RP-HPLC法测定家兔血浆中甲苯喹哌浓度和药代动力学参数

本文建立了以紫外230nm波长检测的反相高效液相色谱法(RP-HPLC)测定家兔血浆中甲苯喹派浓度。填料使用LiChrosorb RP-C18,流动相为甲醇—水—三乙胺—磷酸(63:37:1:0.8 v/v),血样(或尿样)经碱化后用乙醚提取,再以0.2 mol/L硫酸回提,进样。方法回收率为99.84±3.10(SD)%;天内、天间精密度平均CV为4.12%及3.95%(n=5);最低检测限3ng.经提取的标准线性浓度在25～2000 ng/ml范围内,Y=0.002865X-0.01346,r=0.9999,内源性物质及可能的合并用药不干扰色谱测定。文内用质谱法鉴定血样中甲苯喹哌色谱峰纯度,并由尿样分析对其主要代谢物予以初步验证。本法可应用于药代动力学参数测定。家兔按8mg/kg静注后,药—时曲线符合二室模型T_(1/2)=4.8008±1.1522(SD)h。     

测定泰必利血药及尿药浓度的反相高效液相色谱法研究

用国产高效液相色谱仪、反相填料YWG-C₁₈H₃₇及甲醇—三乙胺(10000:0.40)为流动相,研究并建立了测定泰必利血药及尿药浓度的高效液相色谱法。该法具有灵敏、准确、可靠及快速等优点。血样或尿样用7 ml二氯甲烷一次提取,浓缩后进样。泰必利及内标胃复安的保留时间分别为4.50及8.25 min。泰必利标准溶液的检测限为5ng;从标准血样或尿样提取的最低检测浓度分别为0.05μg/ml血清及0.08μg/ml尿液(S/N≥2)。经提取的标准曲线相关系数大干0.99,方法回收率大于98%,日内日间测定的CV小于2.5%。     

高效液相色谱法测定血清及尿中卡那霉素含量

本文研究了血清及尿中卡那霉素的高效液相色谱测定法。血样用乙腈去蛋白、尿样用水稀释后,经邻苯二醛衍生化,衍生物经色谱分离,荧光检测。最低检测浓度:血样为0.2μg/ml,尿样为2μg/ml;平均回收率:血样为98.3%(SD=4.1),尿样为98.2%(SD=2.3);日内变异系数:血样及尿样均低于4%;日间变异系数:血样不大于5.4%,尿样不大于5.7%;线性浓度范围:血样为4～40μg/ml,尿样为50～500μg/ml。     

高效液相色谱法测定人血浆中盐酸吡格列酮浓度

目的建立以高效液相色谱法测定盐酸吡格列酮血药浓度的方法。方法色谱柱为HypersilC18(150mm×4.6mm,5μm),流动相为乙腈-磷酸盐缓冲液(40∶60,V/V),流速为1.0ml/min,检测波长为229nm,血样用二氯甲烷萃取。结果线性浓度范围为25～4000ng/ml(r=0.9998,n=8),最低检测浓度为25ng/ml;高、中、低3种浓度的提取回收率分别为(73.33±1.22)%、(76.92±6.57)%、(84.50±3.40)%,方法回收率分别为(103.26±3.31)%、(97.31±9.07)%、(99.61±6.48)%;日内RSD<4.30%,日间RSD<8.17%(n=25)。结论本法能够满足盐酸吡格列酮血药浓度测定及人体药动学研究的需要。     

SPE-HPLC法测定人血浆中喹那普利和代谢产物及其人体药代动力学研究

目的:建立 SPE—HPLC 法测定人血浆中喹那普利及其代谢产物喹那普利拉的浓度,以研究喹那普利及喹那普利拉在健康志愿者中的药代动力学和相对生物利用度。方法:应用 C_(18)固相萃取柱提取血浆中喹那普利及喹那普利拉,喹那普利色谱条件为:迪马 Diamonsil C_(18)柱(150 mm×4.6 mm,5μm);流动相为乙腈-0.1%醋酸溶液(40:60,v/v);流速1.0 mL·min~(-1)。喹那普利拉色谱条件为:Phenomenex C_(18)柱(150 mm×4.6 mm,5μm);流动相为乙腈-0.005 mol·L~(-1)十二烷基磺酸钠(磷酸调 pH 2.5)(40:60,v/v);流速1.0 mL·min~(-1)。人体药代动力学试验采用单剂双周期交叉设计方案,将18名志愿者随机分为两组,分别口服参比制剂喹那普利片和试验制剂喹那普利胶囊各40 mg,清洗期为1周。结果:喹那普利的线性范围为10～800ng·mL~(-1),r=0.9931,最低定量限为10 ng·mL~(-1);提取回收率与方法回收率分别为82.1%～94.4%,92.6%～99.9%;日内、日间 RSD 均小于10%。喹那普利拉的线性范围为20～1200 ng·mL~(-1),r=0.9995,最低定量限为20 ng·mL~(-1);提取回收率与方法回收率分别为73.3%～94.0%,100.0%～105.9%;日内、日间 RSD 均小于7%。结论:本方法灵敏度高、特异性强、重复性好,测定结果可靠,统计学分析表明2种制剂的主要药代动力学参数无显著性差异,为等效制剂。     

HPLC-紫外法测定人血浆中芬太尼浓度

目的 :建立高效液相色谱法 -紫外检测器测定人血浆中芬太尼浓度的方法。方法 :本实验采用外标法 ,以Shim -PackCLC -ODS(6 0mm×150mm ,5μm )为固定相 ,含0 015mol/LNaH2PO4 的乙腈 -水溶液 (30∶70 ,v/v)为流动相 ,流速1 5ml/min ,紫外检测波长195nm。结果 :标准曲线在2 0～100ng/ml范围内线性关系良好 (r=0 999) ,最低检测浓度为1ng/ml,方法回收率为(91 70±4 70) % ,提取回收率为 (97 38±3 69) % ,日内变异RSD (6 50±2 79) % ,日间变异RSD (6 70±3 04) %。结论 :本方法简便 ,准确 ,检测浓度低 ,能够满足血浆中低浓度芬太尼的测定及临床药代动力学研究的要求。     

HPLC法测定更昔洛韦在家兔房水内的浓度及其市售滴眼液的药动学研究

目的:建立了HPLC法检测更昔洛韦在家兔房水内药物浓度的方法,并研究更昔洛韦滴眼液在家兔眼内的药动学行为.方法:房水样品用20 %(v/v)高氯酸沉淀蛋白后取上清液直接进样,HPLC法测定.色谱柱使用LiChrospher C18柱(150 mm×4.6 mm,5 μm);流动相为乙腈-0.05 mol·L-1醋酸铵水溶液(0.4:99.6,v/v);流速为 1.0 mL·min-1;柱温为30℃;检测波长为 254 nm.结果:房水样品中药物浓度在 40.0 ng·mL-1～ 400.0 ng·mL-1的范围内呈良好的线性关系,方程为A=84.786c 6254.7,r=0.9994(n=10).低中高3种浓度的方法学平均回收率为97.0%、98.7%和102.4%,高中低3种浓度提取回收率均符合要求.日间和日内精密度均小于5%.最低检测限(LOD)为 20.0 ng·mL-1.家兔药动学参数:T1/2α:(1.95±0.78) h , T1/2β: (26.46±8.84 )h, AUC0→48: (10184±3437)ng·mL-1·h-1, Tpeak:(1.500±0.40)h, Cmax:(258.80±67.60 )ng·mL-1.研究表明,市售更昔洛韦滴眼液药时曲线符合二室模型一级吸收.结论:该方法专属性强、灵敏度高、重现性好,适合于GCV在家兔房水内的药物浓度测定及其在眼内的药代动力学研究.     

高效液相色谱-质谱法测定大鼠血浆中硫酸酯型脱氢表雄酮和孕烯醇酮

目的:建立同时测定SD大鼠血浆中脱氢表雄酮硫酸酯(DHEAS)和孕烯醇酮硫酸酯(PREGS)的高效液相色谱-质谱法。方法:选择雌酮硫酸酯(ES)作为内标。SD大鼠的血浆使用乙腈沉淀除去蛋白后,经固相萃取,水解,衍生化后,以高效液相色谱-质谱测定脱氢表雄酮硫酸酯和孕烯醇酮硫酸酯的浓度,采用大气压化学离子源(HPLC/APCI-MS),选择离子检测方式。结果:血浆中脱氢表雄酮硫酸酯和孕烯醇酮硫酸酯线性范围分别为:0.050~2.00ng,0.030~2.00ng,相关系数分别为0.9990和0.9979。低、中、高浓度血样的提取回收率在66.8%~82.3%之间,相对回收率为:98.4%~111.6%,日内、日间变异均小于15%。正常SD大鼠的血浆脱氢表雄酮硫酸酯和孕烯醇酮硫酸酯分别为0.070±0.020ng/ml、0.13±0.031ng/ml。结论:本实验方法具有灵敏度高、准确度好及变异较小的特点,适合测定SD大鼠血浆中脱氢表雄酮硫酸酯和孕烯酮硫酸酯的含量。     

丙硫咪唑在猪体内的药物动力学研究

本文报道广谱抗寄生虫药丙硫咪唑在猪体内的药物动力学研究。选用6头健康杂种猪,体重为38.0±4.6kg,按10ng/kg的剂量胃管灌服丙硫咪唑混悬液,服药前后按计划定时从前腔静脉采集血样。用乙醚萃取法提取血浆中的药物,反相高效液相色谱法同时测定血浆丙硫咪唑及其代谢产物丙硫咪唑亚砜及砜的浓度。测定时以甲苯咪唑为内标,色谱条件:Zorbax ODS柱(25cm×4.6mm),流动相为甲醇:水(80:20.V/V),流速1.0ml/mir,UV检测波长292nm.测定结果表明,在给药后3分钟采的血样已不能测到丙硫咪唑的原形药物,而其两种主要代谢产物亚砜及砜在给药后36小时仍可测到(最低检测限:亚砜及砜均为0.02μg/ml)。亚砜及砚的主要动力学参数分別是:峰浓度3.22±0.39、1.91±0.80μg/ml,真达峰时间10.00±5.93、20.67±4.46小时,消除半衰期5.93±2.31、9.17±2.30小时,药时曲线下面积52.38±10.73、32.23±9.10μg.h/ml.丙硫咪唑在猪体内的抗蠕虫活性目前认为是由于在肝脏代谢生成的产物亚砜的作用。     

反相高效液相色谱法测定乙酰麦迪霉素血药浓度

应用反相高效液相色谱法测定乙酰麦迪霉素血清浓度。色谱柱为ODS O₁₈柱,流动相为甲醇一水(80:20,v/v),流速1.0 ml/min,检测波长254 nm,柱温25℃。线性范围在10～300 ng/ml,检测下限为10 ng/ml 高、低浓度平均回收率分别为101.02%和105.44%,日内,日间测定RSD 分别为5.12%(n=10)和7.38%(n=7)。应用本法测定健康人单剂量日服乙酰麦迪霉素干糖浆后的血药浓度,结果满意。     

HPLC法检测替硝唑葡萄糖注射液中5-HMF

目的建立一种快速、灵敏、准确的高效液相色谱法测定替硝唑葡萄糖注射液中5-羟甲基糠醛（S-HMF）的含量。方法HPLC法，以Hypersil ODS2 C18（4.6mm×250mm，5pm）为色谱柱，流动相：甲醇：水：冰乙酸（38：62：0.8），柱温：30℃；流速1.0ml/min，检测波长为284nm。结果5-羟甲基糠醛在0.5~2.5μg/ml浓度范围与峰面积有良好线性关系，r=1.000。平均回收率为101.1%，RSD=1%（n=9）。结论本方法准确、简便、快捷。排除了替硝唑的干扰，可用于测定替硝唑萄萄糖注射液中5-羟甲基糠醛含量。     

反相高效液相色谱法测定(E)-3-(4-((3,5,6-三甲基吡嗪-2-基)甲氧基)-3-甲氧基苯基)丙烯酸在SD大鼠血浆中的浓度

目的 建立测定SD大鼠血浆中(E)-3-(4-((3,5,6-三甲基吡嗪-2-基)甲氧基)-3-甲氧基苯基)丙烯酸浓度的反相高效液相色谱(LC-UV)方法,并用于其在SD大鼠体内的药动学研究。方法 采用Diamonsil-C₁₈(2)柱(100 mm×4.6 mm,5 μm),以乙腈:水(含5 mM的醋酸铵,用醋酸调节pH至4.0)=30:70为流动相,测定70只SD大鼠单剂量尾静脉给药15 mg/kg后不同时刻血浆中药物的浓度,并由此计算其在SD大鼠体内的药动学参数。结果 SD大鼠     

高效液相色谱法测定右旋儿茶素血浆浓度及药代动力学参数

本文建立了体液中右旋儿茶素的RP-HPLC测定方法。采用C_(18)键合相硅胶为填料的固相提取柱进行样品预处理,右旋儿茶素的提取回收率为79.8%.应用二极管阵列检测器对色谱峰纯度进行鉴定。该法精密度好,方法回收率近100%,日内、日间的变异系数为2.4～5.6%,血浓69.6～1160 ng/ml范围内呈线性关系,r=0.9993。家兔静注右旋儿茶素18mg/kg,其药代动力学过程符合二室模型,分布相半衰期为0.129 h,消除相半衰期为1.19h。     

Determination of paroxetine in human saliva by reversed-phase high-performance liquid chromatography with UV detection.

A rapid and sensitive high-performance liquid chromatographic method was validated and described for determination of paroxetine in human saliva. Following liquid-liquid extraction of the drug and an internal standard (dibucaine), chromatographic separation was accomplished using a C18 analytical column with a mobile phase consisting of 0.05 mol/L sodium phosphate buffer, pH 5.0, and acetonitrile (A 30:70, v/v; B 60:40, v/v). Paroxetine and the internal standard were detected by ultraviolet absorbance at 205 nm. The average recoveries of the drug and internal standard were 92.5% and 89%, respectively. The lower limits of detection and quantification were 1 and 4 ng/ml, respectively, and the calibration curve was linear over a concentration range of 4 ng/ml. The saliva level of paroxetine in patients with depression taking 10 to 40 mg/day of the drug was significantly correlated with the plasma level of paroxetine in each patient (r = 0.617, P < 0.004, n = 19). These data indicate that the saliva level of paroxetine could be a useful marker to predict the plasma level of the drug.     

高效液相色谱法测定家兔血浆中Z－47浓度及其在药代动力学研究中的应用

本文建立了测定家兔血浆中Ｚ－４７（３Ｈ－１，２－二氢－２－（４－甲基苯胺基）甲基－１－吡咯里嗪酮）的高效液相色谱法。选用μ－ＢｏｎｄａｐａｋＣ１８色谱柱，流动相为甲醇－磷酸二氢铵缓冲液（ｐＨ＝４）（３：２，Ｖ／Ｖ）。以安定为内标物。血浆样品先经碱化，用乙醚－正己烷（１：１，Ｖ／Ｖ）提取，分离有机相，再以１０％磷酸萃取，水相２０μＬ进样，紫外检测波长２９０ｎｍ。本法专属性强，精密度、准确性符合有关要求，操作简便。对６只家兔口服给药后应用本法成功地进行了初步的药代动力学研究。     

A simple and rapid HPLC method for the determination of atorvastatin in human plasma with UV detection and its application to pharmacokinetic studies

A rapid and sensitive high-performance liquid chromatographic method for the determination of atorvastatin (CAS 134523-00-5) in plasma was developed in this study. Atorvastatin was isolated from plasma using protein precipitation by acetonitrile. Diltiazem (CAS 33286-22-5) was used as internal standard. The chromatographic conditions were as follows: analytical 125 x 4 mm (i.d.) Nucleosil C8 column (5 microm particle size), mobile phase consisting of sodium dihydrogen phosphate buffer-acetonitrile (60:40, v/v) adjusted to pH 5.5 at a flow rate of 1.5 ml/min, UV detection at 245 nm. The detection limit for atorvastatin in plasma was 1 ng ml(-1). The calibration curve was linear over the concentration range 20-800 ng ml(-1). The recovery was complete. The inter-day and intra-day assay coefficients of variation were found to be less than 7%. The present validated method was successfully used for pharmacokinetic studies of atorvastatin in human subjects.     

反相高效液相色谱法测定大蒜素的血药浓度

目的：建立反相高效液相色谱法测定血清中大蒜素的浓度。方法：血清样品用１０％三氯醋酸沉淀蛋白,正己烷提取后进样。采用Ｐｈｅｎｏｍｅｎｅｘ Ｃ１８（２５０ｍｍ × ４．６ｍｍ,５μｍ）柱;流动相：乙腈－１％冰醋酸（６２：３８,Ｖ／Ｖ）,ｐＨ＝３．５;流速：１．２ｍｌ／ｍｉｎ,在室温下;波长：２４０ｎｍ检测。结果：该方法回收率为（９９．２±６．６）％,最低检测浓度为０．１８μｇ／ｍｌ,大蒜素血药浓度在０．２９～１２．４μｇ／ｍｌ范围内峰面积与浓度线性关系良好（ｒ＝０．９ ９７７）,日内 ＲＳＤ＜５．５％（ｎ＝５）,日间 ＲＳＤ＜５．８％（ｎ＝５） 结论：本法快速、准确、灵敏,能较好满足大蒜素临床药代动力学研究的需要。     

Determination of ABT-089 in human plasma by high performance liquid chromatography using in situ precolumn derivatization with 7-fluoro-4-nitrobenzo-2-oxa-1,3-diazole

ABT-089 is a potent, selective neuronal cholinergic channel modulator with cognition enhancing activity in several animal paradigms. A simple and sensitive chromatographic method for the specific determination of ABT-089 in human plasma has been developed and validated. The method utilizes in situ precolumn fluorescence derivatization of the sample with 7-fluoro-4-nitrobenzo-2-oxa-1,3-diazole (NBD-F) prior to liquid-liquid extraction followed by reverse phase HPLC and fluorescence detection (lambda(ex) 495 nm, lambda(em) 533 nm). The described method significantly simplifies sample preparation. The derivatized product was separated from interference using a YMC ODS-AQ, 5 microm, 250x4.6 mm i.d. column using a mobile phase consisting of 30:5:65 (v:v:v) acetonitrile/methanol/aqueous buffer at a flow rate of 0.75 ml min(-1). The aqueous buffer consisted of 0.01 M tetramethylammonium perchlorate, 0.1% (v:v) trifluoroacetic acid, pH 3.0. An Alltech Absorbosphere CN, 5 microm, cartridge guard column was also used before the analytical column. Plasma samples were alkalinized with 0.1 M NaHCO3, 300 microl of a 1 mg ml(-1) ethanolic solution of NBD-F was added and the samples were heated in a water bath for 10 min at 50 degrees C. The samples were then extracted with tert-butylmethylether, evaporated to dryness and then reconstituted in mobile phase. For 1 ml of plasma, a limit of quantitation (LOQ) of 1.6 ng ml(-1) was obtained. The method was linear from 1.6 to 836 ng ml(-1). Inter and intra-day assay RSD (n = 6) were less than 9%. Accuracy determinations showed the quality control samples to range between 88-114% of the theoretical concentration.     

高效液相色谱-质谱-质谱联用法测定人血浆中艾司西酞普兰浓度及其药代动力学研究

目的建立测定人血浆中艾司西酞普兰浓度的高效液相色谱-质谱-质谱联用法.方法血浆样品经甲醇沉淀后进行分析.色谱柱Lichrospher CN柱150 mm×4.6 m I.D.5μm,流动相甲醇水(含15 mmol·L-1乙酸铵)甲酸(72∶28O.1,v/v/v),流速1.0ml·min-1,电喷雾离子化三重四极杆串联质谱检测,以选择离子反应监测(SRM)扫描方式进行检测,采用选择离子反应监测(SRM)方式进行定量分析,用于监测的离子为m/z 325.0→234.0(西酞普兰)和m/z 409.1→238.1(氨氯地平,内标).结果线性范围为0.20～50.00ng·ml-1,最低定量浓度为0.20 ng·ml-1,应用此法测试了10名健康受试者口服草酸艾司西酞普兰片(10 mg)后不同时间的血药浓度,得到艾司西酞普兰药动学参数,Cmax为9.21±2.10 ng·ml-1,Tmax为3.75±1.04h,AUC0-t为514.6±152.3 ng·h·ml-1,AUC0-∞为540.5±162.3 ng·h·ml-1,t1/2为34.06±7.71 h及Ke为0.021±O.004h-1.结论该法专属、灵敏、简便、快速,适用于人血浆中艾司西酞普兰浓度的测定.     

Development and validation of a sensitive HPLC method for the determination of lisinopril in human plasma after derivatization with 4-fluoro-7-nitro-2,1,3-benzoxadiazole

In this study, we developed a simple and sensitive HPLC method for the determination of lisinopril in human plasma. The sample clean-up was carried out by solid-phase extraction (SPE) using a cation-exchange (Strata-SCX^®) extraction cartridge. After a pre-column derivatization with 4-fluoro-7-nitro-2,1,3-benzoxadiazole, the reaction mixture was analyzed on an Agilent Zorbax SB^®-C₁₈ (150 mm×4.6 mm, 5 μm). The flow rate was set at 1.0 mL/min. Fluorescence detection was performed at an excitation wavelength of 470 nm and an emission wavelength of 530 nm. The mobile phase consisted of a mixture of methanol and 0.02 M sodium dihydrogen phosphate (pH = 3.0, 60:40, v/v). The average extraction recovery of lisinopril and fluvoxamine (internal standard) was >85%. The method exhibited a linear calibration curve over the concentration range of 1–1000 ng/mL with a correlation coefficient (r²) of ≥0.98 and a limit of quantification (LOQ) equal to 2 ng/mL. The within-run and between-run precisions were satisfactory with an RSD of 3.8%–13.7% (accuracy: from 95.0% to 96.4%) and 4.273%–14.3% (accuracy: from 94.4% to 98.5%), respectively.