干辣椒中二氧化硫的不确定度评定

Evaluation of Uncertainty in Determination of Sulfur Dioxide Content in Dried Pepper

摘要: 辣椒产业在我国发展迅速，可以带来较强的经济效益，对农业发展、农民增收有着重要的作用。但是在干辣椒的生产过程中，二氧化硫这种食品添加剂经常被用来漂白、防腐，容易带来安全问题，进而影响身体健康。因此，本文采用酸碱滴定法，通过建立测定干辣椒中二氧化硫含量的数学模型，进行了不确定度进行评定。结果显示，对二氧化硫含量不确定度影响最大的是样品的重复性测量过程，其次是氢氧化钠滴定体积。

Abstract: The pepper industry is developing rapidly in our country, can bring strong economic benefits, and plays an important role in agricultural development and increasing farmers’ income. However, in the production process of dried chili peppers, food additives such as sulfur dioxide are often used for bleaching and preservatives, which can easily cause safety problems and affect human health. Therefore, this article uses the acid-base titration method to evaluate the uncertainty by establishing a mathematical model for determining the sulfur dioxide content in dried peppers. The results show that the largest impact on the uncertainty of sulfur dioxide content is the repeatability measurement process of the sample, followed by the titration volume of sodium hydroxide.