高效液相色谱-质谱联用法同时测定人血浆中盐酸非索非那定和盐酸伪麻黄碱的浓度

目的建立高效液相色谱-质谱联用法同时测定人血浆中盐酸非索非那定和盐酸伪麻黄碱的方法。方法以苯乙双胍为内标,采用C18柱,流动相由乙腈及30mmol/mL醋酸铵(含0.1%甲酸和0.01%三氟乙酸)组成,采用梯度洗脱程序,血浆样品经简单的乙腈沉淀蛋白萃取后,电喷雾离子化源,选择性正离子反应监测,测定血浆中盐酸非索非那定和盐酸伪麻黄碱的浓度。结果非索非那定和伪麻黄碱分别在2.26~676.46ng/mL和22.11~736.96ng/mL线性关系良好。非索非那定高、中、低浓度测定的相对回收率分别为109.9%、103.1%和101.5%,日内RSD分别为2.1%、2.5%和9.8%,日间RSD分别为1.3%、5.7%和7.1%,定量下限浓度为2.26ng/mL,RSD为0.7%。伪麻黄碱高、中、低浓度测定的相对回收率分别为89.3%、97.1%和104.1%,日内RSD分别为6.1%、4.9%和6.0%,日间RSD分别为4.8%、5.7%和9.4%,定量下限浓度为23.16ng/mL,RSD为2.7%。结论所建方法简便、快速,重现性好,专属性强,灵敏度高,适合测定非索非那定和伪麻黄碱的血药浓度,可用于盐酸非索非那定和盐酸伪麻黄碱复方制剂的临床药代动力学研究。     

Determination of pinostrobin in rat plasma by LC-MS/MS: application to pharmacokinetics

A rapid and sensitive method for the determination of pinostrobin in rat plasma was developed using liquid chromatography tandem mass spectrometry (LC-MS/MS) for the first time. Isoliquiritigenin was used as an internal standard in rat plasma. Chromatographic separation was performed on an HiQ Sil C₁₈ column with isocratic elution at a flow rate of 1 mL/min. The mobile phase consisted of water and methanol (9:91, v/v) containing 0.1% formic acid. The quantification limit was 10 ng/mL within a linear range of 10-1000 ng/mL (R = 0.9984). The intra- and inter-day assay precision ranged from 3.8-5.3% to 3.2-5.2%, respectively, and the intra- and inter-day assay accuracy was between 93.2-95.1% and 95.5-104.3%, respectively. Our results indicated that the LC-MS/MS method is effective for pharmacokinetic study of pinostrobin in rat plasma.     

LC-MS/MS 法测定人尿液中氯法拉滨的浓度

目的建立高效液相色谱-串联质谱（LC-MS/MS）方法测定人尿样中氯法拉滨的浓度。方法采用AB SCIEX QTRAP 5500串联质谱仪及Agilent1200高效液相色谱仪进行检测。尿样经甲基叔丁基醚提取处理,以克拉屈滨为内标。色谱柱为ThermoC18柱（150mm×4.6mm,5μm）,流动相为乙腈—4mM乙酸铵（含0.3%的甲酸）（250∶3,v/v）;流速为0.5mL·min-1。氯法拉滨和克拉屈滨的MRM扫描离子通道m/z分别为304.2→170.0,286.1→170.0。进样量：10μL。结果氯法拉滨和克拉屈滨分离良好,保留时间分别为3.77min,3.88min。氯法拉滨在2.5~500ng·mL-1范围内线性关系良好（r=0.9995）,日内、日间RSD均低于6.39%,准确度（RE）均低于10.17%。结论本法样品预处理简便快捷,检测结果专属性强,灵敏度好,准确度高,适用于氯法拉滨药代动力学的研究。     

LC-MS/MS法测定人血浆中加巴喷丁的浓度及其药动学研究

建立液相色谱串联质谱(LC-MS/MS)法测定人血浆中加巴喷丁的浓度并将其应用于人体药动学研究。取血浆样品经甲醇沉淀蛋白后,以甲醇0.2%甲酸水溶液(80∶20)为流动相,用Inertsil ODS-3 C18柱(50 mm×2.1 mm ID,3μm)分离,采用电喷雾离子源,以多反应监测(MRM)方式进行正离子检测,定量分析的离子反应分别为m/z 172→m/z 154(加巴喷丁)和m/z 130→m/z 71(内标二甲双胍)。加巴喷丁线性范围为40.8～8.16×103 ng.mL 1,定量限为40.8 ng.mL 1,每个样品测试时间仅2.2 min,日内、日间精密度(RSD)均小于12%,准确度(RE)在±6.4%范围内。应用此法研究了20名健康志愿者单剂量口服加巴喷丁胶囊600 mg后的药动学特点。该方法快速、专属、灵敏、适用性强,可应用于加巴喷丁的人体药动学研究。     

液相色谱-串联质谱法测定人血浆中的利培酮

利培酮为苯并异噁唑类化合物,通过阻断5-HT2受体和多巴胺D2受体发挥抗精神病作用.同其他抗精神病药物相比,利培酮所引起的椎体外系副作用更少,药效更为明显 .     

Quantification of tulobuterol,a selective β2 adrenergic agonist,in human plasma by liquid chromatography-tandem quadrupole mass spectrometry

A simple and highly sensitive method coupled with liquid chromatography-tandem quadrupole mass spectrometry (LC-MS/MS) was developed and validated for the determination of tulobuterol in human plasma. Sample was preparated by liquid-liquid extraction with i-propanol–n-hexane (5:95, v/v). Tulobuterol and tulobuterol-d9 (internal standard, IS) were separatedon a 300 Extend C₁₈ column(4.6 mm×150 mm, 5 µm), using 0.1%formic acid (A)–acetonitrile (B) (30:70, v/v) as the mobile phase at the flow rate of 1.0 mL/min with an approximately 1:1 split entering the mass spectrometer. Detection was performed by positive electrospray ionization mass spectrometry multiple reaction monitoring of the precursor-to-product ion transition of tulobuterol at m/z 228.1→m/z 154.0 and tulobuterol-d9 atm/z 237.2→m/z 154.0. The assay was linear over the range 0.01–5.0 ng/mLwith a lower limit of quantitation of 0.01 ng/mL. The intra- and inter-day precisions were 3.7% and 11.1%, respectively. Recoverywas approximately 66%, and matrix effects were minimal. This method also showed satisfactory sensitivity, specificity, and carryover. The method was successfully applied to a pharmacokinetic study of tulobuterol in healthy volunteers who were given the tulobuterol patch containing 2 mg tulobuterol.     

LC/MS/MS法测定人血浆中头孢克肟含量

目的 建立人血浆中头孢克肟的LC/MS/MS法.方法 血浆样品经蛋白沉淀提取,采用C8色谱柱分析,以乙腈:水:甲酸(40:60:0.5,v/v/v)为流动相,三重四级杆质谱检测器,正离子多反应监测模式(MRM),监测离子分别为:m/z 454.3→m/z 285.2(头孢克肟),m/z 282.2→m/z 212.2(...     

Quantitative determination of rosuvastatin in human plasma by ion pair liquid-liquid extraction using liquid chromatography with electrospray ionization tandem mass spectrometry

A simple and sensitive liquid chromatography/tandem mass spectrometry method was developed and validated for the quantification of rosuvastatin in human plasma. After being treated with acetic acid and tetrabutyl ammonium hydroxide, the analyte was extracted by simple one-step liquid-liquid extraction with the internal standard (IS: estrone). The chromatographic separation was performed on a Phenomenex Luna C18 column with a mobile phase consisting of 2% formic acid/methanol (20:90, v/v) at a flow rate of 1.00 mL/min with a split of 200 microL to mass spectrometer. The retention time of rosuvastatin and internal standard was 2.3 and 3.4 min, respectively. Triple-quadrupole MS/MS detection was operated in positive mode by monitoring the transition of m/z 482-->258 for rosuvastatin and m/z 271-->253 for IS. Validation results indicated that the lower limit of quantification (LLOQ) was 0.1 ng mL(-1) and the assay exhibited a linear range of 0.1-20 ng mL(-1) and gave a correlation coefficient (r) of 0.9990 or better. Inaccuracy was less than 8.4% and imprecision less than 12.8% at all tested concentration levels. The analyte was stable in human plasma following three freeze/thaw cycles and for up to 8 weeks following storage at -20 degrees C. The assay was successfully applied to the analysis of rosuvastatin in human plasma samples derived from clinical pre-trials.     

LC-MS-MS法测定血浆中多西他赛和紫杉醇浓度及在乳腺癌患者中的应用

目的：建立一种快速、灵敏的液相色谱－串联质谱（LC-MS/MS）法检测乳腺癌患者血浆中多西他赛、紫杉醇的浓度。方法：多西他赛和紫杉醇互为内标,血浆样品100μL加入1 mL叔丁基甲醚萃取,分离有机相,以氮气吹干后流动相复溶进样。色谱柱为Agilent Eclipse XDB-C18（2.1 mm×100 mm,3.5μm）,流动相为0.4%甲酸水溶液-0.4%甲酸乙腈溶液（20∶80,v/v）,流速0.3 mL·min-1,柱温为40℃。采用多反应监测（MRM）进行定量,电喷雾电离源（ESI）正离子方式进行检测,多西他赛与紫杉醇用于定量分析的检测离子对分别为m/z 808.5→m/z 527.2和m/z 854.3→m/z 569.4。结果：多西他赛和紫杉醇的线性范围分别为5.0~1000 ng·mL-1和1.0～500 ng· mL-1,最低检测浓度分别为5.0 ng·mL-1和1.0 ng·mL-1。两药低、中、高三个浓度的批内和批间RSD均<15%,平均提取回收率分别为65.9%~84.3%和90.4%~106.5%。结论：本法快速、准确、灵敏、专属性强,适用于同步测定多西他赛和紫杉醇血药浓度及其在中国乳腺癌患者中的药动学研究。     

Quantification of flupirtine and its active metabolite D-13223 in human plasma by LC-MS/MS: application to a clinical trial of flupirtine maleate capsules in healthy male Chinese volunteers

In the present study, we developed a simple, sensitive, precise, and accurate liquid chromatography-tandem mass spectrometric (LC-MS/MS) method and validated such approach for simultaneous determination of flupirtine and its active metabolite D-13223 in human plasma. The flupirtine, D-13223, and stable isotope internal standard (IS) were extracted from plasma samples by liquid-liquid extraction and chromatographed on a C18 column with a mobile phase consisting of acetonitrile–water–ammonia (55:45:0.1, v/v/v) at a flow rate of 0.25 mL/min. Detection was performed on a triple quadrupole tandem mass spectrometer with an electrospray ionization source (ESI) by multiple reaction monitoring (MRM) in positive ion mode. The linear calibration curves were obtained within the concentration range of 10.00–2000.00 ng/mL for flupirtine and 2.00–400.00 ng/mL for D-13223. The intra- and inter-run RSD, calculated from quality control (QC) samples, was less than 9.26% for flupirtine and D-13223. The accuracy was –5.80%–3.31% for flupirtine and D-13223. The extraction recoveries of flupirtine, D-13223, and their IS were all between 88.3%–97.2%. The method was successfully applied to investigate the pharmacokinetic profiles of flupirtine and its active metabolite D-13223 in human plasma following peroral administration of 100 mg flupirtine maleate capsules in healthy male Chinese volunteers.     

高效液相－串联质谱联用法测定人血浆中阿昔洛韦的浓度

目的：建立高效液相-串联质谱联用（LC-MS／MS）法测定人血浆中阿昔洛韦的浓度。方法：采用Waters公司SYMMETRY^TM C18（3．9mm×150mm，5gm）谱柱；流动相为甲醇－水（15：85）；流速为0．6mL／min。串联质谱条件：采用多反应离子监测（MRM）检测，每个样品分析时间为2min。结果：阿昔洛韦在20．0～1000．0ng／mL浓度范围内有良好的线性关系；最低检测浓度为20．0ng／mL；日内、目间RSD均〈15％；准确度RE均在±15％范围内。结论：本法简单、快速、灵敏、准确，可用于人血浆中阿昔洛韦浓度的检测。     

高灵敏度LC-MS/MS法测定犬血浆中的坦洛新

犬口服盐酸坦洛新控释片后血浆药物浓度C_max小于10 ng·mL^-1，需建立测定犬血浆中坦洛新的高灵敏度液相色谱-串联质谱法(LC-MS/MS)。血浆样品加入内标苯海拉明，用正己烷-二氯甲烷(2∶1)萃取后，反相C₁₈色谱柱分离，以甲醇-乙腈-甲酸铵(30∶40∶30，v/v/v)为流动相，流速为0.4 mL·min^-1。选用大气压化学离子化源(APCI)三重四极杆串联质谱仪，以选择反应监测方式进行检测，用于定量分析的离子反应分别为m/z 409→228(坦洛新)和m/z 256→167(苯海拉明)。坦洛新线性范围为0.02～50 ng·mL^-1，定量下限为0.02 ng·mL^-1。批内、批间精密度(RSD)均小于9.72%，准确度(RE)在-2.61%～8.82%。本方法灵敏度高，专属性强，用于犬口服盐酸坦洛新控释片后的药代动力学研究。     

Validation of rapid and simple LC-MS/MS method for determination of voriconazole in rat plasma

A rapid, simple and sensitive LC-MS/MS analytical method was developed and validated for the determination of voriconazole (VRC) in rat plasma, using ketoconazole as internal standard (IS). Analysis was performed on a Shimadzu HPLC system using a Shimadzu C18 column and isocratic elution with acetonitrile-water-formic acid (60:40:0.05, v/v/v), at a flow of 1.0 mL/min (split ratio 1:5), and a mass spectrometer Micromass, equipped with a double quadrupole and an electrospray ionization interface, operated in a positive mode. Plasma samples were deproteinized with methanol (1:2) and 30 microL of the supernatant was injected into the system. The retention times of VRC and IS were approximately 3.3 and 2.7 min, respectively. Calibration curves in spiked plasma were linear over the concentration range of 50-2500 ng/mL with determination coefficient >0.98. The lower limit of quantification was 50 ng/mL. The accuracy of the method was within 5%. Intra- and inter-day relative standard deviations were less or equal to 12.5 and 7.7%, respectively. The applicability of the LC-MS-MS method for pharmacokinetic studies was tested using plasma samples obtained after intravenous administration of VRC to male Wistar rats. The reported method provided the necessary sensitivity, linearity, precision, accuracy, and specificity to allow the determination of VRC in pre-clinical pharmacokinetic studies.     

液相质谱串联法同时测定舒尼替尼及其活性代谢产物SU12662在BABL/c裸鼠血浆中的浓度及其药物动力学研究(英文)

本研究建立并验证了一种灵敏、快速、简单的液质联用方法,用于同时测定BABL/c裸鼠血浆中舒尼替尼及其活性代谢产物SU12662的药物浓度。血浆样品采用蛋白沉淀方法处理,并使用帕唑帕尼作为内标。采用C18反相柱进行分离,流动相为10 mM甲酸胺–乙腈(65:35,v/v,pH 3.25),流速0.5 m L/min。所有化合物均采用电喷雾电离源,正离子方式检测。舒尼替尼及SU12662的最低定量下限均为0.5 ng/m L,线性范围均为0.5–1000 ng/m L(r>0.99)。该方法对舒尼替尼及SU12662的测定均具有良好准确度以及可靠的日内、日间精密度,方法稳定性良好,无明显基质效应。此方法成功用于BABL/c裸鼠口服20 mg/kg舒尼替尼的药物代谢动力学研究。     

LC-MS/MS方法测定人血浆中多西环素浓度

目的建立迅速、简单、灵敏的液相色谱-串联质谱法测定人血浆中多西环素的浓度。方法血浆样品采用固相萃取的方法,以含0.04%TFA的混合溶液(甲醇-乙腈-水=45∶45∶10,v/v/v)为流动相;采用Dikma C18柱(30 mm×4.6 mm,5μm)分离,通过电喷雾电离源(ESI),以选择性反应监测(SRM)方式进行正离子检测,用于定量分析的离子反应分别为m/z 444.7→428.1(多西环素)和m/z 464.6→448.0(内标,去甲金霉素)。结果建立的人血浆内多西环素测定方法线性范围为50⁵ 000 ng·mL-1,定量下限可达50 ng·mL-1。日内、日间精密度(RSD)均<12%。结论该方法预处理简洁,灵敏,专属性强,可方便用于人血浆中多西环素的测定。     

Determination of omeprazole in human plasma by liquid chromatography-electrospray quadrupole linear ion trap mass spectrometry

An analytical method for the determination of omeprazole in human plasma has been developed based on liquid chromatography mass spectrometry. The analyte and internal standard sildenafil are extracted from plasma by liquid-liquid extraction using diethyl ether:dichloromethane (60:40, v/v) and separated by reversed phase high-performance liquid chromatography (HPLC) using acetonitrile:methanol:10 mM ammonium acetate (37.5:37.5:25, v/v/v) as mobile phase. Detection is carried out by multiple reaction monitoring on a Q TRAP LC/MS/MS system (Q TRAP). The method has a chromatographic run time of 3.5 min and is linear within the range 0.50-800 ng/mL. Intra- and inter-day precision expressed as relative standard deviation ranged from 0.4 to 8.5% and from 1.2 to 6.8%, respectively. Assay expressed as relative error was <5.7%. The method has been applied in a bioequivalence study of two capsule formulations of omeprazole.     

Oral and i.v. pharmacokinetics of isosteviol in rats as assessed by a new sensitive LC-MS/MS method

A sensitive liquid chromatographic-tandem mass spectrometric (LC-MS/MS) method was developed to investigate isosteviol pharmacokinetics in vivo. Isosteviol was extracted from plasma with hexane and 4% formic acid. A Phenomenex Synergi 2mu Fusion reversed phase analytical HPLC column (50 mm x 2.0 mm) equipped with a Synergi 2micro Fusion guard column was employed for chromatographic separations. The gradient mobile phase consisted of acetonitrile (ACN) and 20mM ammonium acetate at pH 6.5, starting at 20% ACN and ramping to 80% at 7 min, followed by 80% ACN for 1 min, then 20% ACN for 5 min. Negative SRM was used to monitor the m/z 317.1/317.1 and 317.3/317.3 transitions for isosteviol and 395.0/395.0 and 397.0/397.0 transitions for internal standard. The retention time of isosteviol was 9.2 min. The assay was linear over the range of 50-2,000 ng/mL. The accuracy of the method was in the range of 97-105%. Intra- and inter-day precisions were in the range of 1.5-4.6%. Isosteviol (4 mg/kg) was dosed intravenously and orally to Sprague-Dawley rats (n=6). Plasma samples were collected and analysed. Intravenous isosteviol has a distribution half-life of 35.7+/-9.0 min with the initial distribution volume of 68.1+/-9.4 mL. The total clearance, terminal half-life and steady-state volume of distribution were 1.25+/-0.12 mL/min, 150.6+/-50.5 min and 272.6+/-95.9 mL, respectively. The oral bioavailability of isosteviol was found to be 60.4+/-15.5%.     

色谱法测定人血浆中万古霉素的浓度

目的：建立HPLC法和液相色谱-串联质谱（LC-MS/MS）法检测人血浆中万古霉素的浓度,并分别与FPIA法进行比较。方法：HPLC法：100μL血浆样品加入等体积10%的高氯酸沉淀,振荡离心后取上清液进样。采用Agilent Eclipse XDB-C18（250 mm×4.6 mm,5μm）,柱温为35℃,流动相为0.05 mol·L-1 KH2PO4（pH=3.2）-甲醇（74∶26,v/v）,流速为1 mL·min-1,检测波长为230 nm。 LC-MS/MS法：100μL血浆样品用300μL乙腈沉淀,振荡离心后取上清液进样。色谱柱为Agilent Eclipse XDB-C18（100 mm ×2.1 mm,3.5μm）,柱温为40℃,流动相为水（含0.1%甲酸）-乙腈（90∶10,v/v）,流速为0.20 mL·min-1。采用电喷雾化离子源（ESI）,多离子反应模式（MRM）检测,万古霉素和内标去甲万古霉素的监测离子对分别为m/z 725.0→144.0和718.5→144.0。采用建立的HPLC法和LC-MS/MS法测定95份临床样本,并与FPIA法进行相关性和测定方法的偏倚分析。结果：HPLC法和LC-MS/MS法测定万古霉素的线性范围分别为1.2~96μg·mL-1和0.4~96μg·mL-1,低、中、高三种浓度质控品日内和日间相对标准差（RSD）均〈15%。两种方法与FPIA法有很强的相关性（r=0.9621,P〈0.0001和r=0.9466,P〈0.0001）,无明显偏倚。结论：建立的HPLC和LC-MS/MS法快速、灵敏、准确,样本测定结果与FPIA法无显著差异,适用于万古霉素的常规血药浓度监测及人体药物代谢动力学研究。     

液相色谱-串联质谱法测定人血浆中多潘立酮浓度

目的建立高效液相色谱-串联质谱测定人血浆中多潘立酮(第2代胃动力药)浓度的方法。方法用TC-C18色谱柱,流动相为甲醇(含0.025%甲酸)-1 mmol.L-1甲酸铵溶液(含0.05%甲酸),用梯度洗脱进行分离,流速为1.0 mL.min-1。用正离子化模式,多重反应监测(MRM)扫描方式进行检测定量。结果多潘立酮的线性范围为0.1～50.0 ng.mL-1,日内、日间精密度均小于15%,提取回收率大于80%。结论本方法灵敏、准确、快速,可用于人血浆中多潘立酮浓度的测定和药代动力学研究。     

LC-MS／MS测定人血浆中甘草次酸的浓度及其在药代动力学中的应用(英文)

建立一种灵敏度高、重现性好的高效液相色谱-质谱法（LC-MS/MS）测定人血浆中甘草次酸的浓度,并用于甘草酸铵的人体药动学研究。采用液-液萃取法进行血浆样品预处理,色谱柱为C₁₈柱,流动相为乙腈-5mmol/L乙酸铵（70:30,v/v）,流速0.8mL/min。采用负离子模式,多离子监测（MRM）方式进行检测,甘草次酸与内标甲砜霉素离子对质核比（m/z）分别为469.3→355.3、354.1→185.0。方法学验证表明此方法特异性强、灵敏度高、准确度与精密度符合要求,线性范围为0.5-500ng/mL,血浆样本经两次冻融及冷冻稳定良好,可以用于甘草酸铵的人体药代动力学研究。健康志愿者口服75mg甘草酸铵后,活性代谢产物甘草次酸的药动学参数如下:AUC_0-t（3457.26±1999.01）ng·h/mL、AUC_0-∞（3708.85±2428.36）ng·h/mL、MRT_0-t（19.69±4.03）h、MRT_0-∞（22.83±8.45）h、t_1/2Z（11.71±7.77）h、T_max（13.40±4.84）h、CLz/F（29±17±19±82）L/h、Vz/F（487.38±518.07）L、C_max（215.85±99.88）ng/mL。