高效液相色谱-串联质谱法测定血浆中黄豆苷元的浓度

目的:建立高效液相色谱-串联质谱联用(LC-MS-MS)的方法测定人血浆内黄豆苷元的浓度,并应用于药动学研究和生物等效性评价。方法:以木犀草素为内标,甲醇(含0．2%乙酸)为蛋白沉淀剂,采用Merck LiChroCART C_(18)色谱柱分离,通过LC-MS-MS电喷雾离子源(ESI),以选择反应监测(SRM)方式进行检测,离子极性监测为负离子,用于定量分析的离子分别为黄豆苷元m／z 252．9,木犀草素m／z 284．8。结果:血浆中的杂质不干扰黄豆苷元和木犀草素的测定,线性范围为0．1004～80．32μg·L~(-1)(r=0．994 0),血浆中黄豆苷元的绝对回收率大于80%,浓度为0．4016,4．016和40．16μg·L~(-1)的QC样品的批内和批间精密度RSD均小于10%。结论:该方法简便准确、灵敏度高,可以用于黄豆苷元的人体药动学研究和生物等效性评价。     

液相色谱-串联质谱法测定人血浆中罗格列酮

目的:建立测定人血浆中罗格列酮的液相色谱-质谱-质谱联用法,并用于临床药动学研究。方法: 血浆样品经液-液萃取后,以乙腈-水-甲酸(90:10:0．5)为流动相,采用Zorbax SB—C18柱分离,通过电喷雾离子化四极杆串联质谱,以选择反应监测(SRM)方式进行检测。用于定量分析的离子反应分别为m／z 358→ 135(罗格列酮)和m／z 256→167(内标苯海拉明)。结果:标准曲线线性范围为0．50～1 000μg·L-1,定量下限为0．50μg·L-1,日内、日间精密度(RSD)均小于7．4％。应用此法测试了20名男性健康受试者口服酒石酸罗格列酮片(相当于罗格列酮4 mg)后血浆中罗格列酮的浓度。结论:该法灵敏、快速、准确,操作简便、线性范围宽,适用于罗格列酮的临床药动学研究。     

高效液相色谱-质谱联用法测定人血浆中洛伐他汀的浓度

目的:建立高效液相色谱质谱联用法测定人血浆中洛伐他汀的浓度。方法:色谱条件———色谱柱为DiamonsilC18(150mm×2.1mm,5μm),流动相为乙腈∶水=60∶40,流速为0.4mL·min-1,柱温40℃;质谱条件———电喷雾离子化法(ESI)采集正离子,单离子方式检测洛伐他汀m/z405和内标辛伐他汀m/z419。血浆样品预处理采用环己烷二氯甲烷(3∶1)萃取法。结果:方法的线性范围为0.5～50μg·L-1,r=0.9989,检测限为0.1μg·L-1,标准血浆样品0.5,4,20μg·L-1的日内和日间精密度为RSD<14.47%,方法回收率为88.12%～112.09%,提取回收率为76.28%～77.15%。结论:该法灵敏、专属,适用于洛伐他汀人体药动学的研究。     

测定人血浆中齐多夫定的液相色谱-串联质谱法及生物等效性的应用

目的:建立快速、灵敏的液相色谱-串联质谱法(LC／MS／MS)测定人血浆中齐多夫定,并用于制剂生物等效性研究。方法:血浆样品经液-液萃取后,以甲醇-水(70:30,用1％氨水调节pH至6．0)为流动相, Zorbax Extend C18柱分离,采用电喷雾离子源四极杆串联质谱,以选择反应监测(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 268→m/z 127(齐多夫定)和m／z 225→m／z 127(内标,司他夫定)。结果:齐多夫定测定方法的线性范围为1．0-2 500μg·L-1;日内、日间精密度(RSD)均小于8．0％,准确度 (RE)在±2．0％以内。应用此法研究比较了18名健康受试者单剂量口服齐多夫定参比制剂和受试制剂 200 mg后的主要药动学参数。以AUC0-8计算受试制剂相对生物利用度。结论:该法选择性强、灵敏度高,适用于齐多夫定制剂的生物等效性评价及临床药动学研究。     

液相色谱-串联质谱法测定人血浆中匹伐他汀

目的:建立灵敏、快速的液相色谱-串联质谱(LC-MS-MS)法测定人血浆中匹伐他汀,并用于药动学研究。方法:血浆样品经乙腈沉淀蛋白后,以乙腈-5 mmol·L~(-1)醋酸铵溶液(90:10,V:V)为流动相,Zorbax XDB C_8柱分离。采用电喷雾电离源(ESI),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 422→m/z 290(匹伐他汀)和m/z 515→m/z 276(内标,替米沙坦)。结果:测定血浆中匹伐他汀的线性范围为0.1～100μg·L~(-1),定量下限为0.1μg·L~(-1)。日内、日间精密度(RSD)均小于12.0%,准确度(RE)在±2.4%以内。结论:该方法选择性好、灵敏度高、操作简便,适用于匹伐他汀的临床药动学研究。     

Metabolism of zearalenone in the course of beer fermentation

Zearalenone (ZON) is a mycotoxin with estrogenic activity, produced by members of Fusarium species, and is found worldwide in a number of cereal crops. It is known to have four active metabolites (α-zearalenol (α-ZOL), β-zearalenol (β-ZOL), α-zearalanol (α-ZAL), and β-zearalanol (β-ZAL)). A highly sensitive analytical method using liquid chromatography/tandem mass spectrometry using electrospray ionization (LC-ESI-MS/MS) has been established and validated in order to analyze ZON and its metabolites in beer and malt samples. The metabolism of ZON in the course of beer fermentation was further characterized using the artificially contaminated wort by this established method. In the fermented sample, 85.9% of ZON was converted to β-ZOL, which has lower estrogenic activity than that of ZON. These findings indicate that the health risk to humans due to ZON in beer is reduced during the fermentation process.     

Rapid quantification of quinine and its major metabolite (3S)-3-hydroxyquinine in diluted urine by UPLC-MS/MS

A rapid UPLC-MS/MS quantitative assay for the quantification of quinine and (3S)-3-hydroxyquinine requiring minimal sample pre-treatment - dilute-and-shoot type approach - has been developed. The assay was run at 0.6mL/min using gradient elution with (pH 10; 10mM) ammonium bicarbonate and methanol with a total cycle time of 2.5min on a 50mm×2.1mm ID, 1.7μm Acquity BEH column. Peak shapes were highly symmetrical allowing for accurate peak integration. Calibration curves for both analytes were constructed from 1.00 to 20.00ng/mL, yielding R(2) values >0.995. Intra- and inter-batch assay precision and accuracy were evaluated using 6 injections of QC solutions on 3 separate days (n=18) and were found to be within ±10% and 90-110% respectively. The method was shown to be suitable for quantitatively determining the ratio of quinine to (3S)-3-hydroxyquinine for a cohort of samples from an epidemiological study.     

盐酸关附甲素代谢产物关附壬素的药动学研究

目的建立测定盐酸关附壬素血药浓度的液相色谱-质谱联用分析方法(LCMS),并探讨其在大鼠体内的药动学。方法大鼠iv盐酸关附壬素20mg·kg-1后不同时间点采血,利用LCMS法测定血药浓度,并用3P87软件求算其药代动力学参数。结果盐酸关附壬素浓度在005~20mg·L-1范围内线性关系良好(r=09994)。绝对回收率大于80%,日内、日间RSD均小于15%。大鼠iv关附壬素20mg·kg-1后其主要动力学参数AUC、Vc、T1/2、CLs分别为1570mg·h-1·L-1、131L·kg-1、249h、146L·kg-1·h-1。排泄试验结果表明,给药24h后从尿中,胆汁中和粪便中排出的原形药物累计量相当于给药量的706%、91%、53%。结论该法具有专属性强,灵敏度高,可用于关附壬素的体内定量分析。     

高效液相色谱-串联质谱法测定血浆中熊去氧胆酸的浓度

目的：建立高效液相色谱-质谱联用的方法测定人血浆内的熊去氧胆酸浓度的方法。方法：采用Shimadzu VP-ODS(4．6 mm×150 mm,5μm)色谱柱；柱温25℃；流动相为(A)乙腈-水(含5 mmol·L~(-1)的乙酸铵)(35：65,V/V),(B)乙情；梯度程序为0～2min,A：B=94：6；2～4．5min,A：B= 80：20：4．5～7min,A：B=94：6；流速为1．0 mL·min~(-1)；通过液相串联质谱,电喷雾离子源(ESI),以选择反应监测(SRM)方式进行检测；离子极性监测负离子(-)；检测离子为熊去氧胆酸m/z 391．1 [M-H]~-→391．1[M-H]~-,盐酸西替利嗪(内标)m/z 387．1[M-H]~-→387．1[M-H]~-。结果：熊去氧胆酸的最低定量限为40．144μg·L~(-1),线性范围为40．14～12 043μg·L~(-1)(r=0．995)。结论：该方法简便、灵敏度高,可以用来进行熊去氧胆酸的人体药动学和生物等效性研究。     

液相色谱-串联质谱法测定人血浆中米格列奈浓度及其药动学研究

目的建立一种快速分析测定人血浆中米格列奈的液相色谱-串联质谱色谱法,用以研究米格列奈在健康人体内的药动学。方法以那格列胺为内标,血浆酸化后经液液萃取后,采用液相色谱-串联质谱法以多反应检测方式进行测定,选择监测的离子为m/z 316.2→298.2(米格列奈)和m/z 318.2→120.2 (那格列胺)。流动相以甲醇-10 mmol·L~(-1)醋酸铵水溶液(75:25,V/V),流速0.3 mL·min~(-1),色谱柱为Agilent Zorbax Eclipse Plus C_(18)(1.8μm,3 mm×150 mm);柱温:30℃。结果米格列奈在0.502 0～4 016μg·L~(-1)浓度范围内呈良好的线性关系(r=0.995),最低检测浓度为0.502 0μg·L~(-1),精密度和准确度试验均符合生物分析要求,应用此法测得5、10、20 mg剂量组不同给药方式、多个时间点的米格列奈血药浓度,结果呈线性动力学特征。结论该方法灵敏度高、专属性强、准确、简便,适用于米格列奈的人体药动学研究。     

MALDI MSI and LC‐MS/MS: Towards preclinical determination of the neurotoxic potential of fluoroquinolones

Fluoroquinolones are broad‐spectrum antibiotics with efficacy against a wide range of pathogenic microbes associated with respiratory and meningeal infections. The potential toxicity of this class of chemical agents is a source of major concern and is becoming a global issue. The aim of this study was to develop a method for the brain distribution and the pharmacokinetic profile of gatifloxacin in healthy Sprague‐Dawley rats, via Multicenter matrix‐assisted laser desorption/ionization mass spectrometry imaging (MALDI MSI) and quantitative liquid chromatography‐tandem mass spectrometry (LC‐MS/MS). We developed a sensitive LC‐MS/MS method to quantify gatifloxacin in plasma, lung, and brain homogenates. A pharmacokinetic profile was observed where there is a double peak pattern; a sharp initial increase in the concentration soon after dosing followed by a steady decline until another increase in concentration after a longer period post dosing in all three biological samples was observed. The imaging results showed the drug gradually entering the brain via the blood brain barrier and into the cortical regions from 15 to 240 min post dose. As time elapses, the drug leaves the brain following the same path as it followed on its entry and finally concentrates at the cortex. Copyright © 2015 John Wiley & Sons, Ltd.     

液质联用法测定犬血浆中阿普唑仑及其代谢物α-羟基阿普唑仑的浓度

目的建立测定Beagle犬血浆中阿普唑仑及其代谢物α-羟基阿普唑仑浓度的液相色谱-质谱联用(LC-MS)法。方法血浆样品采用1 mol·L~(-1)硼酸盐缓冲液(pH 9.0)碱化、乙酸乙酯-正庚烷(85:15,V:V)萃取后LC-MS测定。色谱柱:Zorbax SB-C_(18)柱(150 mm×3 mm,3.5μm);流动相:乙腈-0.01 mol·L~(-1)乙酸胺缓冲液(含1%甲酸)(45:55,V:V);流速:0.3 mL·min~(-1);柱温:40℃。采用电喷雾正离子模式离子化,用于定量分析的离子分别为m/z 309.2(阿普唑仑)、m/z 325.2(α-羟基阿普唑仑)和m/z 343.2(三唑仑,内标)。结果阿普唑仑和α-羟基阿普唑仑的线性范围分别为0.5～50μg·L~(-1)和0.5～32μg·L~(-1),两者定量下限均为0.5μg·L~(-1),提取回收率均>80%,方法回收率为97.3%～102.5%,批内RSD≤10.4%,批间RSD≤12.2%。结论本方法灵敏、准确、重现性好,适用于阿普唑仑犬体内药动学研究。     

Simultaneous determination of quetiapine and three metabolites in human plasma by high-performance liquid chromatography-electrospray ionization mass spectrometry

AIM: To develop a high performance liquid chromatography-electrospray mass spectrometry (HPLC-MS/ESI) method for simultaneous determination of quetiapine and its sulfoxide-, 7-hydroxy-, 7-hydroxy-N-dealkyl-metabo-lites in human plasma. METHODS: The HPLC separation of the compounds was performed on a Kromasil C18, (5 urn, 4.6 mm×150 mm) column, using water (formic acid: 1.70 mmol/L, ammonium acetate: 5.8 mmol/L)-acetoni trile (65:35) as mobile phase, with a flow-rate of 0.95 mL/min. The compounds were ionized in the electrospray ionization (ESI) ion source of the mass spectrometer and detected in the selected ion recording (SIR) mode. The samples were extracted using solid-phase extraction columns. RESULTS: The calibration curves were linear in the ranges of 10-2000 μg/L for quetiapine, 1-200 μg/L for its metabolites, respectively. The average extraction recoveries for all the four samples were above 85 %.     

氯酚伪麻缓释片中氯雷他定在健康志愿者体内的药动学(英文)

目的:研究健康受试者单剂量及多剂量口服氯酚伪麻缓释片后氯雷他定的药动学特征。方法:24名健康受试者随机分为Ⅰ、Ⅱ两组,每组男、女受试者各6名,Ⅰ组受试者首先单次口服氯酚伪麻缓释片1片;间隔1 wk清洗期后,该组继续进行多次给药试验,受试者连续5 d,每日2次,每次1片,d 6早晨服药1次;Ⅱ组受试者单次口服氯酚伪麻缓释片2片。用HPLC-MS法测定血浆中氯雷他定的浓度,计算药动学参数。结果:健康受试者单次口服氯酚伪麻缓释片1片、2片后,氯雷他定的药动学参数分别为:c_(max)为(1.5±s 0.7)和(3.1±1.3)μg·L~(-1),AUC为(5.7±2.7)和(11±5)μg·h·L~(-1),2组的t_(1/2)和t_(max)相近。多次给药后氯雷他定的药动学参数:AUC~(ss)为(5.9±2.4)μg·h·L~(-1),c_(max)~(ss)、c_(min)~(ss)和c_(av)~(ss)分别为(1.8±0.9)、(0.15±0.06)和(0.49±0.20)μg·L~(-1),D(F)为(3_3±0.8)%。结论:单次口服氯酚伪麻缓释片后,氯雷他定呈线性药动学特征;多次给药后氯雷他定的体内药动学特征无显著变化。     

胶体金法与液相色谱-质谱法MDMA检测比较

目的：通过胶体金法对药物滥用患者尿液中3,4-亚甲基二氧基甲基苯丙胺（MDMA）及代谢产物进行检测,并与液相色谱一质谱法检测结果进行比较以验证其检测效果。方法：选取广州市脑科医院物质依赖科收治的药物滥用患者,分别采用胶体金法和液相色谱一质谱法检测其尿液中MDMA及相关成分,计算分析胶体金法检测试剂的灵敏度、特异度、Youden指数与总符合率。结果：在以液相色谱-质谱法为金标准的检测结果对比中,胶体金法检测试剂的灵敏度100．00％,特异度98．88％,Youden指数0．9888,样本检测总符合率98．97％,Kappa=0．936,P=0．00。结论：与液相色谱-质谱法相比较,胶体金法具有操作简便、直观、快速、省时的特点,其特异性、敏感性较高,具有良好的检测效果。     

液相色谱-质谱联用法考察多西他赛脂质体犬体内药动学

目的:研究多西他赛脂质体Beagle犬体内药动学。方法:采用单剂量双周期自身交叉设计, Beagle犬前肢皮下头静脉分别滴注多西他赛脂质体和多西他赛注射液(参比制剂),建立液相色谱-质谱联用(LC-MS)法测定不同时间血浆中多西他赛浓度。结果:多西他赛在0．5～2 000μg·L~(-1)范围内线性关系良好(r＞0．99),提取回收率大于90%,日内、日间精密度RSD＜15%。多西他赛脂质体和多西他赛注射液,CL分别为(11±s 6)和(25±6)L·h~(-1),AUC_(0～∞)分别为(2630±1115)和(1148±310)μg L~(-1)·h,MRT分别为(4．1±2．0)和(2．7±1．3)h,且2种制剂的CL、AUC_(0～∞)和MRT均具有显著或非常显著差异。结论:本方法灵敏度高,准确、可靠。与多西他赛注射液相比,多西他赛脂质体具有一定的缓释和长循环特征。     

LC-MS/MS法测定地氯雷他定的浓度及其在生物等效性研究中的应用

目的建立液相色谱-串联质谱(LC-MS/MS)法测定人血浆中地氯雷他定的浓度,并应用于2种地氯雷他定制剂的人体生物等效性研究。方法采用双周期自身随机交叉试验设计,18名男性健康志愿者分别单剂量口服地氯雷他定口腔崩解片(受试制剂)和地氯雷他定片(参比制剂)10 mg,采用LC- MS/MS法测定人血浆中地氯雷他定的浓度,利用3P97程序计算主要药动学参数,并对2种制剂进行生物等效性评价。结果受试制剂和参比制剂的t_(max)分别为(2.8±s 0.6)和(2.9±0.6)h,c_(max)分别为(4.8±2.1)和(5.0±2.2)μg·L~(-1),A UC_(0～96)分别为(59±30)和(58±26)μg·h·L~(-1),A UC_(0～∞)分别为(64±29)和(62±26)μg·h·L~(-1)。受试制剂的相对生物利用度为(103±32)%。经统计学检验,2种制剂的主要药动学参数间无显著差异。结论所建立的LC-MS/MS法适合于人体血浆中地氯雷他定的测定。地氯雷他定受试制剂和参比制剂具有生物等效性。     

健康受试者口服西嗪伪麻缓释片后西替利嗪的药动学

目的:建立口服西嗪伪麻缓释片后西替利嗪血药浓度的液相色谱-质谱(LC-MS)测定法,进行人体药动学研究。方法:采用LC-MS法,测定10名健康受试者口服受试制剂(单剂量含西替利嗪5,10 mg和多剂量)后血浆中西替利嗪浓度。结果:口服受试制剂(单剂量含西替利嗪5 mg)后,估算的西替利嗪的药动学参数t1/2β为(9．8±s 2．3)h;tmax为(1．1±0．3)h,cmax为(171±14)μg·L-1,V1／F为(31±5)L,V／F为(45± 9)L,AUC0-(?)为(1 730±187)μg·h·L-1,MRT0-(?)为(10．4±0．7)h。口服受试制剂(单剂量含西替利嗪10 mg) 后,估算的西替利嗪的药动学参数t1/2β为(9．2±1．8)h;tmax为(1．3±0．5)h,cmax为(343±54)μg·L-1,V1／F为 (26±11)L,V／F为(38±12)L,AUC0-(?)为(3 226±298)μg·h·L-1,MRT0-(?)为(10．1±0．8)h。多剂量口服受试制剂后,估算的西替利嗪的药动学参数t1/2β为(10．0±2．3)h,tmax为(1．3±0．4)h,cmax为(268±25)μg·L-1,V1／ F为(17±5)L,V／F为(26±9)L,AUC0-(?)为(2 616±324)μg·h·L-1,MRT0-(?)为(10．0±0．8)h。结论:本方法结果准确,灵敏度高,西替利嗪在大部分人体内的过程符合二室开放模型,其主要药动学参数与国内外文献报道单方西替利嗪数据一致。     

复方法莫替丁咀嚼片的人体药动学

目的：研究健康受试者单剂量口服复方法莫替丁咀嚼片的人体药动学。方法：12名健康受试者分别单剂量口服复方法莫替丁咀嚼片,以氨甲苯酸为内标,采用液相色谱-质谱-质谱(LC-MS/MS)正离子选择性反应检测法测定法莫替丁血浆及尿药浓度,用3P97软件计算药动学参数。结果：口服法莫替丁咀嚼片10 mg后,血浆药动学参数分别为c_(max)(53±s17)μg·L~(-1),t_(max)(2．7±0．8)h,t_(1/2)(3．2±0．5)h,AUC_(0-24)(309±91)h·μg·L~(-1),AUC_(0-∞)(312±91)h·μg·L~(-1),MRT(5．2±0．5)h；24 h尿药累积排泄量为(41±20)%。结论：建立的LC-MS/MS测定法专属准确,灵敏度适宜。可用于药动学参数的测定。     

Limitation standard of toxic aconitines in Aconitum proprietary Chinese medicines using on-line extraction electrospray ionization mass spectrometry

Development of rapid analytical methods and establishment of toxic component limitation standards are of great importance in quality control of traditional Chinese medicine. Herein, an on-line extraction electrospray ionization mass spectrometry (oEESI-MS) coupled with a novel whole process integral quantification strategy was developed and applied to direct determination of nine key aconitine-type alkaloids in 20 Aconitum proprietary Chinese medicines (APCMs). Multi-type dosage forms (e.g., tablets, capsules, pills, granules, and liquid preparation) of APCM could be determined directly with excellent versatility. The strategy has the characteristics of high throughput, good tolerance of matrix interference, small amount of sample (∼0.5 mg) and reagent (∼240 μL) consumption, and short analysis time for single sample (<15 min). The results were proved to be credible by high performance liquid chromatography−mass spectrometry (LC–MS) and electrospray ionization mass spectrometry, respectively. Moreover, the limitation standard for the toxic aconitines in 20 APCMs was established based on the holistic weight toxicity (HWT) evaluation and the Chinese Pharmacopoeia severally, and turned out that HWT-based toxicity evaluation results were closer to the real clinical applications. Hence, a more accurate and reliable APCM toxicity limitation was established and expected to play an important guiding role in clinics. The current study extended the power of ambient MS as a method for the direct quantification of molecules in complex samples, which is commonly required in pharmaceutical analysis, food safety control, public security, and many other disciplines.