Strongly basic polyethylenimines (PEI) were coated on both untreated and diol-bonded silica particles. The resultant basic surface was found suitable for the separation of strongly basic alkylamines such as a-phenylethylamines with a pK, of ca. 4, under supercritical fluid chromatography (SFC) condi
β¦ LIBER β¦
Packed capillary column supercritical fluid chromatography of fat-soluble vitamins using liquid crystal polysiloxane coated particles
β Scribed by Y. Shen; J. S. Bradshaw; M. L. Lee
- Book ID
- 112722614
- Publisher
- Springer
- Year
- 1996
- Tongue
- English
- Weight
- 458 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0009-5893
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A recently developed microelectrochemical detector for packed capil-Ε½ . lary column supercritical fluid chromatography pcSFC has been applied to determine nanogram amounts of tocopherols and vitamin A in vegetable oil samples. With this procedure, no removal of triglycerides, preconcentration, or is