Abnormal behaviors in the calibration curves of liquid chromatography–tandem mass spectrometry occurring in the quantitative analysis of surfactants near critical micelle concentrations

Surfactants, including quaternary ammonium compounds, are widely used in daily life as part of consumer chemical products and, more recently, in the shale oil industry. Because of their unique amphiphilic properties, surfactants form micelles at concentrations above a certain threshold known as the...

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