PMID- 17120813 OWN - NLM STAT- MEDLINE DCOM- 20070830 LR - 20191110 IS - 1615-9306 (Print) IS - 1615-9306 (Linking) VI - 29 IP - 15 DP - 2006 Oct TI - High performance liquid chromatography for the determination of glucosamine sulfate in human plasma after derivatization with 9-fluorenylmethyl chloroformate. PG - 2296-302 AB - In this study, we developed a simple, rapid, sensitive, and reliable method for the determination of glucosamine sulfate in human plasma, which was based on derivatization with 9-fluorenylmethyl chloroformate (FMOC-Cl) followed by reverse-phase HPLC-FLD. For the first time, FMOC-Cl was introduced into derivatization of glucosamine sulfate in human plasma. The amino groups of glucosamine sulfate and vertilmicin sulfate (the internal standard) were trapped with FMOC-Cl to form glucosamine-FMOC-Cl and vertilmicin-FMOC-Cl adducts, which can be very suitable for HPLC-FLD. Precipitation of plasma proteins by acetonitrile was followed by vortex mixing and centrifugation. Chromatographic separation was performed on a C18 column (DIAMONSIL 150 x 4 mm id, 5 microm) with a mobile phase gradient consisting of acetonitrile and water at a flow-rate of 1 mL/min. The retention times of glucosamine-FMOC-Cl and vertilmicin-FMOC-Cl adducts were 8.9 and 21.2 min, respectively. This method was shown to be selective and sensitive for glucosamine sulfate. The limit of detection was 15 ng/mL for glucosamine sulfate in plasma and the linear range was 0.1-10 mg/mL in plasma with a correlation coefficient (r) of 0.9999. The relative standard deviations (RSDs) of intra-day and inter-day assays were 5.2-8.1% and 6.1- 8.5%, respectively. Extraction recoveries of glucosamine sulfate in plasma were greater than 90%. The validated method was successfully applied to the determination of glucosamine sulfate in human plasma samples. FAU - Huang, Tao-min AU - Huang TM AD - Department of Pharmacy, Fudan University, Shanghai, PR China. FAU - Deng, Chun-Hui AU - Deng CH FAU - Chen, Nian-zhu AU - Chen NZ FAU - Liu, Zhen AU - Liu Z FAU - Duan, Geng-Li AU - Duan GL LA - eng PT - Journal Article PL - Germany TA - J Sep Sci JT - Journal of separation science JID - 101088554 RN - 0 (Fluorenes) RN - 0 (Indicators and Reagents) RN - 9PLB0BTT90 (1-(9-fluorenyl)methyl chloroformate) RN - N08U5BOQ1K (Glucosamine) SB - IM MH - Blood Chemical Analysis/methods/statistics & numerical data MH - Chromatography, High Pressure Liquid/*methods/statistics & numerical data MH - Dietary Supplements/analysis MH - Fluorenes MH - Glucosamine/administration & dosage/*blood MH - Humans MH - Indicators and Reagents MH - Sensitivity and Specificity EDAT- 2006/11/24 09:00 MHDA- 2007/08/31 09:00 CRDT- 2006/11/24 09:00 PHST- 2006/11/24 09:00 [pubmed] PHST- 2007/08/31 09:00 [medline] PHST- 2006/11/24 09:00 [entrez] AID - 10.1002/jssc.200600162 [doi] PST - ppublish SO - J Sep Sci. 2006 Oct;29(15):2296-302. doi: 10.1002/jssc.200600162.