Liquid Chromatographic Determination of Cyclosporine-A in Blood, with Chromosorb P Columns Used for Sample Purification
A fast liquid-chromatographic determination of whole-blood cyclosporine A concenration is described. A sample preparation consisting of diethyl ether extraction and Chromosorb P column purification of extract, requires 1 mL of whole blood and takes 10 min of technical effort per sample. A reversed-p...
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Veröffentlicht in: | Journal of liquid chromatography 1991-06, Vol.14 (9), p.1683-1690 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A fast liquid-chromatographic determination of whole-blood cyclosporine A concenration is described. A sample preparation consisting of diethyl ether extraction and Chromosorb P column purification of extract, requires 1 mL of whole blood and takes 10 min of technical effort per sample. A reversed-phase C
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column (5-μm particles) is used, with acetonitrile/methanol/water (20/45/35 by vol) as mobile phase. Cyclosporine A is quantified by absorbance at 214 nm, with cyclosporine D as internal standard. Chromatographic development is complete in 8 min. Linearity is verified by a five-point calibration curve in the range 50-900 μg/L, correlation coefficient r>0.998, y = 0.001x − 0.053. Lower limit of sensitivity is 25 μg/L. Extraction efficiency was over 70%, accuracy varied between −7.1% and +3.3%s, CVs were |
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ISSN: | 0148-3919 2331-0413 |
DOI: | 10.1080/01483919108049645 |