Evaluation of the presence of major anionic surfactants in marine sediments

► Analytical method to identify and quantify insoluble soap in marine sediments. ► Matrix effect study and comparison of different extraction techniques. ► Validation of the method (quality parameters, accuracy, proficiency testing assays). ► Statistical study of the presence of insoluble soap and LAS in marine sediments. ► Use of ANOVA test and the multivariable analysis, both for insoluble soap and LAS.