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Merck
CN
  • Analytical capillary isotachophoresis: a routine technique for the analysis of lipoproteins and lipoprotein subfractions in whole serum.

Analytical capillary isotachophoresis: a routine technique for the analysis of lipoproteins and lipoprotein subfractions in whole serum.

Journal of chromatography (1985-02-22)
G Schmitz, U Borgmann, G Assmann
摘要

A capillary isotachophoretic separation technique was developed for lipoproteins in native serum which, compared with previous electrophoretic techniques, has negligible molecular sieve effects, does not need gel casting, is suitable for whole serum and has a high discriminative power for lipoprotein subfractions. The technique is based on pre-staining whole serum lipoproteins for 30 min at 4 degrees C before separation of 0.5 microliter of the sample in a free-flow capillary system (0.5 mm I.D.) with discontinuous buffer system. In normolipidaemic sera, high-density (HDL) and low-density lipoproteins (VLDL) are separated into two major subpopulations according to their net electric mobility. The identification of these fractions was confirmed by substitution with ultracentrifugally isolated lipoproteins and by their complete absence from Tangier and abetalipoproteinaemic serum. Triglyceride-rich very low-density lipoproteins (VLDL) revealed a defined zone between the HDL and LDL subpopulations. Our preliminary results indicate that the separation of human whole serum lipoproteins by capillary isotachophoresis is a promising method for the determination of lipoprotein subfractions.

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