Sanagi, Marsin Marsin and See, Hong Heng and Ibrahim, Wael A. W. and Naim, Ahmedy Abu (2005) High temperature liquid chromatography of tocol-derivatives on polybutadiene-coated zirconia stationary phases. Chromatographia, 61 . pp. 567-571. ISSN 00095893
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Official URL: http://dx.doi.org/10.1365/s10337-005-0565-0
High temperature reversed-phase high performance liquid chromatography is evaluated as a new approach for the separation of vitamin E isomers (a-, ?-, d-tocopherol, and a-, ?-, d-tocotrienol) and a-tocopherol acetate. The separations of each analyte were examined by varying the eluent composition and column temperature. Using a polybutadiene-coated zirconia column at temperatures of 80°C-140°C, complete separations were achieved within 10-20 min using organic modifier (acetonitrile) in the range of 40-50%. Irregularity of the Van't Hoff analysis was noted over the temperature studied. The plot tends to deviate from linearity at higher operating temperatures (140°C and 150°C) with linear deviation errors of 12.7% and 41.6%, respectively, for the mobile phase examined.
|Uncontrolled Keywords:||column liquid chromatography, high temperature separations, tocopherols and tocotrienols, zirconia stationary phases|
|Subjects:||Q Science > Q Science (General)|
Q Science > QD Chemistry
|Deposited By:||S.N.Shahira Dahari|
|Deposited On:||01 Jun 2011 09:55|
|Last Modified:||13 Jun 2011 06:05|
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