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Details van artikel 4 van 14 gevonden artikelen
| Titel: |
Characterization of impurities in nonionic surfactants and their effect on ultraviolet light absorbers |
| Auteur: |
Shahjahan, M. Afzal, M. Dhami, M. S. I. |
| Verschenen in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |
| Paginering: | Jaargang 27 (1992) nr. 6 pagina's 1459-1475 |
| Jaar: |
1992-08 |
| Inhoud: |
A thin layer Chromatographic method has been developed to characterize polyethylene glycol in commercial nonionic surfactants. The influence of these contaminants on the solubility and spectral properties of certain ultraviolet light absorbing compounds has been studied. The presence of impurities lowered the solubility of the absorbers and higher wavelengths of maximum absorbance (λ max.) are observed which changed gradually to lower wavelength with time. The ultraviolet light absorbers used are representative of two structural classes, the substituted benzophenone (Uvinul D-50) and the substituted acrylonitrlles (Uvinul N-35). It has been found that the absorber which has greater degree of interaction with the polyoxyethylene chain of the micelle is more affected by the contaminants. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 14 gevonden artikelen
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