Abstract
This chapter introduces a suitable analytical method for routine residue monitoring of antimicrobial drugs in food. A simplified and space-saving technique of sample preparation followed by an isocratic mobile phase high-performance liquid chromatography (HPLC) coupled diode array detector for quantifying canthaxanthin (CX), colouring agent, in hen egg yolk was described here. The analyte was extracted from the sample using a handheld ultrasonic homogenizer with 0.6 ml solvent, and purified by a normal-phase InertSep® CN mini-syringe column. The total time and solvent consumption required for the analysis of a single sample were < 1h and < 7 ml, respectively. The method validation data (linearity, accuracy, precision, and system suitability) are well within the international method acceptance criteria. The procedure may be proposed as a standardized analytical method for the routine residue monitoring of CX in hen egg yolk.
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