Analysis of Nonionic Surfactansts (I) Analysis of Nonionic Surfactants of Ethylene Oxide Adducts by High Speed Liquid Chromatography

Abstract

A high speed liquid (HL) chromatographic technique was applied to analysis of nonionic surfactant of ethylene oxide (EO) adducts.
Pattern analysis of EO adducts (ether and ester types) and polyethyleneglycol (in Fig.3, 4, 5 and 8) were carried out under the following conditions; Zorbax-SIL column: 2.1 mm i. d. x 25 cm, mobile phase: mixture of acetone and n-hexane (gradient rate, 5% acetone/min. ) temperature: 30°C, pressure: 1500 psi, detector: modified moving wire/flame ionization detector (temperature of evaporator: 70°C, N2 gas flow rate: 60 m//min. )
A sample was to be acetylized prior to HL chromatogram in order to decrease the adsorption on column. The mole distribution of E0 adducts in the range about 30 was estimated by the anlysis of HL chromatogram. Retention time was directly proportional to an E0 mole number. Alkyl group composition of the peak appeared on HL chromatogram was determined by introducing the elute to gas chromatography.