食品科学 ›› 2007, Vol. 28 ›› Issue (2): 277-280.

• 分析检测 • 上一篇    下一篇

高效液相色谱法测定茶饮料中苯甲酸结果不确定度评定

 蔡秋, 朱明   

  1. 贵州出入境检验检疫局综合技术中心; 贵州出入境检验检疫局综合技术中心 贵州贵阳550004; 贵州贵阳550004;
  • 出版日期:2007-02-15 发布日期:2011-12-31

Uncertainty Evaluation for Determining Concentration of Benzioc Acid in Tea Drink by HPLC

 CAI  Qiu, ZHU  Ming   

  1. Technic Center, Guizhou Entry-Exit Inspection and Quarantine Bureau, Guiyang 550004, China
  • Online:2007-02-15 Published:2011-12-31

摘要: 本文采用分层建模方法建立了高效液相色谱法测定茶饮料中苯甲酸结果不确定度评定的数学模型,对测量过程中的不确定度来源进行逐层分析和合成,运用最小二乘法对外标曲线拟合的不确定度进行了评定,采用极差法评定测量次数较少时引起的测量不确定度。本方法对采用外标法定量的高效液相色谱、气相色谱等测定结果的不确定度评定具有参考作用。

关键词: 高效液相色谱, 不确定度, 苯甲酸

Abstract: This paper establishes mathematical model of uncertainty evaluation for determining the concentration of benzioc acid in tea drink by high performance liquid chromatography, adopting the method of layer modeling evaluation. The sources of uncertainty are analyzed to compose steps for whole determination procedure. The uncertainty of external calibration curve fitting is evaluated with the least square method. Uncertainty resulted from the less measurement times is evaluated by using the extreme deviation method. The evaluating method of uncertainty could be used as references for evaluating the uncertainty of determined results in high performance liquid chromatography and gas chromatography with external calibration curve.

Key words: HPLC, uncertainty, benzioc