Method for determination of padimate in cosmetics
A technique for the determination of patimamate and its determination method, which is applied in the field of determination of pademamate in cosmetics, and achieves the effects of high sensitivity and optimized high-performance liquid chromatography conditions
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[0054] 1. Reagents and materials
[0055] Unless otherwise specified, the reagents used are of analytical grade, and the water is the experimental water specified in GB / T6682-2008.
[0056] Methanol: chromatographically pure.
[0057] Tetrahydrofuran: chromatographically pure.
[0059] Patrimate standard.
[0060] Pademamate mixed standard stock solution: Weigh an appropriate amount of Pademamate A and Pademamate O standard products (accurate to 0.0001g), and prepare a single-standard stock solution containing methanol 1000mg / L with methanol, and then use Methanol was prepared as a 100mg / L mixed standard stock solution.
[0061] Partimate mixed standard working solution: use methanol to prepare the mixed standard stock solution of Patimate to a concentration of 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10mg / L methanol mixed standard working solution.
[0062] 2. Instruments and equipment
[0063] High-performance liquid chromatography: equipped with a...
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