The linear free energy equation logkะ =c+rR 2 +s H 2 +aโบa H 2 +bโบโค 2 + vV x was applied to the capacity factors for various series of solutes on C 18 stationary phases with aqueous methanol and acetonitrile eluents. Here, kะ are the capacity factors for a series of solutes with a given C 18 phase an
Reaction of vitamin k and dithiothreitol on reversed-phase C18 high-performance liquid chromatographic columns
โ Scribed by Louise M. Canfield; Rita B. Holzman
- Book ID
- 104146759
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 524 KB
- Volume
- 299
- Category
- Article
- ISSN
- 1873-3778
No coin nor oath required. For personal study only.
โฆ Synopsis
A non-enzymatically catalyzed side reaction between dithiothreitol and vitamin K occurs on reversed-phase C1 s high-performance liquid chromatographic columns. Excess dithiothreitol may be effectively removed from enzymatic reaction mixtures with N-ethylmaleimide. A low polarity gradient elution system is reported which gives quantitative recoveries (greater than 95%) of the vitamins in a concentration range useful for analysis of enzymatically catalyzed reactions.
๐ SIMILAR VOLUMES
Maize lines differ greatly in their composition and total seed content of tocopherols and carotenoids. When HPLC is employed for the determination of tocopherols, the carotenoids present in some of the extracts may not always be fully separated. It is observed that although tocopherols and carotenoi
The chromatographic performance of the deuterated solvents, CD30D and D20, has been investigated in reversed-phase micro high performance liquid chromatography. The chrornatographic performanceof CD30D is only slightlysuperior to that of CH30H. However, the performance of D20 is significantly superi