A simultaneous method was successfully established and validated for the separation and determination of bu- prenorphine （BP）, its primary metabolite, nor-buprenorphine （NBP） and a proposed co-formulate, naloxone ...A simultaneous method was successfully established and validated for the separation and determination of bu- prenorphine （BP）, its primary metabolite, nor-buprenorphine （NBP） and a proposed co-formulate, naloxone （NLX） in human plasma. The method used buprenorphine-d4 （BP-D4）, nor-buprenorphine-d3 （NBP-D3）, naltrexone （NTX） as internal standards （ISs）. 100 μL of plasma sample fortified with the ISs was cleaned up by solid-phase extraction （SPE）, and was then separated on a Waters AcquityTM BEH C18 column with gradient elution using methanol and water （containing 0.2% formic） at a flow rate of 0.25 mL·min^-1. The mass spectrometer was used for detection and was operated in the positive electrospray ionization with multiple reaction monitoring （MRM） mode. The three compounds were effectively separated in 5 min. The linear ranges of the compounds were 0.1--25, 0.25--25 and 0.05--25 ng·mL^-1 for BP, NBP and NLX, respectively, with r≥0.9935. The method had high sensitivity （the lim- its of detection were 0.02, 0.1 and 0.01 ng.mL-1 for BP, NBP and NLX, respectively） and high recoveries （≥97.6%）. The result was shown to be linear and satisfactorily met current acceptance criteria for validation of bio- analytical method： intra and inter assay precisions within the required limits of ≤25% RSD. The LOQs fulfilled the LOQ requirements： precision≤25% RSD, and was fully validated according to the State Food and Drug Administration （SFDA） regulations. The results demonstrated that ultra-high performance liquid chromatography- tandem mass spectrometer （UPLC-MS/MS） with SPE was a powerful detection tool and contributed to pharmaceutical analysis in biological matrices.展开更多
Ultra performance liquid chromatography(UPLC) coupled with orthogonal acceleration time-of-flight(oaTOF) mass spectrometry is becoming an effective and high-throughput analytical technique in metabonomics research.In ...Ultra performance liquid chromatography(UPLC) coupled with orthogonal acceleration time-of-flight(oaTOF) mass spectrometry is becoming an effective and high-throughput analytical technique in metabonomics research.In this paper,an UPLC-oaTOF-MS system was employed to investigate the serum profiles of 40 diabete mellitus(DM)/diabetic nephropathy(DN) patients and 25 healthy volunteers in an effort to find potential biomarkers.The UPLC system produced information-rich chromatograms with typical measured peak widths of 4 s,and generated peak capacities of 225 in 15 min.After the UPLC-oaTOF-MS analysis,principal component analysis(PCA) was used for group differentiation and marker selection.In the projection of positive mode,DM/DN patients and the controls were obviously divided into three groups.Furthermore,two potential markers were identified as phytosphingosine and sphinganine,respectively.Phytosphingosine and sphinganine with decreased concentrations in the patients,were closely related to the sphingolipid metabolism.展开更多
芥子气可以与血红蛋白的组氨酸侧链发生反应,生成芥子气暴露染毒的生物标志物。本研究建立了定性、定量检测痕量芥子气暴露染毒人血红蛋白加合物的方法。采用2-氯乙基乙基硫醚(2-CEES)染毒的血红蛋白溶液作为内标,用链霉蛋白酶对芥子气...芥子气可以与血红蛋白的组氨酸侧链发生反应,生成芥子气暴露染毒的生物标志物。本研究建立了定性、定量检测痕量芥子气暴露染毒人血红蛋白加合物的方法。采用2-氯乙基乙基硫醚(2-CEES)染毒的血红蛋白溶液作为内标,用链霉蛋白酶对芥子气-珠蛋白加合物进行酶解,经PPL柱固相萃取纯化以及苄氧羰基氯(Cbz-Cl)衍生,使用超高效液相色谱-串联质谱(UHPLC-MS/MS)进行分析检测。经过优化实验条件,最终选择链霉蛋白酶的酶解温度55℃,酶解时间10.0 h,使用3.0 mL 5%甲醇水溶液淋洗,1.0 mL 50%甲醇水溶液洗脱,Cbz-Cl衍生时间30 min。结果表明,在10.0~1 000μg/L线性范围内,线性关系良好(R^2>0.997),准确度为89.8%~113%,精密度(RSD)不高于12.4%,检出限(LOD)为10.0μg/L(S/N>5)。该方法采用2对离子对进行确证,有助于痕量芥子气暴露染毒的溯源性分析,与传统酸解法相比,该方法样品处理时间短,反应条件温和、操作简单,且灵敏度可提高约150倍。展开更多
文摘A simultaneous method was successfully established and validated for the separation and determination of bu- prenorphine （BP）, its primary metabolite, nor-buprenorphine （NBP） and a proposed co-formulate, naloxone （NLX） in human plasma. The method used buprenorphine-d4 （BP-D4）, nor-buprenorphine-d3 （NBP-D3）, naltrexone （NTX） as internal standards （ISs）. 100 μL of plasma sample fortified with the ISs was cleaned up by solid-phase extraction （SPE）, and was then separated on a Waters AcquityTM BEH C18 column with gradient elution using methanol and water （containing 0.2% formic） at a flow rate of 0.25 mL·min^-1. The mass spectrometer was used for detection and was operated in the positive electrospray ionization with multiple reaction monitoring （MRM） mode. The three compounds were effectively separated in 5 min. The linear ranges of the compounds were 0.1--25, 0.25--25 and 0.05--25 ng·mL^-1 for BP, NBP and NLX, respectively, with r≥0.9935. The method had high sensitivity （the lim- its of detection were 0.02, 0.1 and 0.01 ng.mL-1 for BP, NBP and NLX, respectively） and high recoveries （≥97.6%）. The result was shown to be linear and satisfactorily met current acceptance criteria for validation of bio- analytical method： intra and inter assay precisions within the required limits of ≤25% RSD. The LOQs fulfilled the LOQ requirements： precision≤25% RSD, and was fully validated according to the State Food and Drug Administration （SFDA） regulations. The results demonstrated that ultra-high performance liquid chromatography- tandem mass spectrometer （UPLC-MS/MS） with SPE was a powerful detection tool and contributed to pharmaceutical analysis in biological matrices.
文摘Ultra performance liquid chromatography(UPLC) coupled with orthogonal acceleration time-of-flight(oaTOF) mass spectrometry is becoming an effective and high-throughput analytical technique in metabonomics research.In this paper,an UPLC-oaTOF-MS system was employed to investigate the serum profiles of 40 diabete mellitus(DM)/diabetic nephropathy(DN) patients and 25 healthy volunteers in an effort to find potential biomarkers.The UPLC system produced information-rich chromatograms with typical measured peak widths of 4 s,and generated peak capacities of 225 in 15 min.After the UPLC-oaTOF-MS analysis,principal component analysis(PCA) was used for group differentiation and marker selection.In the projection of positive mode,DM/DN patients and the controls were obviously divided into three groups.Furthermore,two potential markers were identified as phytosphingosine and sphinganine,respectively.Phytosphingosine and sphinganine with decreased concentrations in the patients,were closely related to the sphingolipid metabolism.
文摘芥子气可以与血红蛋白的组氨酸侧链发生反应,生成芥子气暴露染毒的生物标志物。本研究建立了定性、定量检测痕量芥子气暴露染毒人血红蛋白加合物的方法。采用2-氯乙基乙基硫醚(2-CEES)染毒的血红蛋白溶液作为内标,用链霉蛋白酶对芥子气-珠蛋白加合物进行酶解,经PPL柱固相萃取纯化以及苄氧羰基氯(Cbz-Cl)衍生,使用超高效液相色谱-串联质谱(UHPLC-MS/MS)进行分析检测。经过优化实验条件,最终选择链霉蛋白酶的酶解温度55℃,酶解时间10.0 h,使用3.0 mL 5%甲醇水溶液淋洗,1.0 mL 50%甲醇水溶液洗脱,Cbz-Cl衍生时间30 min。结果表明,在10.0~1 000μg/L线性范围内,线性关系良好(R^2>0.997),准确度为89.8%~113%,精密度(RSD)不高于12.4%,检出限(LOD)为10.0μg/L(S/N>5)。该方法采用2对离子对进行确证,有助于痕量芥子气暴露染毒的溯源性分析,与传统酸解法相比,该方法样品处理时间短,反应条件温和、操作简单,且灵敏度可提高约150倍。
