Method for measuring p-hydroxybenzoate in cosmetics
A technology for the determination of hydroxybenzoic acid esters and methods, which is applied in the field of determination of ingredients in cosmetics, can solve the problems of low analysis efficiency, high analysis cost, and high operation intensity, and achieve high analysis efficiency, low analysis cost, and easy operation. low intensity effect
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[0061] A method for determining parabens in cosmetics, comprising the following steps:
[0062] A. Tested sample processing:
[0063] Weigh 1.00 g of the tested cosmetic shampoo and body wash respectively into a stoppered test tube, add 10.0 mL of methanol to oscillate to disperse, extract by ultrasonic wave for 15 min; rotate at 4000 rps, centrifuge for 10 min, take the supernatant and filter to obtain the filtrate; The absorbance of the filtrate is in the linear range, quantitatively pipette the filtrate, dilute with methanol to 10.0mL to obtain the dilution;
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