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- W2067596945 abstract "A simple, sensitive and precise isocratic HPLC method for the determination of total homocysteine in human plasma is described. The thiol compounds were liberated from plasma proteins by reduction with tri-n-butylphosphine and derivatized with a thiol-specific fluorogenic marker, 7-fluoro-benzo-2-oxa-1,3-diazole-4-sulphonate. The derivatives were separated isocratically within 7 min by reversed-phase HPLC using a Superspher 100 RP-18 column as stationary phase. By using this approach more than 200 samples a day can be assayed for total homocysteine. The method was linear up to 100 mumol/l and proved to be sensitive with a detection limit of 0.1 mumol/l and the lowest limit of reliable quantification of 0.5 mumol/l for homocysteine in buffer. Intra- and inter-assay coefficients of variation were both < 4% at a concentration of 10 mumol/l homocysteine. Similar results were obtained for homocysteine concentrations between 0.5 and 100 mumol/l. The analytical recovery for these concentrations ranged from 94.9 to 117.0%. As compared to other protocols published so far, this modified method is less complicated but equally sensitive and reproducible and allows a rapid determination of total homocysteine and cysteine in human plasma under routine conditions." @default.
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- W2067596945 date "1997-01-01" @default.
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- W2067596945 title "Determination of Total Homocysteine in Human Plasma by Isocratic High-Performance Liquid Chromatography" @default.
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- W2067596945 doi "https://doi.org/10.1515/cclm.1997.35.9.687" @default.
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