Sodium octyl sulphate

Eluant 0.1 M NaP04 buffer (pH 3.0) containing 3 mM sodium octyl sulphate, 0.1 mM EDTA, 0.1 mM ascorbic acid, and 5% MeOH... 

Reliable Ao(C) isotherms of diluted surfactant solution can be monitored using the very precise (accuracy 0.01 mN m 1) spherotensiometric technique [363]. It is based on determination of the forces emerging when a well wetted sphere is drawn out of a solution. Thus the surface tension of various surfactants such as NaDoS, sodium octyl sulphate [364,365], low molecular fatty acids and normal alcohols [366,367] and acetals, a special kind of nonionic surfactants [368] has been measured. These measurements were performed within a large surfactant concentration range in the presence of different electrolytes and at various temperatures. 

Cycloryl OS Duponol 80 EINECS 205-535-5 Octyl sodium sulfate Octyl sulfate, sodium salt Rhodapon OLS Sipex ols Sodium capryl sulfate Sodium octyl sulphate SOS. Used as a wetting agent rinse aid for industrial, institutional and household cleaners mercerizing agent for cotton goods surfactant in electrolyte baths for metal cleaning hard surface cleaning neoprene dispersant emulsifier for emulsion polymerization, Rhone Poulenc Surfactants. 

Fig. 13.1 Analysis of catecholamines in urine. (Reproduced by permission of Bioanalytical Systems). Conditions stationary phase, octylsilane mobile phase, citrate-phosphate buffer (pH 4) containing 7% methanol and 80 mg I sodium octyl sulphate electrochemical detector, -h700 mV for sample preparation see R. M. Riggin et a/.. Anal. Chem., 49, 2109 (1977). Peaks (with concentrations in urine) 1 = norepinephrine (lOOngmU ) 2 = epinenphrine OIngmU ) 3= dopamine (202 ng mU" ) IS = 3,4-dihydroxybenzylamine (internal standard).

Moreover, adsorption isotherms, or equations of state, represent the basis for the evaluation of adsorption kinetics and rheological properties of adsorption layers. Exact equilibrium values of surface or interfacial tensions are necessary to determine adsorption isotherms. For surfactants of low surface activity (for example, sodium octyl or decyl sulphate, hexanol or hexanoic acid) the adsorption reaches its equilibrium state in a time of the order of seconds to minutes. Higher surface activity results in greater times for establishing the equilibrium state of adsorption which sometimes cannot be realised by available experimental methods. To avoid long-time experiments, extrapolations were often carried out in order to get equilibrium values. Different extrapolation procedures as well as criteria of an equilibrium state of adsorption are discussed in the literature (cf Miller Lunkenheimer 1983). 

An aqueous phase is made by dissolving sodium octyl phenol +4EO sulphate in 60% of the water to which is added 20% of the ammonium persulphate and the sodium hydrosulphate followed by the tertiary butyl hydroperoxide. 

Hindered di-t-alkylamines RNHBu1 (R = t-Bu, t-octyl or 1-adamantyl) have been synthesized from t-alkylamines as follows. Reaction with peracetic acid gave the nitrosoalkanes RNO, which were treated with t-butyl radicals, generated from t-butylhydrazine and lead(IV) oxide, to yield t-butyloxyhydroxylamines. Reduction with sodium naphthalide in THF gave the products (equation 12). The di-t-alkyl-amines are inert to methyl iodide and dimethyl sulphate but can be alkylated by methyl fluorosulphonate42. 

Extraction of a specific volume (say, 500 ml) of the dirty water sample with hexane is carried out after bringing the pH to 2 by acidification of the sample. The hexane extract is dried by passing it through No. 1 filter paper containing anhydrous sodium sulphate. The extract is then blown dry to about 1 ml. This concentrated extract is adsorbed on a Bond Elut C, octyl (No. 606303)... 

Sodium salt of ethoxylated octyl phenol sulphate 0.24... 

A monomer phase is prepared by dissolving polyvinyl alcohol and sodium ethoxylated octyl phenol sulphate in the remaining water. The ethyl acrylate and methyl methacrylate monomers are added together with the sodium metabisulphite and the mixture stirred to form an emulsified monomer phase. 

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