6533b871fe1ef96bd12d1a76
RESEARCH PRODUCT
Characterization of ethylene oxide/tert-octylphenol condensates by ultraviolet and infrared spectrometry
Salvador SagradoMiguel De La GuardiaJ.l. Carriónsubject
Ethylene oxideCondensationAnalytical chemistryInfrared spectroscopyAqueous ethanolMolar absorptivityMass spectrometrymedicine.disease_causeBiochemistryAnalytical ChemistryCharacterization (materials science)chemistry.chemical_compoundchemistrymedicineEnvironmental ChemistrySpectroscopyUltravioletdescription
Abstract The average degree of condensation of ethylene oxide/tert-octylphenol condensate surfactants can be estimated rapidly by u.v. and i.r. spectrometry. The u.v. method is based on evaluating the specific absorptivity, a , at 275 nm in aqueous ethanol (60:40 v/v), and inserting this value in equations obtained from previously characterized samples, relating a to the average properties to be determined. Infrared spectrometry is applied similarly; the average properties to be determined are related to the ratio between the band heights at 960 and 840 cm −1 . The relative standard deviations ( n = 10) obtained for a sample of Triton X-100 were 2% by u.v. spectrometry, and 3% by i.r. spectrometry. The accuracy was similar to that obtained by n.m.r.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1986-01-01 |