GB / T 5009.35-2003 "Determination of Synthetic Colorants in Foods" Pretreatment in high-performance liquid chromatography adopts polyamide adsorption method or liquid-liquid partition method for pigment extraction, and Dima Technology pretreatment uses polymer matrix hydrophilic The lipophilic equilibrium reversed-phase solid phase extraction column ProElut PLS is used to extract pigments, which is simpler and easier than the national standard method, with higher extraction efficiency and better purification effect; at the same time, the high-performance liquid chromatography detection method has been improved, using Dima Two reversed-phase chromatography columns, Inspire and Diamonsil, are used for gradient elution to detect synthetic colorants in food. The separation effect is more excellent and the accuracy of qualitative and quantitative analysis is increased.

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