Alkanesulfonates alkyl chain length

Anionic surfactants such as alkanesulfonates, alkyl sulfates, and LAS are water-soluble, surface-active materials that are consumed in large quantities in industrial and commercial formulations. Thus, their disposal may impact water reservoirs. LAS surfactants, which are used commercially, are quite complex mixtures containing several homologs and positional isomers. The degradation rates and toxicity of LAS depend on the alkyl chain length and the position of the phenyl ring. 

C2-C1S linear alkylsulfates and alkanesulfonates separation by alkyl chain length... 

C10-C12 Alkanesulfonates resolution by alkyl chain length Merck LiChrosorb RP-8, 4.6 x 125 mm 80 20 MeOH/HzO RI 12 ... 

Cf, and Cx /.v(alkyl)sulfosuccinates single peak for each elution in reverse order of alkyl chain length separation from alkanesulfonates... 

TLC plates prepared from polyamide powder will give a separation according to alkyl chain length, as, presumably, will commercially available reversed-phase plates (12). See Table 6 for a summary of published methods for alkanesulfonates. 

C4-C1S alkanesulfonates separation by alkyl chain length Polyamide powder B-0 (Wako, Osaka, Japan) bound with cellulose (Camag) 15 1 0.1 M NHVpyridine or 15 15 1 MeOH/0.1 M NH3/ pyridine Pinacryptol yellow UV light 12... 

C9-C13 alkyl sulfates and Cg-Cis alkanesulfonates separation by decreasing alkyl chain length separation from each other detection of dodecyl sulfate in shampoo, toothpaste, and facial cleanser... 

C5-C18 alkanesulfonates separation by decreasing alkyl chain length simultaneous determination of cationics CZE Silica, 50 um x 50 cm 0.1 M boric acid, 0.005 M in pyri-dinium p-toluenesulfonate pH 6.0 or 7.5 50% CH3OH Cathodic, indirect UV, 208 or 220 nm 9... 

Cg-Cis alkyl sulfates and C2-Cifi alkanesulfonates separation by increasing alkyl chain length CZE Silica, 75 pm x 43 cm, -20 kV MeOH, 0.01 M in p-toluenesulfonic acid and 0.001 M in sodium p-toluenesulfonate Anodic, indirect UV, 214 nm 22... 

C8-C20 alkyl sulfates and alkanesulfonates separation by increasing alkyl chain length Capillary isotachophoresis (CITE) FIFE, 0.55 mm x 22 cm Leading electrolyte 0.01 M L-histidine hydrochloride, apparent pH 4.88, 2% tetraethylene glycol Terminating electrolyte 0.01 M picolinic acid both in 80 20 MeOH/H20 Conductivity 1... 

Ci()-Cig alkanesulfonates and C12 alkyl sulfates elution in reverse order of alkane chain length (alkyl sulfate eluted first) separation from W.v(alkyl)sulfosuccinates C 2 alkanesulfonate determination... 

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