This application describes the separation of anionic surfactants and toluene in water.
In the Notification No. 261 from the Ministry of Health, Labour and Welfare, Appendix Table 24, a solid-phase extraction HPLC method is described for the analysis of anionic surfactants.
The cautionary note for this analysis is the potential for detection of toluene as a contaminant peak.
This is because the nonionic surfactant test and equipment used for toluene pretreatment can be shared, and the presence of toluene in the atmosphere can cause contamination.
Toluene and anionic surfactants were separated using Inertsil ODS-3, a highly retentive column.