Analysis of surface-active addition products of ethylene oxide. III. Determination of free polyethylene glycols in non-ionogenic adducts of ethylene oxide by means of thin layer chromatography on silicagel

Obruba, K.

doi:10.1135/cccc19622968

Cited by 10 publications

(2 citation statements)

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“…189). Polymeric products ("condensates") from reaction of ethylene oxide with fatty amines can be chromatographed in the upper phase of the mixture methyl ethyl ketonc-2.5% ammonium hydroxide OBRUBA [58] has determined free polyethylene glycols in nonionic surface-active ethylene oxide adducts. The glycols were chromatographically separated on loose silica gel layers, using the upper phase [10] of the mixture diethyl ether-methanol-conc.…”

Section: Inhibitors and Antioxidantsmentioning

confidence: 99%

Synthetic Organic Products

Petrowitz¹

1969

Thin-Layer Chromatography

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Section: Inhibitors and Antioxidantsmentioning

confidence: 99%

Synthetic Organic Products

Petrowitz¹

1969

Thin-Layer Chromatography

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“…Methods reported for the quantitative determination of polyethylene glycols in nonionic surfactants include paper chromatography (1), adsorption chromatography (2), partition chromatography (3), gas chromatograpny (4,5), thin layer 1presented at the Meeting of the American Oil Chemists' Society, April 1976, New Orleans. chromatography (6,7), solvent extraction (8), sedimentation (9,10), and organic analysis (11). The primary problems often encountered with these methods are long analysis time, lack of specificity, difficulty of quantitation, limited application, and poor precision and accuracy.…”

Section: Introductionmentioning

confidence: 99%

Quantitative determination of polyethylene glycols in nonionic surfactants by high pressure liquid chromatography

Turner¹,

McCullough²,

Jackewitz³

1976

J Americ Oil Chem Soc

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A method employing high pressure liquid chromatography has been developed for the quantitative determination of polyethylene glycols in ethoxylated fatty alcohols and alkylphenols. This technique overcomes many of the limitations encountered in previously-reported methods. The polyethylene glycols are separated from the ethoxylated product and other sample components using a 65/35 acetonitrile/water mobile phase and a Bondapak C18/Corasil reversephase column system. The response factor of the differential refractometer detector is determined using Carbowax standards of appropriate molecular weights. The molecular weight of the polyethylene glycols in each sample is approximated using thin layer chromatography prior to the high pressure liquid chromatography calibration and analysis. The precision of this method for the determination of polyethylene glycols is -+ 4% relative or better, and the recovery of added polyethylene glycols is quantitative. Application of this method to a wide variety of commercial ethoxylated fatty alcohols and alkylphenols is presented.

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Die dünnschicht‐chromatographische Analyse auf dem Gebiet der Tenside

Bey

1965

Fette, Seifen, Anstrichm.

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Es wurde das Verhalten von Tensiden bei der dünnschicht‐chromatographischen Analyse untersucht. Das Ziel dabei war, eine qualitative Trennung der waschaktiven Substanzen in Mischungen zu erreichen, wie sie z. B. in Waschmitteln, Kosmetika und Textilhilfsmitteln vorliegen können. Das beschriebene Verfahren erlaubt eine Orientierung über vorhandene Tenside und ist ein wichtiges Hilfsmittel für die quantitative lonenaustauscher‐Analyse.

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Analysis of surface-active addition products of ethylene oxide. III. Determination of free polyethylene glycols in non-ionogenic adducts of ethylene oxide by means of thin layer chromatography on silicagel

Cited by 10 publications

References 0 publications

Synthetic Organic Products

Synthetic Organic Products

Quantitative determination of polyethylene glycols in nonionic surfactants by high pressure liquid chromatography

Die dünnschicht‐chromatographische Analyse auf dem Gebiet der Tenside

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