食品科学 ›› 2017, Vol. 38 ›› Issue (24): 272-277.doi: 10.7506/spkx1002-6630-201724044

• 安全检测 • 上一篇    下一篇

高效液相色谱-原子荧光光谱联用法测定牛肝菌中无机汞、甲基汞、乙基汞的不确定度评估

毛永杨,杨桐,苏涛,李智高,田金兰   

  1. (1.大理州食品检验检测院,云南?大理 671000;2.大理市洱海保护管理局,云南?大理 671000)
  • 出版日期:2017-12-25 发布日期:2017-12-07
  • 基金资助:
    云南省卫生厅科研项目(云卫[2014]DB005)

Uncertainty Evaluation of for Determining Inorganic Mercury, Methyl Mercury and Ethyl Mercury in Boletus by High Performance Liquid Chromatography Combined with Atomic Fluorescence Spectrometry

MAO Yongyang, YANG Tong, SU Tao, LI Zhigao, TIAN Jinlan   

  1. (1. Food Inspection and Testing Institute of Dali, Dali 671000, China; 2. Erhai Lake Conservation and Management Bureau of Dali, Dali 671000, China)
  • Online:2017-12-25 Published:2017-12-07

摘要: 采用高效液相色谱-原子荧光联用法测定牛肝菌中无机汞、甲基汞、乙基汞,通过建立评估的数学模型,分析不确定度的主要来源,计算出不确定度的各主要分量,得出合成不确定度和扩展不确定度。结果表明:影响结果不确定度的主要因素是浓度因素、仪器、样品不均匀性及回收率,其中浓度因素主要受标准曲线拟合的影响。该评估系统可为今后采用高效液相色谱-原子荧光联用法测定食用菌中无机汞、甲基汞、乙基汞的不确定度评估提供参考。

关键词: 高效液相色谱-原子荧光联用法, 汞形态, 不确定度, 牛肝菌

Abstract: In this study, we identified the main sources of uncertainty by mathematical modeling and calculated the main uncertainty components and combined and expanded uncertainties for the determination of inorganic mercury, methyl mercury and ethyl mercury in Boletus by high performance liquid chromatography combined with atomic fluorescence spectrometry (HPLC-AFS). The results showed that the major factors of uncertainty were concentration, instrumental measurement, sample heterogeneity, and recovery. Moreover, the curve fitting was the major factor causing the uncertainty for concentration. This study may provide a guideline for uncertainty evaluation for determining inorganic mercury, methyl mercury and ethyl mercury in edible fungus by HPLC-AFS.

Key words: high performance liquid chromatography combined with atomic fluorescence spectrometry, mercury specie, uncertainty, Boletus

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