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Sodium N-lauroylsarcosinate (NLS) and sodium methyl cocoyl taurate (SMCT) are widely used in sulfate free personal care products. We present a straightforward and highly sensitive High-Performance Liquid Chromatographic (HPLC) method for simultaneous detection and estimation of these substances in commercial personal care products. The HPLC method has a detection limit for NLS of concentrations as low as 1.5 ppm, and that for SMCT of 4.0 ppm, all with a signal-to-noise (S/N) ratio exceeding 3.0. Additionally, the method enables quantification down to 4.5 ppm for NLS, and 12.0 ppm for SMCT, with an S/N ratio surpassing 10.0. This validated method serves as a versatile tool for the accurate quantification of NLS, and SMCT in sulfate free personal care products like shampoos, face washes, body washes, baby shampoos, and toothpastes.

journal of chromatographic science

Method for Simultaneous Determination of Amino Acid Surfactants Sodium N-Lauroylsarcosinate and Sodium Methyl Cocoyl Taurate in Personal Care Products, by Using High Performance Liquid Chromatography