Method for rapidly measuring p-hydroxy-benzoate ester in cosmetics
A hydroxybenzoate, rapid determination technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of low analysis efficiency, high analysis cost, high operation intensity, etc., and achieve high analysis efficiency, low analysis cost, The effect of low operating intensity
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[0061] Example one:
[0062] A rapid determination method of parabens in cosmetics includes the following steps:
[0063] A. Processing of samples to be tested:
[0064] The cosmetic sample to be tested is extracted and filtered with methanol. The specific operation is: weigh 1.00 g of the sample into a test tube with a stopper, add 10.0 mL of methanol and shake to disperse, ultrasonically extract for 15 minutes; rotate at 4000 rps, centrifuge for 10 minutes, and filter the supernatant. Get cosmetic filtrate.
[0065] B. Establishment of background spectrum database:
[0066] B1. Obtain the spectral data of cosmetic samples:
[0067] The cosmetic filtrate prepared in step A is analyzed by high performance liquid chromatography, and multi-wavelength spectral data of multiple cosmetic samples are collected;
[0068] B2. Obtain the spectral data of the component to be tested:
[0069] Prepare 10 mg / L methyl paraben, ethyl paraben, and propyl paraben in a mixed methanol solution, filter ...
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