ABSTRACT
Fig. 16.1 shows a gas chromatogram of alkylbenzene sulphonate methyl esters in a river water sample [5]. The pattern of the gas chromatogram is analogous to that of the linear alkybenzene sulphonate standard. The assignment of the peaks was performed on the basis of the retention times and mass spectrum, and the individual components of alkylbenzene sulphonate were determined by mass fragmentography. For overlapped peaks on the gas chromatogram, more than two mass spectra were recorded. The total amounts of alkylbenzene sulphonate determined by mass fragmentography were in good accord with those determined by gas chromatography. Desulphonation gas chromatography has been applied [1^4] to the analysis of partially degraded linear alkylbenzene sulphonate mixtures.
