LC-MS／MS法测定人血浆中盐酸洛哌丁胺

目的建立人血浆中盐酸洛哌丁胺的液相色谱-质谱联用测定法（LC-MS／MS）。方法血浆样品中盐酸洛哌丁胺与盐酸小檗碱（内标）经甲醇液．液提取后,采用ZORBAXSB—C18色谱柱（2．1mm×150mm×5μm）,柱温35℃,流动相为乙腈：0．1％甲酸（60：40,V／V）,流速为0．4mL／min,进样量10μL。电喷雾离子源（ESI）,正离子检测,以多反应监测（MRM）方式进行定量分析,用于监测的离子为m／z477→266（盐酸洛哌丁胺）和m／z366→292（内标）。结果盐酸洛哌丁胺的检测下限为0．2ng／mL（S／N=3）,在浓度0．5～500ng／mL范围内线性良好（r=0．9982）,低、中、高浓度（1ng／mL、20ng／mL、400ng／mL）的平均回收率分别为84．6％,88．5％和90．2％,日内与日问RSD分别小于6％与7％。结论LC—MS／MS法可用于盐酸洛哌丁胺的定性定量分析。     

固相萃取-液相色谱-串联质谱法测定全血中多塞平

目的建立固相萃取-液相色谱-串联质谱（SPE-LC-MS/MS）分析全血中多塞平的方法。方法以阿米替林为内标,全血样品经固相萃取处理后,通过液相色谱-串联质谱技术进行检测（电喷雾离子源正离子方式,多反应监测模式）。监测离子对m/z多塞平为280→107、280→235、280→220,阿米替林为278→233。多塞平和阿米替林的保留时间分别为15.15min和16.94min。结果全血中多塞平在0.005～1.00μg/mL质量浓度范围内呈线性关系,线性方程为y=3.2047x＋0.0339,相关系数（r）=0.9996,检出限为0.001μg/mL;平均提取回收率为78.0%～82.9%,日内精密度〈2.55%,日间精密度〈5.90%。结论本方法快速简便、灵敏、重现性好,适用于全血中多塞平的检测。     

LC-MS/MS快速筛分样本中的甲基苯丙胺、甲氧那明

目的建立准确可靠的甲氧那明、甲基苯丙胺初筛阳性样本的确证分析方法,排除由于服用甲氧那明而产生的假阳性结果。方法采用Kinetex~?C18 (100×2.1mm,2.6μm)色谱柱,乙腈和0.1%的甲酸梯度洗脱,流速0.4 mL/min。质谱条件:选用电喷雾离子源,在正离子电离模式下,采用多反应监测(MRM)的质谱扫描方式,甲氧那明、甲基苯丙胺的母/子离子对分别为:m/z 180.2→120.8和m/z 150.1→91.1。结果甲氧那明线性范围0.2～500ng/mL,线性相关系数0.9913,最低检测浓度(LOQ, S/N=3)为0.2ng/ml,空白添加回收率85.6%～98.3%。甲基苯丙胺线性范围0.05～500ng/mL,线性相关系数0.9968,最低检测浓度(LOQ, S/N=3)为0.05ng/ml,空白添加回收率91.4%～103.1%。结论本研究建立的LC-MS/MS分析方法准确、快速、有效,可用于因甲氧那明干扰初筛为阳性的样本进一步的确证是否含有甲基苯丙胺成分。     

全血中4种新型合成大麻素的快速检测

目的建立准确、快速的方法鉴定血液中4种新型合成大麻素(JWH-203、JWH-122、5F-APINACA和AB-CHMINACA)。方法全血样品经乙腈-甲醇提取后,经气相色谱-质谱(gas chromatography-mass spectrometry,GC-MS)进行筛选,采用液相色谱-串联质谱(liquid chromatography-tandem mass spectrometry,LC-MS/MS)进行确认,采用多反应监测模式进行定量分析。结果 GC-MS法于21 min完成分析,LCMS/MS法于5 min完成分析,AB-CHMINACA、JWH-203、5F-APINACA和JWH-122均采用准分子离子峰作为母离子,定量离子对分别为m/z 357.4→312.2、m/z 340.2→125.0、m/z 384.1→135.1、m/z 356.4→169.2。血液中4种合成大麻素在1～250 ng/mL质量浓度范围内线性良好(r0.99),检出限为0.1～0.5 ng/mL,提取回收率为85.4%～95.2%,精密度小于10.0%,基质效应为80.3%～92.8%。结论本研究得到了4种合成大麻素的GC-MS和LC-MS/MS色谱行为和质谱解析信息,初步讨论了色谱行为差异的可能原因,对判断合成大麻素的发展趋势有提示作用。本方法适用于血液中4种合成大麻素的快速检测,在目前新型合成大麻素滥用激增的情况下,可为此类物质的鉴定提供参考。     

高效液相色谱质谱联用法检测血中喹硫平

目的建立高效液相色谱质谱联用法(HPLC/MS/MS)测定血中喹硫平的方法。方法取0.2mL血用1.0mL乙腈沉淀蛋白,选用Phenomenex C18(2.6μm 100×2.1mm)色谱柱,以甲醇和0.1%甲酸水为流动相梯度洗脱,多反应监测模式(MRM)扫描,外标法定量。结果血中喹硫平浓度在1ng/mL~500ng/mL范围内线性良好,方法检测限和定量限分别为0.06ng/mL和0.2ng/mL,回收率大于75%,精密度小于10%。结论本文所建立方法适用于血中喹硫平定性定量检测,能够满足日常检验需要。     

超高效液相色谱-质谱法分析人全血中的氯化琥珀胆碱

目的建立超高效液相色谱串联质谱法（UPLC-MS/MS）测定氯化琥珀胆碱的方法。方法空白血中加入氯化琥珀胆碱标准溶液,经pH8氨水稀释后,涡旋离心,上清液过混合型弱阳离子交换柱（WCX）进行纯化,采用UPLCMS/MS检测。质谱检测采用正离子扫描,多反应离子监测模式（MRM）。以氯化琥珀胆碱母离子145.1（m/z）和子离子93.6及115.6（m/z）定性、定量。结果全血中氯化琥珀胆碱的回收率在75%~87%,日内和日间RSD均小于15%,最小检出限为0.01ng/mL。结论应用该方法对多起实际案例进行了检验,证明该方法快速、简便、灵敏,适用于氯化琥珀胆碱中毒的毒物学检验。     

HPLC-MS／MS法测定人全血中唑吡坦成分

目的 建立HPLC-MS/MS法测定人全血中唑吡坦的方法.方法 采用HPLC-MS/MS法测定人全血中唑吡坦的浓度,色谱柱:Xterra RP18(2.1×100mm, 3.5μm);流动相:甲醇∶10m mol/L醋酸铵水溶液(用乙酸调pH=6.0)40∶60;流速:0.2ml/min.结果 最低检测限为0.5ng/ml,血药浓度线性范围5.0～500ng/ml,高、中、低3种浓度的回收率分别为(103.95±2.96)%,(100.79±4.27)%,(96.06±7.7)%.     

固相萃取-液相色谱-质谱法检验人全血中的地塞米松

目的采用固相萃取结合液相色谱-质谱法检验人全血中地塞米松。方法采用SPE提取全血,用UPLC-MS/MS方法测定,采用ESI离子源,MRM方式监测。结果地塞米松的检出限为0.05ng/mL,线性范围1ng/mL~100ng/mL,方法回收率大于78.1%,日内、日间精密度均小于15%。结论 SPE-UPLC/MS/MS检验人全血中地塞米松的方法简单、高效,可应用于人全血中地塞米松的检验。     

LC-MS/MS同时分析血液中五种巴比妥类药物

目的建立血液中巴比妥类药物液相色谱-串联质谱(LC-MS/MS)检测方法。方法血液中的巴比妥类药物用有机溶剂液-液萃取,以乙酰水杨酸为内标,LC-MS/MS测定。结果检测血液中五种巴比妥类药物的最小检出限(LOD)均为10ng/mL,线性范围在0.02￣10μg/mL内良好,方法的回收率70%￣87%。结论所建方法快速、灵敏、准确,可以满足临床毒物和法庭毒物分析的需要。     

超分子溶剂萃取-气相色谱-串联质谱法检测尿液中苯二氮䓬类药物

目的建立一种尿液中9种苯二氮?类药物的超分子溶剂样品气相色谱-串联质谱(gas chromatography-tandem mass spectrometry,GC-MS/MS)分析方法。方法含9种苯二氮?类药物对照品的尿液样品用四氢呋喃和1-己醇组成的超分子溶剂进行液液萃取,取溶剂层氮吹至干,残余物用甲醇复溶后进行GC-MS/MS分析,数据采集方式为多反应监测模式,采用内标法定量。结果尿液中地西泮、咪达唑仑、氟硝西泮和氯氮平质量浓度在1~100ng/mL,劳拉西泮和阿普唑仑质量浓度在5~100ng/mL,硝西泮和氯硝西泮质量浓度在2~100ng/mL,艾司唑仑在质量浓度0.2~100ng/mL范围内具有良好的线性关系,相关系数为0.9991~0.9999,定量下限为0.2~5ng/mL,提取回收率为81.12%~99.52%,日内精密度[相对标准偏差(relative standard deviation,RSD)]和准确度(偏倚)分别小于9.86%、9.51%;日间精密度(RSD)和准确度(偏倚)分别小于8.74%、9.98%。室温和-20℃条件下,尿液中9种药物在15d内具有良好的稳定性。8名志愿者单摄口服阿普唑仑片后,在8~72h内尿液中阿普唑仑的质量浓度为6.54~88.28ng/mL。结论本研究建立的尿液中9种苯二氮?类药物的超分子溶剂萃取-GC-MS/MS分析方法,简便、快速、准确、灵敏,可为临床治疗及司法鉴定中苯二氮?类药物中毒监测提供技术支持。     

Determination of bromadiolone and brodifacoum in human blood using LC-ESI/MS/MS and its application in four superwarfarin poisoning cases

Superwarfarin poisoning is a growing health problem. A sensitive and reproducible LC-ESI/MS/MS (liquid chromatography electrospray ionization tandem mass spectrometry) method was developed and validated for the determination of bromadiolone and brodifacoum, the most commonly used superwarfarins, in human blood using warfarin-D5 as an internal standard. Bromadiolone and brodifacoum were extracted from whole blood samples by liquid-liquid extraction with ethyl acetate. Multiple-reaction monitoring (MRM) was used to detect bromadiolone and brodifacoum using precursor→product ion combinations of m/z 525→250 and 521→135, respectively. The calibration curves were linear (r(2)=0.9999) in the concentration range of 0.5-100.0ng/mL for bromadiolone and brodifacoum, with a lower limit of detection of 0.1 and 0.2ng/mL, respectively, in whole blood. This method detected trace levels of bromadiolone and brodifacoum in whole blood samples and can be used in the diagnosis of poisoned human beings.     

生物检材中乌头碱的LC-MS/MS快速分析

目的应用高效液相色谱-质谱法对生物检材中乌头生物碱等有毒成分进行快速分析。方法取全血样品经乙腈-甲醇(5:1 v/v)提取,使用Agilent Zorbax SB C18(2.1 mm×50 mm,1.8μm)色谱柱,以0.1%甲酸溶液-乙腈(60:40 v/v)为流动相等度洗脱。在多反应监测模式下测定全血样品中乌头生物碱等有毒成分。结果乌头碱、次乌头碱和中乌头碱的保留时间为0.73 min、0.77 min和0.63 min;用于定量分析的离子对分别为m/z 646.4→586.4(乌头碱)、616.1→556.5(次乌头碱)和632.4→572.1(中乌头碱)。乌头碱在0.1~250 ng/m L内线性关系良好,相关系数(r)≥0.9987,最低检出限0.1ng/m L,精密度考查其变异系数(CV)5.42%(n=6),血液中乌头碱提取回收率不小于90%。结论本文建立的高效液相色谱-质谱法快速、简便、灵敏,适用于天然药毒物检验。     

Determination and validation of tetrodotoxin in human whole blood using hydrophilic interaction liquid chromatography-tandem mass spectroscopy and its application

A sensitive analytical method was developed for the quantitative determination of tetrodotoxin (TTX), a powerful sodium channel blocker, in human postmortem whole blood. The sample mixture was cleaned up using cation exchange SPE catridge after protein precipitation by methanol and then separated on a PC-HILIC (phosphorylcholine hydrophilic interaction liquid chromatography) column (150 mm × 2.0mm i.d., 5 μm) using a isocratic elution of 1% acetic acid and acetonitrile. The identification of TTX was performed on tandem mass spectrometry with electrospray ionization interface in positive ion mode. The retention time of voglibose (internal standard) and TTX was 5.1 and 6.0 min, respectively. TTX and internal standard (voglibose) were monitored and quantitated using the ion transitions: the respective precursor to product ion combinations, m/z 320/302 for TTX and m/z 268/92 for voglibose in the multiple reaction monitoring (MRM) mode. The recovery of TTX and voglibose was 61.4% and 62.8%, respectively and the good accuracy (97.7-103.9%), linearity (2-1200 ng/mL) and reproducibility were shown in this method. The limit of detection and limit of quantification were 0.32 ng/mL and 1.08 ng/mL, respectively. This method was applied in the case of three fishermen who were poisoned (including one death) by unknown fish on their boat in October 2010. In this case, the levels of TTX were 27.2, 30.0 and 29.7 ng/mL in heart blood, peripheral blood and serum of a victim, were 3.1 and 12.1 ng/mL in peripheral blood and 3.9 and 12.8 ng/mL in serum of two survivors, respectively.     

Determination of bromadiolone in whole blood by high-performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry

A rapid, sensitive and selective high-performance liquid chromatography tandem mass spectrometric method (HPLC/MS-MS) has been developed and validated for the determination of bromadiolone in whole blood using warfarin as an internal standard (IS). Bromadiolone was extracted from the whole blood samples by liquid-liquid extraction with ethyl acetate. Multiple-reaction monitoring (MRM) was used to detect bromadiolone and IS, using precursor --> product ion combinations at m/z 527 --> 465 and 307 --> 161, respectively. The calibration curve was linear (r2=0.998) in the concentration range of 0.5-100.0 ng/mL with a lower limit of quantification of 0.5 ng/mL in whole blood. Intra- and inter-day relative standard deviations (R.S.D.s) were less than 7.5 and 11.9%, respectively. Recoveries of bromadiolone ranged from 82.1 to 85.2%. This method is found to be determined trace bromadiolone in whole blood and can be used in the diagnosis of the poisoned human beings.     

LC-MS／MS测定尿液中可卡因及其代谢物苯甲酰爱康宁

目的建立尿液中可卡因(cocaine,COC)及其代谢物苯甲酰爱康宁(benzoylecgonine,BZE)的液相色谱-串联质谱分析方法。方法尿液经固相萃取后,用AllurePFP丙基柱分离,以V(甲醇):V(20mmol/L乙酸胺和0.1%甲酸的缓冲溶液)=80∶20为流动相,采用二级质谱多反应监测模式检测COC和BZE。按10mg/kg的剂量对豚鼠腹腔注射可卡因,给药后收集7d尿液。结果尿液中COC和BZE在2.0～100ng/mL质量浓度范围内线性关系良好(r=0.9995),最低检测限(LOD)为0.5ng/mL;回收率大于90%;日内和日间精密度均小于6%;豚鼠尿液中主要检测目标物是BZE,且BZE检测时限也较COC长。结论所建方法灵敏度高,选择性好,适用于尿液中可卡因和苯甲酰爱康宁的检测。     

Postmortem determination of the biological distribution of sufentanil and midazolam after an acute intoxication

A case is presented of a death caused by self-injection of sufentanil and midazolam. Biological fluids and tissues were analyzed for midazolam by high performance liquid chromatography (HPLC) and gas chromatography/mass spectrometry (GC/MS) and for sufentanil by GC/MS. Midazolam was extracted from basified fluids or tissues homogenated with n-butyl chloride and analyzed by HPLC by using a phosphate buffer: acetonitrile (60:40) mobile phase on a mu-Bondapak C18 column at 240 nm. Sufentanil was extracted from basified fluids and tissue homogenates with hexane:ethanol (19:1). GC/MS methodology for both compounds consisted of chromatographic separation on a 15-m by 0.25-mm inside diameter (ID) DB-5 (1.0-micron-thick film) bonded phase fused silica capillary column with helium carrier (29 cm/s) splitless injection at 260 degrees C; column 200 degrees C (0.8 min) 10 degrees C/min to 270 degrees C; and electron ionization and multiple ion detection for midazolam (m/z 310), methaqualone (IS, m/z 235), sufentanil (m/z 289), and fentanyl (IS, m/z 245). Sufentanil concentrations were: blood 1.1 ng/mL, urine 1.3 ng/mL, vitreous humor 1.2 ng/mL, liver 1.75 ng/g, and kidney 5.5 ng/g. Midazolam concentrations were: blood 50 ng/mL, urine 300 ng/mL, liver 930 ng/g, and kidney 290 ng/g. Cause of death was attributed to an acute sufentanil/midazolam intoxication and manner of death a suicide.     

Validated method for the simultaneous determination of Delta9-THC and Delta9-THC-COOH in oral fluid, urine and whole blood using solid-phase extraction and liquid chromatography-mass spectrometry with electrospray ionization

A fully validated, sensitive and specific method for the extraction and quantification of Delta(9)-tetrahydrocannabinol (THC) and 11-nor-9-carboxy-Delta(9)-THC (THC-COOH) and for the detection of 11-hydroxy-Delta(9)-THC (11-OH THC) in oral fluid, urine and whole blood is presented. Solid-phase extraction and liquid chromatography-mass spectrometry (LC-MS) technique were used, with electrospray ionization. Three ions were monitored for THC and THC-COOH and two for 11-OH THC. The compounds were quantified by selected ion recording of m/z 315.31, 329.18 and 343.16 for THC, 11-OH THC and THC-COOH, respectively, and m/z 318.27 and 346.26 for the deuterated internal standards, THC-d(3) and THC-COOH-d(3), respectively. The method proved to be precise for THC and THC-COOH both in terms of intra-day and inter-day analysis, with intra-day coefficients of variation (CV) less than 6.3, 6.6 and 6.5% for THC in saliva, urine and blood, respectively, and 6.8 and 7.7% for THC-COOH in urine and blood, respectively. Day-to-day CVs were less than 3.5, 4.9 and 11.3% for THC in saliva, urine and blood, respectively, and 6.2 and 6.4% for THC-COOH in urine and blood, respectively. Limits of detection (LOD) were 2 ng/mL for THC in oral fluid and 0.5 ng/mL for THC and THC-COOH and 20 ng/mL for 11-OH THC, in urine and blood. Calibration curves showed a linear relationship for THC and THC-COOH in all samples (r(2)>0.999) within the range investigated. The procedure presented here has high specificity, selectivity and sensitivity. It can be regarded as an alternative method to GC-MS for the confirmation of positive immunoassay test results, and can be used as a suitable analytical tool for the quantification of THC and THC-COOH in oral fluid, urine and/or blood samples.     

血中精神药物的气相色谱-质谱分析

目的建立人血中精神药物的GC-MS测定方法。方法样品在pH12条件下用乙醚萃取,SKF_525A为内标。以DB-5MS石英毛细管柱、EI源、不分流进样测定人血中四种精神药物。结果人血中四种精神药物与内标物分离良好,血药浓度在0.2-1.0μg,／ml范围内呈线性关系,R2≥0.9728,最低检出限为0.01μg(S／N≥3),血中精神药物的最低检出浓度为0.05μg／ml(S／N≥3),提取率72.5％～89.3％,RSD≤5.17％。四种精神药物日内差RSD≤3.7％(n=5)。结论本法可用于精神药物的血药浓度监测。