对羧基苯甲醛(4-CBA)标定过程不确定度讨论  

Discussion on the uncertainty of calibration process of p-carboxybenzaldehyde(4-CBA)

作　　者：赵英新 ZHAO Ying-xin(The Chemical Fibre Factory Of Urumqi Petrochemical Company,urnmqi 830019,China)

机构地区：[1]中国石油乌鲁木齐石化公司化纤厂

出　　处：《聚酯工业》2019年第6期22-24,共3页Polyester Industry

摘　　要：工业精对苯二甲酸(PTA)中对羧基苯甲醛(4-CBA)的测定采用液相色谱外标法进行测定。分析过程中用到的标准样品采用标准加入法标定。标准样品标定的不确定度来源有样品处理、标准溶液制备、工作曲线、进样量(定量管)及重复测定不确定度等5个方面。从上述4个方面对标准样品的相对扩展不确定度进行了讨论。The determination of 4-carboxybenzaldehyde(4-CBA)in purified terephthalic acid(PTA)was carried out by external standard method of liquid chromatography.The standard samples used in the analysis are calibrated by standard addition method.The uncertainty sources of standard sample calibration include sample processing,standard solution preparation,working curve,injection volume(Quantitative tube)and uncertainty of repeated determination.In this paper,the relative expanded uncertainty of standard samples is discussed from the above four aspects.

关 键 词：样品处理 标准溶液制备 工作曲线 进样量 重复测定 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]