Comparative Study on Analysis of Synthetic Colorants by Polyamide Adsorption and Ultrasonic Extraction Methods

In this work, sample pretreatment methods of polyamide adsorption method and ultrasonic extraction method were used for the extraction of synthetic colorants in beverages using high performance liquid chromatographic(HPLC) analysis. The application of the above two sample pretreatment methods for the analysis of synthetic colorants in beverages was compared, and the results showed that there was no significant difference based on two different pretreatment methods, but there were significant differences in the analysis time, operation complexity, analysis costs and the influence of impurity peaks.