High speed liquid chromatographic analysis of citric, lactic, urocanic and pyroglutamic acidsin cosmetic products

淳, 中村; 良広, 森川; 勲, 松本

doi:10.2116/bunsekikagaku.29.5_314

Cited by 7 publications

(10 citation statements)

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“…One of the major components in this mixture is a class of /3-hydroxy-~branched carboxylic acids (2) called corynomycolic acids (3,4). One of the major components in this mixture is a class of /3-hydroxy-~branched carboxylic acids (2) called corynomycolic acids (3,4).…”

Section: Introductionmentioning

confidence: 99%

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Rapid analysis of ionic and nonionic surfactant homologs by high performance liquid chromatography

Nakamura

Morikawa

Matsumoto

1981

J Americ Oil Chem Soc

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Several ionic and nonionic surfactants were separated into their homologs and their homologous distributions were determined by high performance liquid chromatography on an octadecyl-silica (TSK Gel LS-410) column with a water-methanol-sodium chloride mixture as a mobile phase. The recommended condition for the separation was as follows: column size, 4 mmid x 250 mm; mobile phase, water/methanol (15/85, v/v) containing 0.4 M/L sodium chloride; column temp., 50 C. Under this condition, three nonionic, four anionic and one cationic surfactants were efficiendy separated into their respective homologs. The addition of sodium chloride affected particularly the separation of strongly ionogenic surfactants such as sodium alkylsulfates and alkylbenzyldimethylammonium chlorides. Analytical results of homologous distributions of several commercial surfactants were in good accordance with those obtained by the conventional gas chromatography (GC) method. / JAOCSJanuary 1981 (SD&C 2) (SD&C 3) JAOCS January 1981 / 73

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Section: Introductionmentioning

confidence: 99%

“…Spreading pressures of many carboxylic acids have been reported (7)(8)(9)(10)(11)(12)(13) as well as some determinations of the effect of pH changes (7,9,12,13). The spreading pressures of 1 Biochemical Engineering, The University of Western Ontario, London, Ontario, Canada N6A 5B9.…”

Section: Introductionmentioning

confidence: 99%

Rapid analysis of ionic and nonionic surfactant homologs by high performance liquid chromatography

Nakamura

Morikawa

Matsumoto

1981

J Americ Oil Chem Soc

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“…Apparatus A Magna 550 system from Nicolet Corporation (Madison, WI, USA) with Ever-Glo globar radiation was used. The spectrometer makes it possible to work with a nominal resolution of 0.5-32 cm 21 . This apparatus is equipped with a Ge/KBr beam splitter which gives a working range from 7400 to 350 cm 21 .…”

Section: Methodsmentioning

confidence: 99%

“…The spectrometer makes it possible to work with a nominal resolution of 0.5-32 cm 21 . This apparatus is equipped with a Ge/KBr beam splitter which gives a working range from 7400 to 350 cm 21 .…”

Section: Methodsmentioning

confidence: 99%

“…Despite the fact that AHAs, especially glycolic acid, are very widely used today as active principles in facial creams, there is not yet legislation on its concentration in cosmetics nor official analytical methods for the determination of these components. In the studies that have been published on the determination of AHAs in cosmetic or dermatological formulations the instrumental techniques used were high performance liquid chromatography (HPLC) [21][22][23][24][25] or capillary electrophoresis. 26 As has been said above, the properties of the AHAs depend on their chemical form in the finished product.…”

Section: Introductionmentioning

confidence: 99%

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Stopped-flow Fourier-transform infra-red spectrometric speciation of glycolic and lactic acids in cosmetic formulations

Salvador

Peña

Guárdia

2001

Analyst

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The dermatological activity of cosmetic formulations containing alpha-hydroxyacids depends on their different chemical forms, and it is therefore useful to determine these species in the finished products. In the present report a new procedure for studying the protonation equilibria of glycolic and lactic acids by stopped-flow Fourier-transform infra-red (FTIR) spectrometry is described. The procedure was validated for use in the speciation of glycolic and lactic acids in cosmetic formulations, with preferential attention given to glycolic acid, which is the most widely used. Species of these alpha-hydroxyacids can be approximately determined at different pHs and the total content of each alpha-hydroxyacid can be accurately determined (according to the Student t-test at 5% significance level). The recovery of the total content of glycolic acid from commercial cosmetic formulations was 101+/-4%. The RSD of the determinations of the total content and those of the species was of the order of 2-7%.

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Preparation of 5-hydroxymethylfurfural via fructose acetonides in ethylene glycol dimethyl ether

Chen¹,

Kuster²,

Wiele³

1991

Biomass and Bioenergy

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High speed liquid chromatographic analysis of citric, lactic, urocanic and pyroglutamic acidsin cosmetic products

Cited by 7 publications

References 0 publications

Rapid analysis of ionic and nonionic surfactant homologs by high performance liquid chromatography

Rapid analysis of ionic and nonionic surfactant homologs by high performance liquid chromatography

Stopped-flow Fourier-transform infra-red spectrometric speciation of glycolic and lactic acids in cosmetic formulations

Preparation of 5-hydroxymethylfurfural via fructose acetonides in ethylene glycol dimethyl ether

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