Determination of Melamine Uncertainty Assessment in Frozen Drinks

Abstract

The uncertainty assessment of melamine in frozen drinks by high-performance liquid chromatography, According to the basic methods and procedures stipulated in the Assessment and presentation of Measurement Uncertainties and the Guidelines for the Assessment of Uncertainty in Chemical Analysis, The main sources of influence uncertainty were analyzed, and the assessment method for determining melamine uncertainty in frozen drinks was established. The results show that the results of (0.661 mg/kg ± 0.03, <i>k</i>=2) affect the determination of melamine uncertainty in frozen drinks, Uncertainty introduced by the fitted curve, the standard curve preparation process, the measurement repeatability, the Sample volume, the standard purity, Standard weighing and the sample amount. The model provides a reference for the uncertainty assessment of melamine in frozen drinks According to it, At the same time, in the daily detection and weighing, the measurement activities can be used to control the fitting curve and the standard solution preparation process, in order to reduce the measurement uncertainty, improve the accuracy of the test results, the compliance of the measurement results is important.