LC-MS/MS法同时测定人血浆伊曲康唑和羟基伊曲康唑浓度

目的:建立同时测定人血浆伊曲康唑和羟基伊曲康唑浓度的液相色谱-串联质谱法(LC-MS/MS)。方法:100μL血浆样品经液-液萃取后,以乙腈-水-冰醋酸(60:40:1.5)为流动相,经Neucleosil ODS柱(50 mm×2.0 mm,5μm)分离,采用电喷雾电离源,以多反应监测(MRM)方式进行正离子检测。用于定量分析的离子分别为m/z 705→m/z 392(伊曲康唑),m/z 721→m/z 408(羟基伊曲康唑)和m/z 383→m/z 337(内标氯雷他定)。结果:测定血浆伊曲康唑和羟基伊曲康唑的线性范围分别为:10～2 500 ng.mL-1和20～4 000ng.mL-1,最低定量限(LLOQ)分别为:10和20 ng.mL-1。日内、日间精密度(RSD)均<15.0%,准确度(RE)在±7.8%以内。结论:该方法分析时间短、灵敏度高、专属性强,适用于伊曲康唑和羟基伊曲康唑的药动学研究。     

盐酸特拉唑嗪片人体药动学及生物等效性研究

目的:建立人血浆中特拉唑嗪药物浓度的 HPLC-UV 测定法,研究健康受试者口服盐酸特拉唑嗪受试制剂和参比制剂的生物等效性,并估算其药代动力学参数。方法:18名健康男性志愿受试者单剂量随机交叉口服2 mg 盐酸特拉唑嗪受试制剂或参比制剂,采用高效液相色谱法测定给药后不同时间血浆中特拉唑嗪的浓度,估算药动学参数,并作方差分析和双单侧 t检验。结果:受试者口服盐酸特拉唑嗪受试制剂和参比制剂后的 T_(max)分别为(1.08±0.19)h和(1.08±0.19)h,C_(max)分别为(320.49±44.82)ng·mL~(-1)和(316.03±45.40)ng·mL~(-1),t_(1/2)分别为(12.68±0.92)h和(12.97±1.33)h,AUC_(0→48)分别为(2648.00±316.85)ng·h·mL~(-1)和(2618.67±334.38)ng·h·mL~(-1),AUC_(0→∞)分别为(3002.46±322.25)ng·h·mL~(-1)和(2979.85±341.96)ng·h·mL~(-1)。结论:本方法操作简便,专属性强。盐酸特拉唑嗪受试制剂和参比制剂具有生物等效性。     

2种洛伐他汀片人体药动学及生物等效性研究

目的:比较2种洛伐他汀片在健康人体内的药代动力学和生物利用度,评价2种制剂的生物等效性。方法:18名男性健康志愿者随机交叉分别单剂量口服山东罗欣药业股份有限公司研制的洛伐他汀片5片(20 mg·片~(-1))或北京万生药业有限责任公司生产的洛伐他汀片5片(20 mg·片~(-1)),采用 HPLC 测定血浆中药物浓度,通过方差分析和双向单侧 t 检验比较2种制剂的 AUC_(0→24)、C_(max)、T_(max)。结果:2种制剂的 T_(max)(h)分别为2.11±0.21和2.11±0.21,C_(max)(ng·mL~(-1))为93.73±17.42和92.67±13.98,t_(1/2)(h)分别为6.75±1.33和6.50±1.09,AUC_(0→24)(ng·mL~(-1)·h~(-1))分别为480.56±55.75和478.24±69.26,AUC_(0→∞)(ng·mL~(-1)·h~(-1))分别为555.33±69.98和543.04±76.25。结论:2种洛伐他汀片生物等效,受试制剂与参比制剂的相对生物利用度为(102.67±6.98)%。     

伊曲康唑分散片人体药动学及生物等效性研究

目的:研究伊曲康唑分散片和伊曲康唑胶囊在正常人体的药动学与生物等效性.方法:18名健康男性志愿受试者随机交叉口服0.2g单剂量伊曲康唑分散片受试制荆和伊曲康唑胶囊参比制剂后,采用高效液相色谱法测定伊曲康唑的血浆药物浓度,采用方差分析及t检验判定其生物等效性.结果:两种制剂均符合一级吸收开放性一室模型,伊曲康唑分散片和伊曲康唑胶囊主要药代动力学参数AUC0→72分别为(2 221.9±762.9)和(2 311.9±844.4)ng/(h·mL),AUC0→∞分别为(2 374.2±790.8)和(2 473.3±878.9)ng/(h·mL),Cmax分别为(179.8±56.8)和(174.1±64.1)ng/mL,Tmax分别为(3.6±1.0)和(4.1±1.3)h,t1/2分别为(16.5±4.2)和(17.5±3.1)h.伊曲康唑分散片的相对生物利用度为(97.8±14.0)%.结论:伊曲康唑分散片和伊曲康唑胶囊为生物等效制剂.     

HPLC—MS法测定人血浆中他林洛尔的浓度及其在中国健康志愿者体内的药动学研究

目的:建立一种快速、特异灵敏的测定人血浆中他林洛尔浓度的高效液相色谱-质谱法(HPLC-MS),为研究他林洛尔在中国健康志愿者体内的药物动力学研究提供手段。方法:以普萘洛尔作为内标(I.S.),血浆样品碱化后用叔丁基甲醚萃取,用 Phenomenex C_(18)反相色谱柱(4.6 mm×250 mm,5 μm,USA)进行分离,以乙腈-缓冲液(10 mmol·L~(-1)醋酸铵和0.1%甲酸)(40:60,v/v)为流动相,柱温40℃,流速0.85 mL·min~(-1),HPLC—MS/ESI~ 法选择性监测准分子离子峰(他林洛尔:m/z=364.3,I.S.:m/z=260.3)。结果:他林洛尔及内标普萘洛尔在5.5 min 内完全分离;他林洛尔在1.0～400.0 ng·mL~(-1)时线性关系良好,相关系数为0.9996;萃取回收率大于82%;方法回收率大于98%;最低检测浓度为0.3 ng·mL~(-1);日内日间 RSD均小于8%。主要药动学参数如下:C_(max)(147.8±63.8)ng·mL~(-1);t_(max)(2.0±0.7)h;t_(1/2)(12.0±2.6)h。结论:本方法简便快速,灵敏准确,适用于他林洛尔药物动力学的研究。     

犬血浆中决奈达隆及其代谢物SR35021的LC-MS/MS法测定

建立了LC-MS/MS法同时测定Beagle犬血浆中的决奈达隆及其N-去丁基代谢物SR35021,并考察了盐酸决奈达隆片在Beagle犬内的药动学。采用C_(18)色谱柱,以乙腈-甲醇-5 mmol/L乙酸铵溶液-甲酸(55:10:35:0.07)为流动相,大气压化学电离源,多反应监测(MRM)方式,正离子检测。用于定量分析的离子反应分别为m/z 557→100(决奈达隆)、m/z 501→114(代谢物SR35021)和m/z 449→252(内标,托伐普坦)。血浆中决奈达隆及其代谢物SR35021均在0.2～200 ng/ml浓度范围内线性关系良好。两者的日内和日间RSD均小于10%。主要药动学参数如下:c_(max)(495±208)和(61.6±15.9)ng/ml;t_(max)(1 67±0.61)和(1.75±0.42)h;t_(1/2)(5 92±0.59)和(3.01±0.60)h:AUC_(0-t)(2 785±1 409)和(325±137)ng·h·ml;AUC_(0-(?))(2 793±1 412)和(328±136)ng·h·m1。     

伊曲康唑脂质体在大鼠体内药动学研究

目的：研究伊曲康唑脂质体在大鼠体内的药动学。方法：大鼠尾静脉注射伊曲康唑脂质体及伊曲康唑注射液,建立液相-质谱联用分析（LC—MS／MS）方法测定血浆中的伊曲康唑药物浓度。结果：伊曲康唑血浓度在10～1600ng·ml^-1范围内线性良好（r=0．9989）,伊曲康唑脂质体及市售伊曲康唑注射液大鼠体内MRT分别为（3．68±0．19）h和（1．70±0．06）h,AUC分别为（155．47±13．84）mg·L^-1·h和（87．12±5．55）mg·L^-1·h,差异具有统计学意义（P〈0．01）。结论：伊曲康唑脂质体具有一定的缓释作用。     

LC-MS／MS测定人血浆中卡托普利的浓度及其药动学研究

目的:建立色谱-串联质谱法测定血浆中卡托普利的浓度,并利用该方法研究了2种国产卡托普利制剂在健康受试者中的药代动力学。方法:用对溴苯乙酰基溴(p-BPB)作为稳定剂及衍生化试剂,以利培酮为内标物,采用 LC-MS/MS 方法测定。以乙腈-0.025%甲酸(60:40)为流动相,色谱柱为 Alltima C_(18)(100 mm×2.1 mm,3.0μm),流速为0.2 mL·min~(-1)。采用大气压化学离子源(APCI),正离子扫描(ESI~ );用于定量分析的离子反应分别为 m/z 414.1→210.6(卡托普利衍生物)和 m/z 411.3→191.1(内标物利培酮)。结果:卡托普利线性范围为1.0～748.0 ng·mL~(-1),定量限为1.0 ng·mL~(-1),日内、日间精密度(RSD)均小于5.8%,平均提取回收率为(103.5±5.8)%。应用此方法研究了18名健康受试者单剂量口服2种卡托普利片50 mg 后的药代动力学特点,2种制剂的 T_(max)(h)分别为0.72±0.19和0.68±0.14,C_(max)(ng·mL~(-1))分别为343.4±132.3和333.6±94.6,T_(1/2)(h)分别为2.07±0.65和2.07±0.69,AUC_(0-t)(ng·h·mL~(-1))分别为442.5±95.6和424.9±78.3。结论:首次报道了用 LC-MS/MS 测定卡托普利衍生物(cap-p-BPB)的浓度。本方法专属、灵敏度高,血浆处理简便,可用于卡托普利制剂的药代动力学及相对生物利用度的研究。     

酒石酸美托洛尔片在健康人体中的生物等效性研究

目的:研究国产与进口酒石酸美托洛尔片的生物等效性。方法:采用双交叉随机自身对照试验设计,20名健康男性志愿者分别单剂口服2种酒石酸美托洛尔片(参比制剂和受试制剂)100 mg,应用高效液相-荧光检测法测定血浆中美托洛尔的浓度,经DAS 2.1软件处理后得药动学数据,并进行等效性检验。结果:参比制剂与受试制剂的主要药动学参数分别为C_(max)(457.2±112.6)和(480.9±107.6)ng·mL~(-1),T_(max)(1.43±0.34)和(1.25±0.44)h,t_(1/2)(3.20±0.97)和(3.48±1.36)h,AUC_(0-24h)(2 241±864)和(2 169±873)ng·h·mL~(-1),AUC_(0-∞)(2199±889)和(2264±870)ng·h·mL~(-1),受试制剂对参比制剂的平均相对生物利用度为(104.6±16.9)%。将主要药动学参数经方差分析和双单侧t检验,T_(max)采用非参数检验,结果显示,差异无统计学意义。结论:2种酒石酸美托洛尔片具有生物等效性。     

赖诺普利片人体药动学及生物等效性研究

目的:评价国产和进口赖诺普利片的生物等效性。方法:18名男性健康志愿者随机交叉单剂量口服20mg 国产和进口赖诺普利片,采用 HPLC 测定血浆中药物浓度,通过方差分析和双向单侧 t 检验比较2种片剂药-时曲线下面积(AUC_(0-60))。结果:2种制剂的 t_(max) 分别为(6.00±0.00)h 和(6.11±0.47)h,C_(max)为(110.37±23.35)ng·mL~(-1)和(109.18±26.06)ng·mL~(-1),2种制剂 t_(1/2)分别为(16.20±2.10)h 和(16.50±2.28)h,药时曲线下面积(AUC_(0→60)分别为(1531.73±239.08)μg·mL~(-1)·h 和(1535.39±170.93)μg·mL~(-1)·h。结论:2种赖诺普利片生物等效,相对生物利用度为(99.8±10.7)%。     

API-ionspray MS and MS/MS study on the structural characterization of bisbenzylisoquinoline alkaloids

API-ionspray MS and MS/MS techniques have been utilized to elucidate the structures of 20 bisbenzylisoquinoline alkaloids, consisting of 17 diether and three monoether links of two benzyltetrahydroisoquinoline units, which were isolated and identified previously from a variety of Thalictrum sp. (Ranunculaceae family). Apparent protonated molecular ions ([M+H](+)) and very intense doubly-protonated molecular ion ([M+2H](++), 100% of relative abundance) in Q1 Scan MS spectra and prominent as well as diagnostic product ions for the structural information in MS/MS spectra were observed in nanogram quantities for all investigated alkaloids.     

LC/MS/MS的多反应监测方法定量测定灯盏乙素

目的：建立一种可靠的灯盏乙素定量分析方法。方法：用三级四极串联质谱(MS/MS)作为HPLC的检测器,其中MS/MS使用了多反应监测(MRM)扫描方式。选择母→子离子对m/z -461→m/z -285作为MRM监测的离子对;HPLC流动相为100％甲醇,流速0.9 mL.min^-1,色谱柱Beckman ODS-1。以测定短葶飞蓬提取物的灯盏乙素含量为例,对此方法进行了应用。结果：灯盏乙素在短葶飞蓬提取物中含量为6.98%。方法线性范围20～160 ng.mL^-1 (γ=0.999);加入灯盏乙素标准品20,60和160 ng的加样回收率分别为：96.5%,97.4%和97.3%。检测限为1 ng,每个样品的分析时间为4 min。结论：此法灵敏、快速、准确,可应用于灯盏乙素的各种药剂、药代的研究。     

System suitability in bioanalytical LC/MS/MS

System suitability is widely recognized as a critical component of bioanalysis. This paper discusses a generic system suitability test that monitors instrument performance throughout a run when used for liquid chromatography tandem mass spectrometry (LC/MS/MS) in bioanalysis. This system suitability process is designed to ensure that the LC/MS/MS system is performing in a manner that leads to the production of accurate and reproducible data that can be submitted with confidence to regulatory agencies. This process contains tests for signal stability, carryover, and instrument response. This approach is integrated throughout an analytical run and has been used in the analysis of over 25,000 batches of clinical samples. Two case studies are presented in which quality control samples and standards meet all acceptance criteria (based on Standard Operating Procedures and the Food and Drug Administration's recommendations for bioanalytical method validation) but failed the proposed system suitability test, and thus were rejected. In these case studies, the concentrations of a significant number of clinical samples (over 35%) were affected, resulting in changes of more than 15% when the samples were reanalyzed. These data indicate that the poor performance of an LC/MS/MS system could adversely affect the calculated concentrations of unknown samples even though the results for quality control samples appear to be acceptable.     

LC/MS/MS与GC/MS法分析鉴定小鼠尿中沙美特罗的代谢产物

目的:鉴定沙美特罗在小鼠尿中的主要代谢产物.方法:ig给药后,收集小鼠尿液,经固相提取,葡萄糖醛酸酶水解,进行LC/MS/MS分析和硅烷化后进行GC/MS分析同时分离鉴定沙美特罗代谢产物.结果和结论:在给药后尿样中发现沙美特罗原型和4种代谢产物M1～M4,其结构推测为19-羟基沙美特罗(M1)、2-羰基沙美特罗(M2)、19-羰基沙美特罗(M3)和19-羟基-8-甲氧基沙美特罗(M4).     

Analysis of 'SHENMAI' injection by HPLC/MS/MS

An HPLC/MS/MS method was developed for the analysis of 'SHENMAI' injection, composed of red ginseng and ophiopogon. The constituents of 'SHENMAI' were found to be similar with those of ginseng and 39 ginsenosides were detected. By the studies of MS and MS/MS spectra and the comparison with literature data, most of these ginsenosides were identified. Based on this study, suggestions were put forward to improve the quality control system of 'SHENMAI' injection.     

Determination of a selection of synthetic cannabinoids and metabolites in urine by UHPSFC‐MS/MS and by UHPLC‐MS/MS

Two different analytical techniques, ultra‐high performance supercritical fluid chromatography‐tandem mass spectrometry (UHPSFC‐MS/MS) and reversed phase ultra‐high performance liquid chromatography‐tandem mass spectrometry (UHPLC‐MS/MS), were used for the determination of two synthetic cannabinoids and eleven metabolites in urine; AM‐2201 N‐4‐OH‐pentyl, AM‐2233, JWH‐018 N‐5‐OH‐pentyl, JWH‐018 N‐pentanoic acid, JWH‐073 N‐4‐OH‐butyl, JWH‐073 N‐butanoic acid, JWH‐122 N‐5‐OH‐pentyl, MAM‐2201, MAM‐2201 N‐4‐OH‐pentyl, RCS‐4 N‐5‐OH‐pentyl, UR‐144 degradant N‐pentanoic acid, UR‐144 N‐4‐OH‐pentyl, and UR‐144 N‐pentanoic acid. Sample preparation included a liquid‐liquid extraction after deconjugation with ß‐glucuronidase. The UHPSFC‐MS/MS method used an Acquity UPC^{2 TM} BEH column with a mobile phase consisting of CO₂ and 0.3% ammonia in methanol, while the UHPLC‐MS/MS method used an Acquity UPLC® BEH C₁₈ column with a mobile phase consisting of 5 mM ammonium formate (pH 10.2) and methanol. MS/MS detection was performed with positive electrospray ionization and two multiple reaction monitoring transitions. Deuterated internal standards were used for six of the compounds. Limits of quantification (LOQs) were between 0.04 and 0.4 µg/L. Between‐day relative standard deviations at concentrations ≥ LOQ were ≤20%, with biases within ±19%. Recoveries ranged from 40 to 90%. Corrected matrix effects were within 100 ± 10%, except for MAM‐2201 with UHPSFC‐MS/MS, and for UR‐144 N‐pentanoic acid and MAM‐2201 N‐4‐OH‐pentyl with UHPLC‐MS/MS. Elution order obtained by UHPSFC‐MS/MS was almost opposite to that obtained by UHPLC‐MS/MS, making this instrument setup an interesting combination for screening and confirmation analyses in forensic cases. The UHPLC‐MS/MS method has, since August 2014, been successfully used for confirmation of synthetic cannabinoids in urine samples revealing a positive immunoassay screening result. Copyright © 2015 John Wiley & Sons, Ltd.     

超高压液相/电喷雾-LTQ-Orbitrap质谱联用技术分析三七根中皂苷类成分

建立三七药材的UPLC-ESI-HRMS定性分析方法。采用Kinetics色谱柱,梯度洗脱,经DAD检测器后采用ESI-LTQ-Orbitrap质谱负离子模式采集,三七成分的一级全扫描离子在离子阱内进行CID多级质谱,FT检测高分辨质谱数据进行分析。结果表明三七皂苷成分分离良好,根据多级质谱碎片信息和精确相对分子质量信息,结合文献,从三七中鉴定分析了43个成分,并首次从三七中检测到新型的三七皂苷母核和乙酰取代皂苷成分。本方法分离度良好、灵敏度高,可用于三七药材的定性分析,并有助于对三七进行进一步的活性成分研究和质量控制。     

LC／MS／MS技术对西他沙星代谢物结构的研究

利用LC／MS／MS实现对西他沙星体内代谢物的在线鉴定,并通过定向合成的代谢物对照品,对西他沙星代谢物的结构作了进一步验证。结果鉴定出六个代谢物D2～D7。根据代谢物的结构特征证明了西他沙星在肝脏经氧化被代谢消除。     

液相色谱-电喷雾串联质谱法测定人血浆中辛伐他汀浓度

目的:建立液相色谱-电喷雾串联质谱联用测定人血浆中辛伐他汀浓度的方法。方法:色谱条件为 Discovery ODS C_(18)(2.1 mm×100 mm,3μm)色谱柱;流动相为乙腈-0.1%甲酸溶液(65:35,v/v);柱温30℃;流速0.2 mL·min~(-1);进样量5μL。质谱条件为电喷雾电离源(ESI),选择性检测定量离子为 m/z 441.3/325.0(辛伐他汀)和 m/z 427.2/325.0(洛伐他汀,内标)带正电荷的离子峰。样品用乙酸乙酯提取。结果:血浆中辛伐他汀浓度在0.20～20.0 ng·mL~(-1)内呈良好线性关系,r=0.9996。提取回收率为90.0%～92.4%(RSD 6.0%～14.9%),方法回收率在85%～115%之内,日内和日间精密度试验的RSD 均<15%,最低检测浓度为0.2 ng·mL~(-1)。结论:该测定方法经全面考察符合血浆样品的测定要求,可以应用于辛伐他汀的人体药动学研究和生物等效性评价。