Abstract
A suitable method that allows, for the first time, the simultaneous determination of nine antibiotics which may help the therapy of acne vulgaris by rapid liquid chromatography with diode array detection in 7 min is presented in this work. An SB RP18 (50 × 4.6 mm; 1.8 μm particle size) column was used with the mobile phase consisting of a mixture of 0.1 mol L−1 potassium dihydrogen phosphate (pH 2.5) and acetonitrile at the gradient elution program. The correlation coefficients were all above 0.9999 in the linear range between 4–100 μg mL−1, the average spiked recoveries (n = 6) were 92.2–103.2% with RSD ranging from 0.04 to 4.5% depending on the target analytes. The method detection limits were in the range of 0.02–0.2 μg mL−1 in anti-acne cosmetics. The analysis of real cosmetic preparations demonstrated the fitness for the whole analytical procedure. The proposed method appeared therefore as a sound alternative for official testing method, which could overcome the general problems of time consuming, lack of the specificity and precision difficulty.
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Jin, W., Yang, YJ., Wang, WY. et al. Simultaneous Determination of Antibiotics in Anti-Acne Cosmetics by Rapid LC with DAD. Chroma 69, 1221–1226 (2009). https://doi.org/10.1365/s10337-009-1050-y
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DOI: https://doi.org/10.1365/s10337-009-1050-y