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。
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.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2007年第2期277-280,共4页
Food Science