Determination of aromatic sulphonates in surface waters by high-performance liquid chromatography with coupled fluorescence and UV detection

Separation of rutin nona(H-) and deca(H-) sulfonate sodium by ion-pairing reversed-phase liquid chromatography

“…pH values typically vary from slightly acidic (pH 5) [13] to neutral [14]. For stable conditions the pH should be in a range where small changes in …”

Reversed-Phase High-Performance Liquid Chromatographic Separation and Determination of 4-Amino-azobenzene-4′,5-disulfonic Acid and Related Products in Industrial Wastewater Effluents

“…Reversed-phase HPLC (RP-HPLC) has been well established and considered to be the routine method for the analysis of linear alkyl benzene sulfonates [12 -14]. However, with increasing polarity of the sulfonates their interactions with the C 18 columns become too week to obtain separation [15,16]. Hence, ion-pair reversed-phase HPLC has become the method of choice and a powerful means for the analysis of amino-substituted aromatic sulfonates [17 -19].…”

Field-amplified sample stacking and nonaqueous capillary electrophoresis determination of complex mixtures of polar aromatic sulfonates

“…AS are frequently found in natural waters [6][7][8][9], and they have even been detected in tap and drinking waters at concentrations of about 1 mg/L [10]. In industrial waste water and water treatment plants the concentrations of these sulfonates may reach the mg/L range [11][12][13].…”