| 石墨炉原子吸收光谱法测定胶囊中总铬的不确定度分析 |
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| 引用本文： | 刘永成,张丽英. 石墨炉原子吸收光谱法测定胶囊中总铬的不确定度分析[J]. 黑龙江医药, 2013, 26(4): 584-586 |
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| 作者姓名： | 刘永成 张丽英 |
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| 作者单位： | 黑龙江省食品药品检验检测所 哈尔滨150001 |
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| 摘 要： | 分析石墨炉原子吸收光谱法测定胶囊中总铬的测量不确定度。方法:应用测量不确定度评定理论,结合试验方法,建立数学模型,确定和计算测定过程各不确定度分量,分析石墨炉原子吸收光谱法测定胶囊壳中总铬的测量不确定度。结果:胶囊壳中总铬含量为39.2mg/kg,取包含因子k=2,其扩展不确定度为9.8mg/kg,最终报告胶囊壳中的总铬含量为(39.2±9.8)mg/kg;同时对影响测定结果的不确定度的各部分因素进行了量化。结论:影响测量结果的不确定度主要因素是回收率,标准曲线拟合引入的误差次之,其他因素如重复测定、标准物质及其稀释过程引入的不确定度、环境条件等对测量结果的不确定度影响较小。
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| 关 键 词： | 不确定度 总铬 石墨炉 胶囊 |
Uncertainty Analysis of Detecting Total Chromium in Capsules by GFAAS |
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| Affiliation: | LIU Yongcheng;Heilongjiang institute of food and drug control; |
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| Abstract: | Objective An analysis of uncertainty in measurement of detecting total chromium in capsules by GraphiteFurnace Atomic Absorption Spectrometry(GFAAS).Methods:According to the theory of assessment on uncertainty,by establishing mathematical model,the factors causing the uncertainty of the detection of total chromium in capsules by GFAAS were determined and calculated.Results: The content of total chromium in capsules was 39.2mg/kg,and expanded uncertainty was 9.8mg/kg(k=2).Conclusion:The major factor influence the determination of total chromium in capsules was recovery rate.The minor factor was the error introduced by standard curve fitting,and the others were the minimum factors. |
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| Keywords: | uncertainty analysis total chromium GFAAS capsules |
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