Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Analysis of Surface-Active Ions

The analysis of surface-active anions comprises the determination of simple aromatic sulfonic acids, hydrotropes (toluene-, cumene-, and xylene sulfonates), alkane- and alkene sulfonates, fatty alcohol ether sulfates, alkylbenzene sulfonates, and a-sulfofatty acid methyl esters. Such compotmds are relevant predominantly in the detergent and cleansing industry. [Pg.424]

Surface-active anions with aromatic backbone have long been separated by RPIPC and detected sensitively via their UV-absorption [41], However, a chromatographic determination of the other compound classes mentioned above is only feasible by conductivity detection. [Pg.425]

The analysis of an olefin sulfonate, which is rarely a pure product, is much more difficult. The different positions of the double bond in the alkyl chain and the cis/trans isomerism generally lead to a product mixture of numerous compounds. Thus, satisfactory separations are only obtained if the spatial arrangement of the alkyl groups at the double bond is defined the position of the double bond must also be known. The chromatogram of a Cie-olefin sulfonate (trans-3-en) is shown in Fig. 6-37. The Cis-olefin sulfonate (trans-3-en) has a slightly shorter retention time than the alkane sulfonate of equal alkyl chain length. This difference is explained by the enhanced solubility of the imsaturated compound in the polar eluant. [Pg.426]

10 mmol/L NH4OH / acetonitrile (65 35 v/v) flow rate 1 mL/min detection suppressed conductivity injection volume 50 pL solute concentration 100 mg/L each of C,6-olefine sulfonate (trans-3-en) (1) and C,6-alkane sulfonate (2). [Pg.427]

Ethoxylation of fetty alcohols prior to their sulfonation leads to a class of compounds caUed tty alcohol ether stdfates, which are contained in a variety of detergents and cleansing agents as active compounds. [Pg.428]

Because arylalkylamines as well as alkaloides and barbiturates have an aromatic skeleton, they can all be detected very sensitively by measuring the light absorption at a wavelength of 220 nm. [Pg.615]

10 mmoi/L NH40H/MeCN (65 35 v/v) flow and Ci6-alkane sulfonate (2). [Pg.618]


See other pages where Analysis of Surface-Active Ions is mentioned: [Pg.1]    [Pg.271]    [Pg.271]    [Pg.273]    [Pg.275]    [Pg.277]    [Pg.279]    [Pg.281]    [Pg.283]    [Pg.285]    [Pg.583]    [Pg.615]    [Pg.615]    [Pg.617]    [Pg.619]    [Pg.621]    [Pg.623]    [Pg.625]    [Pg.627]    [Pg.629]    [Pg.631]    [Pg.633]    [Pg.635]    [Pg.424]    [Pg.429]    [Pg.431]    [Pg.435]    [Pg.437]   


SEARCH



Activity of ions

Ion activity

Ion analysis

Ion-activated

Surface active ion

Surface analysis

Surface analysis of

Surface ions

© 2024 chempedia.info