两台电位滴定仪测定油品的对比分析

Comparative Analysis of Oil Measured by Two Potentiometers

选择市售主流的2个品牌的电位滴定仪进行油品测定的对比分析,分别使用花生油、玉米油、芝麻油和辣椒油4种油品进行水分、酸价、过氧化值的测定与分析,并对仪器的操控性、准确性、性价比等进行综合分析。结果表明,瑞士万通848 Titrino plus自动电位滴定仪优于梅特勒超越系列T7型自动电位滴定仪,前者测定结果更稳定,仪器不确定度更低,使用价值更高,后续可实现的自动化程度更高,更利于实验室工作的优化。

Two main brands of potentiometric titrators were selected for the comparative analysis of oil products.Four kinds of oils,such as peanut oil,corn oil,sesame oil and chili oil,were used for the determination and analysis of water,acid price and peroxide value,and the manipulation,accuracy and cost performance of the instrument were comprehensively divided.the results show that the Metrohm 848 Titrino plus automatic potential titrator is better than the Mettler Excellence Model T7 automatic potential titrator.the former is more stable,the instrument uncertainty is lower,the use value is higher,and the subsequent automation degree is higher,which is more conducive to the optimization of laboratory work.