| 微波消解—石墨炉原子吸收法测定红薯粉中的痕量铅 |
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| 引用本文： | 张芸兰. 微波消解—石墨炉原子吸收法测定红薯粉中的痕量铅[J]. 食品工程, 2009, 0(1) |
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| 作者姓名： | 张芸兰 |
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| 作者单位： | 湖南永州职业技术学院,永州,425006 |
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| 摘 要： | 通过对红薯粉丝中有害元素铅含量的测定,建立红薯粉丝中铅含量的测定方法。采用微波消解法处理红薯粉丝样品,加入质量分数2%NH4H2PO4-0.2%Mg(NO3)2混合液作为基体改进剂,使用石墨炉原子吸收分光光度法测定铅含量。铅元素在2.0ng/mL～40.0ng/mL的范围内吸光度与浓度呈良好的线性关系(r=0.9957),平均回收率为98.05%,RSD=1.68%(n=6)。该法简单、准确,可作为检测红薯粉丝中铅含量的方法,为食品安全提供可靠的技术保障。
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| 关 键 词： | 微波消解 石墨炉原子吸收光谱法 红薯粉 铅 |
Microwave digestion-GFA determination of plumbum in sweet potato noodles |
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| ZHANG Yun-lan. Microwave digestion-GFA determination of plumbum in sweet potato noodles[J]. Food Engineering, 2009, 0(1) |
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| Authors: | ZHANG Yun-lan |
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| Affiliation: | Hunan Yongzhou Vocational Technical college;Yongzhou 425006;China |
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| Abstract: | To establish the method of measurating plumbum s content in sweet potato noodles by mensurating the harmful element plumbum.Applies the method of microwave digestion to deal with sweet potato noodles samples,adds the intermixture of 2% NH4H2PO4-0.2% Mg(NO3)2 as matrix modifier,measures plumbum s con-tent by GF-AAS.The linear range of plumbum s absorbance was 2.0 ng·mL-1～40.0 ng·mL-1.The average recovery was 98.57%,RSD=1.49%(n=6).The method is simple, can be used as the method of measuring plumbum s content ... |
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| Keywords: | microwave digestion GFA Sweet potato |
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