20858-23-5Relevant articles and documents
Chromium(VI) oxide oxidation of non-ethoxylated and ethoxylated alcohols for determination by electrospray ionization mass spectrometry
Beneito-Cambra, Miriam,Bernabe-Zafon, Virginia,Simo-Alfonso, Ernesto F.,Ramis-Ramos, Guillermo
, p. 2093 - 2100 (2010)
A new derivatization procedure to increase the sensitivity of electrospray ionization mass spectrometry (ESI-MS) to non-ethoxylated and ethoxylated alcohols was investigated. The analytes were oxidized with chromium(VI) oxide and the resulting carboxylic and ethoxy-carboxylic acids were isolated by extraction with ethyl acetate; the extracts were alkalinized and infused into the ESI-MS system working in the negative-ion mode. The yields of the combined oxidation-extraction were ca. 100% for non-ethoxylated fatty alcohols dissolved in acetone and they decreased moderately in samples containing increasing amounts of water (e.g., a 75% yield was obtained with 50% water). Ethoxylated alcohols with more than two ethylene oxide units resulted in yields of ca. 60%. Low limits of detection (LODs) were obtained when the procedure was applied to the analysis of body- care products and cosmetics containing fatty alcohols, e.g., in a varicose-vein cream, the LODs were 25 μ cetyl alcohol and 7.5 μ stearyl alcohol (detected as palmitic acid and stearic acid, respectively) per gram of sample. High molecular mass alcohols were also detected in seawater after pre- concentration by solid-phase extraction. Thus, the proposed method is particularly valuable for use in industrial samples having complex matrices and in environmental samples and it is competitive with other methods for the analysis of trace amounts of fatty alcohols.
SKIN CLEANSER COMPOSITION
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Page/Page column 0061; 0062; 0063; 0072; 0073; 0074, (2015/01/18)
A skin cleansing composition, comprising the following components (A), (B), and (C): (A) an alkyl ether carboxylic acid represented by the formula (1): wherein, R1 represents an alkyl group having 4 to 22 carbon atoms and n represents a number of from 0 to 20, wherein, R1 has an average carbon number of from 10.8 to 12.8 and the alkyl ether carboxylic acid contains a component in which n = 0 in an amount of from 4.3 to 30% by mass, and a component in which n = 1 and a component in which n = 2 in a total amount of 20% by mass or more and less than 40% by mass, (B) a fatty acid represented by the formula (2): wherein, R2 represents a linear or branched alkyl group or alkenyl group having 9 to 21 carbon atoms, and (C) a neutralizer, wherein the total content of the components (A) and (B) is from 20 to 50% by mass, a degree of neutralization of the components (A) and (B) is from 0.6 to 0.9, and a viscosity at 30°C is from 10 to 50000 dPa·s. ????????R1-O-(CH2CH2O)n-CH2-COOH?????(1) ????????R2-COOH?????(2)
