Determination of traces of sodium alkylbenzenesulphonate by high-performance liquid chromatography. Application to water

Environmental monitoring for linear alkylbenzene sulfonates, dialkyltetralin sulfonates and their biodegradation intermediates

“…The LASI and DATSI were not extracted from water or methanol extracts of sediments on SPE columns or strong anion-exchange (SAX) columns. Although LAS can be extracted by either reversephase columns or by anion-exchange resins [20,21], LASI and DATSI are not strongly retained by C 8 or C 18 columns, even under acidic conditions. Furthermore, extraction of the intermediates on SAX columns is not done because of concerns about stability and the possible formation of methyl derivatives upon elution with acidic methanol.…”

Determination of linear alkylbenzenesulfonates and dialkyltetralinsulfonates in water and sediment by gas chromatography/mass spectrometry

“…However, this method is subject to interferences from other anionic detergents and is not suitable for the specific determination of LAS in the environment (4). Detection of LAS (7)(8)(9) and LAS intermediates (9)(10)(11)(12)(13) by LC methods employing UV and fluorescent detection is suitable for detecting low concentrations of LAS. The fluorescent LC methods are capable of detecting 0.01 mg/L of LAS (14,15) in water and 0.1 mg/kg in solid samples (14) but are not suitable for the detection of DATS.…”

Simultaneous determination of linear alkylbenzene sulfonates, alkylphenol polyethoxylates, and nonylphenol by high-performance liquid chromatography

“…For these two techniques, the surfactant molecules had to be transformed by desulfonation to yield alkylbenzenes (8) or by derivatization to sulfonyl chlorides (16) or sulfonate esters (17). The determination of LAS without any derivatization has also been carried out by reversed-phase HPLC (18)(19)(20)(21)(22)(23).…”