This method is applicable to measure trace levels of non-ionic surfactants as Bismuth Active Substances (BiAS) in reference to nonylphenol-ethoxylate with 10 ethylene oxide units (NP10).
The presence of anionic surfactants does not interfere with the determination, however, interference of cationic surfactants should be considered.
Access to the online Version of ICUMSA Method GS2/4/8-54 (2017) can be obtained from the Sugar Industry Website, operated by Bartens. The online access for two years costs EUR35 (+ 19 % VAT for German and EU citizens without EU VAT No.).