、湿法消解、微波消解、酸提取四种前处理方法提取同一食用油样中铅,石墨炉原子吸收法测定其结果。结果:石墨炉原子吸收法测定铅在相应的浓度范围内具有良好的线性关系,其相关系数大于0.9990,RSD小于5.0%,干法灰化、湿法消解、微波消解、酸提取四种前处理方法提取同一食用油中铅测定回收率分别为84.0%、103.0%、96.0%、80.0%,最低检出限分别为0.003 mg/kg、0.006 mg/kg、0.006 mg/kg、0.0015 mg/kg。结论:四种预处理方法各有其优缺点,均可应用于食用油中铅的检测,但微波消解相对其它三种方法较方便、快速、准确、污染少,还可用于砷、汞等其它元素的同时检测。
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| 关 键 词： | 干法灰化 湿法消解 微波消解 酸提取 石墨炉原子吸收法 铅 食用油 |
Comparison of sample pretreatment methods for determination of lead in edible oil by GF-AAS |
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| JIANG Li,YAO Xun-ping,KONG Ling-wei.Comparison of sample pretreatment methods for determination of lead in edible oil by GF-AAS[J].Chinses Journal of Health Laboratory Technology,2011(5):1127-1128,1131. |
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| Authors: | JIANG Li YAO Xun-ping KONG Ling-wei |
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| Institution: | JIANG Li1,YAO Xun-ping1,KONG Ling-wei2(1.Ningbo Municipal Center for Disease Control and Prevention,Ningbo 315010,China,2.D08,Department of Applied Biology and management of food testing,Zhejiang Pharmaceutical College,Ningbo 315000,China) |
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| Abstract: | Objective:To compare of the sample pretreatment methods for determination of lead in edible oil by GF-AAS.Methods: Lead in edible oil were extracted by the pretreated methods of dry ashing,wet digestion,microwave digestion and acid extraction and then determined by GF-AAS.Results: The correlation coefficient of GF-AAS was more than 0.9990,the RSDs were all less than 5.0%.The extraction recoveries of the pretreated methods of dry ashing,wet digestion,microwave digestion and acid extraction were 84.0%,103.0%,... |
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| Keywords: | Dry ashing Wet digestion Microwave digestion Acid extraction GF-AAS Lead Edible Oil |
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