| Autor: |
Silva CR; Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970 Campinas, São Paulo, Brazil., Bachmann S, Schefer RR, Albert K, Jardim IC, Airoldi C |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of chromatography. A [J Chromatogr A] 2002 Mar 01; Vol. 948 (1-2), pp. 85-95. |
| DOI: |
10.1016/s0021-9673(01)01263-8 |
| Abstrakt: |
A new C18 urea stationary phase was prepared by a single-step modification process through the reaction of ProntoSil spherical silica (3 microm, Bischoff) with the trifunctional alkoxysilane (CH3CH2O)3-Si-(CH2)3-NH-C(O)-NH-(CH2)17-CH3, prepared in our laboratory. The phase was characterized by elemental analysis and solid-state 29Si and 13C nuclear mangnetic resonance spectrometry. Chromatographic evaluations of the new phase in 150 x 3.9 mm HPLC columns involving the separation of different test mixtures, indicate good performance for both polar and basic mixtures and also show promising results for further applications. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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