Simultaneous determination of fat- and water-soluble vitamins by microemulsion electrokinetic chromatography |
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Authors: | E P Svidritskii E B Pashkova A V Pirogov O A Shpigun |
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Institution: | 1.Department of Chemistry,Moscow State University,Moscow,Russia |
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Abstract: | A new procedure was developed for the simultaneous determination of water- and fat-soluble vitamins by microemulsion electrokinetic
chromatography. Using microemulsions based on sodium dodecyl sulfate, Brij 35, 1-butanol, and heptane, 10 vitamins were separated
(4 water-soluble and 6 fat-soluble) within 35 min. The efficiency of the separation was 800000 theoretical plates (effective
capillary length, 40 cm). To enhance the selectivity, 2-propanol was used as a hydrophobizing addition into the microemulsion.
The procedure was used for analyzing a kaolin-based vitamin premix. The use of microemulsion as an agent for extracting vitamins
from the support considerably simplifies the sample preparation. |
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