液相色谱-串联质谱法分析生物检材中的河豚毒素

目的建立血液、尿液以及肝中河豚毒素(tetrodotoxin,TTX)的液相色谱-串联质谱分析方法,并进行方法学验证。方法血液、尿液和肝用1%乙酸甲醇溶液去蛋白后,上清液用固相萃取法净化,LC-MS/MS检测。结果血液、尿液和肝中TTX检出限分别为2ng/mL、2ng/mL和4ng/g。血液和尿液在4～100ng/mL、肝在5～100ng/g的范围内线性关系良好,相关系数r≥0.9973;日内精密度和日间精密度均在12.80%以内;回收率大于47.2%。结论所建方法高效、灵敏、准确,可以为河豚毒素中毒的法医学鉴定、临床诊治以及食品安全的监控提供技术保障。     

QTRAP LC-MS/MS方法分析头发中氯胺酮结构类似物

目的 建立头发中氯胺酮结构类似物的液相色谱-四极杆/线性离子阱质谱（QTRAP LC-MS/MS）的检测方法。方法 将洗净晾干的20 mg头发加入1 mL提取液冷冻研磨后冰浴超声提取,离心取上清液过滤膜后,经ACQUITY UPLC?HSS T3色谱柱分离,采用多反应监测模式同时测定10种氯胺酮结构类似物。以该方法分析20例阳性头发样本中乙基氟胺酮、去甲氟胺酮和替来他明的含量。结果 头发中10种氯胺酮结构类似物在0.01～2.00ng/mg范围内线性关系良好,相关系数> 0.99,回收率为89.1%～106.1%,基质效应为88.3%～106.0%。20例阳性头发样本中乙基氟胺酮的含量范围为0.02～8.35 ng/mg,平均值1.59 ng/mg,中位值0.40 ng/mg;去甲氟胺酮的含量范围为0.01～0.94 ng/mg,平均值0.28 ng/mg,中位值0.19 ng/mg;替来他明的含量范围为0.02～10.93 ng/mg,平均值2.69 ng/mg,中位值2.11 ng/mg。结论 本方法简便、高效、可靠,适用于头发中氯胺酮结构类似物的检验。样本数据为氯胺酮结构类...     

电子烟油和毛发中合成大麻素CUMYL-PEGACLONE的检测

目的建立联合高效液相色谱-串联质谱法（highperformanceliquidchromatography-tandem massspectrometry,HPLC-MS/MS）和气相色谱-质谱法（gaschromatography-massspectrometry,GC-MS）检测电子烟油和毛发中合成大麻素5-戊基-2-(2-苯基丙-2-基)-2,5-二氢-1H-吡啶[4,3-b]吲哚-1-酮（CUMYL-PEGACLONE）的方法。方法 采用HPLC-MS/MS和GC-MS建立CUMYL-PEGACLONE检测方法,对涉毒人员毛发和查获的电子烟油进行检测。结果 GC-MS测得CUMYL-PEGACLONE主要质谱特征离子m/z为91、179、197、254和372;CUMYL-PEGACLONE在2～50 ng/mL质量浓度范围内线性关系良好,线性相关系数（r）大于0.99;毛发中CUMYL-PEGACLONE的HPLC-MS/MS方法检出限为0.01 ng/mg,定量限为0.02 ng/mg;电子烟油中CUMYL-PEGACLONE的HPLC-MS/MS方法检出限为1 ng/m...     

气相色谱-质谱法测定涉案奶粉中辛硫磷的含量

目的 建立基于气相色谱-质谱法（GC-MS）测定奶粉中辛硫磷含量的方法。方法 对待测样品进行乙酸乙酯萃取,利用Florisil固相萃取柱净化,淋洗液供GC-MS分析,设置适当的色谱质谱条件分析检测。结果 该方法在0.10～5.00 mg/L内具有良好的线性关系,辛硫磷在奶粉中的最低检出限为0.05 mg/L,加标回收实验结果表明,辛硫磷在奶粉中的平均回收率为98.2%～101%,相对标准偏差为2.1%～3.1%。案件检材样品在保留时间约8.377 min处出现与辛硫磷标准品相似色谱峰,且质谱定性离子[m/z 109（基峰）、m/z 135、m/z 298]与辛硫磷标准溶液一致,辛硫磷的含量为2.17 mg/kg。结论 该方法操作简单、灵敏度高、可行性强,可用于检测奶粉中的辛硫磷成分,为其他辛硫磷检测提供有益借鉴。     

头发中5-MeO-DiPT等12种新型色胺类致幻剂的UPLC-MS/MS分析方法研究

目的建立同时分析头发中5-MeO-DiPT等12种新型色胺类致幻剂的超高效液相色谱-串联质谱(UPLC-MS/MS)方法。方法以赛洛西宾-d4和赛洛新-d10为内标,20 mg头发样品加入1 mL提取液(含内标2 ng/mL的0.1%甲酸水溶液)后冷冻研磨,离心取上清液,经Waters Acquity^TM UPLC HSS T3色谱柱分离,采用多反应监测模式同时测定12种新型色胺类致幻剂。结果头发样品中12种色胺类新精神活性物质的检出限为1~10pg/mg,定量限为3~50pg/mg。在相应浓度范围内,12种色胺类新精神活性物质均具有良好的线性关系,相关系数大于0.99。本方法准确度为91.3%~113.5%,日间和日内精密度(RSD)均小于15%,回收率大于80%,无明显基质效应。结论该方法前处理简单、灵敏度高、选择性好,适用于法医毒物分析中新型色胺类致幻剂的鉴定。     

超高效液相色谱-质谱法测定人全血中甲胺磷、乙酰甲胺磷含量

目的应用超高效液相色谱-质谱法(UPLC-MS/MS)对人全血中甲胺磷、乙酰甲胺磷进行定量测定。方法采用去离子水直接稀释人全血,提取血中的甲胺磷及乙酰甲胺磷,以甲醇-水(含0.1%甲酸)为流动相梯度洗脱,正离子化多反应监测(MRM)模式测定。结果甲胺磷、乙酰甲胺磷的回收率均高于87%。在选定条件下全血中甲胺磷、乙酰甲胺磷的线性范围为2～200ng/ml,最小定量限为2ng/ml。结论将全血样品进行直接稀释并应用液相色谱-质谱法进行检测可作为甲胺磷及乙酰甲胺磷中毒的快速检测方法。     

高效液相色谱-飞行时间质谱法检测人血中的丁醚脲及其代谢产物

目的建立人血中丁醚脲及其代谢产物丁醚脲-脲和丁醚脲-甲烷亚胺的高效液相色谱-飞行时间质谱联用(HPLC-QTOF/MS)分析方法。方法取人血2mL,用2mL乙腈沉淀蛋白,选用Kinelex®Cl8(2.6μm 3.0mm×100mm)色谱柱,以0.1%甲酸+乙腈(A相)和5mmol/L甲酸铵溶液+0.1%甲酸溶液(B相)为流动相梯度洗脱分离,采用液相色谱-飞行时间质谱仪的电喷雾电离,正离子模式进行分析。结果该方法人血中的丁醚脲、丁醚脲-脲和丁醚脲-甲烷亚胺检出限分别为1.0、0.1、1.0 ng/mL;丁醚脲、丁醚脲-脲、丁醚脲-甲烷亚胺在0.5~100ng/mL范围内线性良好(R2=0.9991~0.9996),在3个浓度水平平均回收率为78.1%~98.5%,日内精密度为4.1%~5.5%,日间精密度为5.5%~9.0%。结论该方法样品前处理方法操作简便,专属性强、灵敏度较高,适用于人血中丁醚脲及其代谢产物的定性定量。     

超高效液相色谱-串联质谱法检测毛发中的玉米赤霉烯酮

目的基于超高效液相色谱-串联质谱技术,建立毛发中玉米赤霉烯酮的分析方法,为玉米赤霉烯酮的检测提供简捷、高效、可靠的分析测定方法。方法毛发样品经冷冻研磨后加入0.5 m L乙腈,置于冰水浴中超声30 min,采用AcquityTMUPLC HSS T3色谱柱分离,电喷雾负离子源进行离子化,多反应监测方式(MRM)对玉米赤霉烯酮的母离子及子离子进行监测,三重四极杆质谱测定。结果该方法在5~250 pg/mg范围线性良好:Y=0.007x+0.044(R2=0.999);玉米赤霉烯酮的检出限为2 pg/mg,定量限为5 pg/mg;提取回收率为90.9%~95.3%;基质效应88.2%~92.5%;准确度为93.5~107.8%,日内及日间精密度(RSD)均小于10%。结论本方法简便快速、灵敏度高、专属性强,可满足在食品安全和司法鉴定实践中对毛发中玉米赤霉烯酮测定的要求。     

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。     

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。     

HPLC-MS/MS法快速检测人体血液中的夹竹桃毒素

目的采用高效液相色谱-串联质谱法(HPLC-MS/MS)检测人体血液中夹竹桃苷、夹竹桃苷乙。方法采用乙腈沉淀蛋白法处理血液,HPLC-MS/MS法检测,采用MRM记录方式,保留时间和定性离子对定性,标准曲线法定量。结果夹竹桃苷、夹竹桃苷乙的检测限均在0.5ng/m L,线性范围在1ng/m L~1mg/m L,回收率为75.2%~95.7%。结论本方法操作简便,灵敏度高,可应用于中毒案件中人体血液中两种夹竹桃毒素(夹竹桃苷和夹竹桃苷乙)的快速检测。     

人毛发中36种芬太尼类物质的HPLC-MS/MS检测方法

建立了同时对人毛发中36种芬太尼类物质快速定性定量检测方法,并成功应用于实际案件的检测.利用高效液相色谱-串联质谱(HPLC-MS/MS)技术,采用MRM(多反应监测)模式,用Waters ACQUITY BEH C18(100mm×2.1 mm,1.7 μm)色谱柱,柱温50℃,流动相为甲醇-0.1％甲酸的水溶液(V...     

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。     

HPLC-MS/MS法检测血液中甲卡西酮及其代谢物

目的 建立同时检测血液中新精神活性物质甲卡西酮及其代谢物卡西酮、麻黄碱和伪麻黄碱含量的高效液相色谱-串联质谱方法 ,验证甲卡西酮在大鼠体内的代谢物.方法 血液样品中加入内标物甲卡西酮-D3,经甲醇提取后采用InfinityLab Poroshell 120 Chiral-V型色谱柱分离,以甲醇和乙腈混合流动相恒比洗脱,...     

人体毛发中硝甲西泮的HPLC-MS/MS检测

目的建立测定涉毒人员毛发样本中硝甲西泮的液相色谱-质谱/质谱(HPLC-MS/MS)分析方法。方法对质谱主要参数进行优化,采用电喷雾多反应监测模式(MRM)测定不同浓度标准样品并建立标准曲线,通过准确度、灵敏度和实际案例检材的检验对方法进行评价。结果标准溶液最低检出限0.1ng/mL,线性范围宽,R²>0.999,空白毛发外添加标样回收率>80%。结论优化后的毛发样本中硝甲西泮的HPLC-MS/MS操作简便快捷,灵敏度高,重现性好,具备定性定量的适用性和可靠性。     

生物检材中阿维菌素的HPLC—MS／MS分析

目的建立生物检材包括血、肝组织、胃组织中阿维菌素（Avermectins）的HPLC—MS／MS分析方法。方法采用Oasis HLB固相萃取柱进行提取,以XTerra^TM RP18柱（2．1mm×100mm,3．5μm）色谱柱分离,以甲醇-0．1％冰醋酸水溶液（75：25）为流动相,流速为0．2mL／min。结果线性范围10ng／mL～3μg／mL,最小检出限为0．1ng／mL。结论本方法准确、快速,可用于生物检材血中阿维菌素的定性定量分析,肝及胃组织中阿维菌素的定性分析。     

Determination of paraquat from formalin-fixed tissue

In this paper, a sulfuric acid digestion method and a clean-up technique by using cation exchange resin followed by XAD-2 resin has been developed for the determination of paraquat from formalin-fixed tissue at the submicrograms per gram level. Formalin-fixed tissue is dissolved by hot sulfuric acid, then paraquat is isolated and purified with cation exchange chromatography. The eluted paraquat forms an ion-pair with sodium dodecyl sulfate, it is then adsorbed on XAD-2 resin. Paraquat is eluted, extracted and reduced with solvent mixtures, NaCl solution and dithionite reagent, respectively. The calibration graphs of zero-order and second-derivative spectroscopy are linear in the range of 0.01-5.0 mg/kg. The relative standard deviation was less than 5% and the detection limit was 0.02 mg/kg based on 0.5-g samples. The sensitivity of the proposed method could be increased by using larger sample sizes. The method was precise and gave a quantitative recovery of paraquat spiked into formalin-fixed liver homogenates (78%). The proposed method has been satisfactorily applied to the determination of paraquat in the formalin-fixed tissues of suspected poisoned cases. It has been shown to be of great value in the field of forensic toxicology especially when formalin-fixed tissue only is available.     

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.     

Trace analysis of peroxide explosives by high performance liquid chromatography-atmospheric pressure chemical ionization-tandem mass spectrometry (HPLC-APCI-MS/MS) for forensic applications

An HPLC-APCI-MS(/MS) method for the (trace) analysis of the most commonly encountered peroxide explosives, hexamethylenetriperoxidediamine (HMTD) and triacetonetriperoxide (TATP), has been developed. With this method, HMTD and TATP have been analyzed in the same run. (Pseudo-)molecular ions of these peroxides have been obtained as base peak under the same condition. A series of product ions was produced from these pseudo-molecular ions ([HMTD - 1]+ and [TATP + NH4]+) in the MS/MS analysis. We also pioneered in showing that a TATP molecular ion [TATP + H]+ can be observed with HPLC-MS/MS. The limit of detection for HMTD and TATP was 0.26 and 3.3 ng, respectively, on column by HPLC-MS in the Full Scan mode and 0.08 and 0.8, respectively, by HPLC-APCI-MS/MS in Selected Reaction Monitoring (single mass unit) mode. The method presented has been applied successfully for the identification of peroxides in the bulk solid state (powder sample), as well as in post-blast extracts originating from a forensic case. For the post-blast extracts, the use of tandem MS has been shown clearly to be of crucial importance for the identification and detection of the peroxide explosives.     

HPLC-MS/MS方法检验血液中可待因

目的 采用HPLC-MS/MS方法对血液中可待因进行定性、定量检验.方法 以Clean Screen DAU混合阳离子交换固相萃取柱提取血样,应用HPLC色谱法分离,MS/MS检测分析.结果 该方法回收率高于70％,线性范围0.01～2 μg/mL,检测限0.1ng(S/N≥3).结论 本文方法快速、灵敏、准确,可用于血液中可待因的定性、定量分析检验.