中空纤维液相微萃取-气质联用检测血液中的三唑仑

目的建立中空纤维膜液相微萃取-气质联用测定血液中三唑仑的方法。方法取2mL全血用pH9缓冲溶液稀释至10mL制成样品溶液,采用中空纤维膜进行液相微萃取,直接抽取中空纤维内腔中的有机溶剂进行GC/MS分析。考察和选择最优萃取条件,包括中空纤维长度、萃取剂、萃取温度、搅拌速率、萃取时间,并进行方法学评价。结果最优萃取条件为:5cm长中空纤维,萃取剂为辛醇,萃取温度为30℃,搅拌速率为600r/min,萃取时间为30min。方法学评价表明线性范围为0.1~10.0μg/mL(r=0.999 0),相对标准偏差在0.8%~2.5%,检测限为72.8ng/mL,回收率为74%,富集倍数为165。结论本文方法萃取和浓缩一步完成,简便、快速、消耗有机溶剂少,重现性好,可在血液三唑仑药物检测中选用。     

离子液体分散液相微萃取-HPLC检测血浆中溴敌隆

目的建立离子液体分散液相微萃取-HPLC检测血浆中溴敌隆的方法。方法以1-己基-3-甲基咪唑六氟磷酸盐([HMIM]PF6)为萃取剂,甲醇为分散剂,提取血浆中的溴敌隆,用HPLC分析其含量;考察了萃取剂和分散剂体积、样品pH值、NaCl浓度、萃取时间和离心时间等因素对萃取效率的影响。结果优化的溴敌隆分散液相微萃取操作条件为:萃取剂[HMIM]PF650μL,分散剂甲醇100μL,样品pH值5.0,萃取时间5min,离心时间8 min。方法的线性范围:0.01～5.0μg/mL,检测限:1.1 ng/mL(S/N3)。该法低、中、高浓度的平均加标回收率分别为76.4%,82.6%,92.1%,RSD分别为4.17%,2.99%,1.67%(n=6)。结论本方法检测血浆中的溴敌隆,简便快速、准确实用,满足中毒检测及临床诊断治疗的需要。     

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。     

用气相色谱法/电子捕获检测器测定尿液中的三唑仑

建立了用气相色谱／电子捕获检测器测定尿液中三唑仑含量的方法。2ml尿样在破性条件下用2ml×2氯仿提取净化后,60℃水浴下用空气吹干,残留物用环己烷定容溶解后,进气相色谱仪分析,三唑仑的保留时间为10．74min。最低检测限为0．5ng／ml,回收率为95．98％,变异系数为7．85％（n＝5）。在2～50ng／ml浓度范围内有良好的线性关系：A＝－67．9＋570．IC,r＝0．9939。     

血液和尿液中多种头孢菌素的HPLC分析

目的 建立检测血液和尿液中头孢唑啉、头孢拉定、头孢哌酮和头孢噻肟的高效液相色谱法,并考察方法的适用性.方法 以乙酰苯胺为内标,血液和尿液用乙腈直接沉淀蛋白,采用Agilent Zorbax SB-Aq(250min×4.6mm,5 μm)色谱柱,流动相选用水(含0.12%三乙胺和0.12%乙酸)和乙腈的混合溶剂梯度洗脱,流速1 mL/min,检测波长254nm.结果 4种头孢菌素分离完全,工作曲线相关性均良好(r>0.9990),检出限为0.01μg/mL,回收率均不低于81.2%.结论 所建立的方法对血液和尿液中以上4种头孢菌素的检测快速、简便、准确,适用于实际检案中头孢菌素类药物的分析.     

QuEChERS-LC/MS快速检测兽用麻药“舒泰”

目的本文对兽药"舒泰"中有效成分进行了结构确证,并建立了生物检材中替来他明和唑拉西泮的快速检验方法。方法在血液和尿液的生物检材中,通过加标实验,经QuEChERS萃取后,进行LC/MS对替来他明和唑拉西泮的定性定量检测分析。结果在血液和尿液的生物样品的加标实验中,替来他明的RSD%在0.5%~3.5%,唑拉西泮的RSD在0.5%~1.1%;替来他明的回收率在75.8%~100.3%,唑拉西泮的回收率在68.8%~76.6%,其中血液中替来他明的方法检出限为0.16ng/mL,尿液中为0.20ng/mL,唑拉西泮在血液中的方法检出限0.17ng/mL,尿液中为0.22ng/mL。结论建立的QuEChERS萃取方法,操作流程简便,方法重现性好,只需100μL取样量,更适合于痕量生物检材中替来他明和唑拉西泮的检验分析。     

顶空固相微萃取气相色谱法快速检测尿液中氯胺酮

目的建立快速检测吸毒人员尿液中氯胺酮的顶空固相微萃取(HS/SPME)-GC/NPD的方法。方法样品瓶中加入尿液、氢氧化钠溶液、氯化钠,在95℃下加热搅拌,用聚二甲基硅氧烷SPME萃取头(100μm)顶空萃取20min,气相色谱氮磷检测器检测,外标法定量。结果尿液中氯胺酮浓度在0.2~20.0μg/ml范围内呈现线性关系(r2=0.9965),尿液添加1.0μg氯胺酮,平均回收率102.6%,RSD=3.39%(n=7),检测限1.13ng/ml(S/N=3)。结论建立的方法简单、快速、灵敏、准确,十分适合尿液等生物检材中氯胺酮的快速定性定量分析。     

应用一滴溶剂萃取（SDE）技术提取尿样中苯丙胺类毒品

目的建立一滴溶剂萃取技术（SDE）在尿样中苯丙胺类毒品检验的提取优化方法。方法通过GC／NPD分析，系统考察了溶剂体积，萃取溶剂，搅拌速度，萃取时间等参数对苯丙胺类毒品的SDE萃取效率的影响。结果经实验研究，建立了SDE最优化方法。结论SDE技术是一种新型样品前处理技术，具有操作简单快速，成本低廉等特点，在毒物毒品检验中具有广泛的应用前景。     

苯二氮卓类新精神活性物质去氯依替唑仑的定性检验方法研究

目的建立苯二氮卓类新精神活性物质去氯依替唑仑的气相色谱-质谱(GC-MS)和超高效液相色谱-四极杆-飞行时间质谱(UPLC-Q-TOF MS)定性检验方法。方法未知样品用甲醇和水提取,取上清液,采用GC-MS和UPLC-Q-TOF MS进行分析。结果经GC-MS检测,保留时间为17.73 min的未知组分的质谱碎片主要特征离子峰有m/z 279,308,239,252,225,77,126。经UPLC-Q-TOF MS检测,保留时间为4.781 min的未知组分的准分子离子峰为309.1173,碰撞诱导解离(CID)模式下二级质谱主要离子有m/z 280.0776,255.0952,240.0719,225.0604,206.0748。经缴获毒品分析科学工作组(Scientific Working Group for the Analysis of Seized Drugs,SWGDRUG)分析谱库检索和文献查询获得的信息资料进行比对,鉴定为去氯依替唑仑。结论该方法具有分析简便、快速的特点,可以用于实际案件的检测。     

DPX-GC/MS法分析尿液中新精神活性物质二苯基乙基哌啶

目的建立一种枪头式分散固相微萃取-气相色谱质谱法,分析尿液中的二苯基乙基哌啶。方法对影响萃取效果的吸附树脂种类、淋洗液种类、洗脱液种类和洗脱液用量进行优化考察。结果在最佳实验条件下,尿液中二苯基乙基哌啶的线性范围为0.02~1.0 mg/L,相关系数r²>0.99,检出限为0.005mg/L,回收率在76.7%~85.5%之间,相对标准偏差(RSD)为1.8%~2.8%之间(n=6)。结论该方法萃取效果好,操作步骤少,简便快速,线性范围良好,回收率和精密度均能满足检验需求。     

磁力搅拌超声乳化微萃取用于血清中有机磷农药的检测

目的将涡旋搅拌与超声乳化技术相结合,建立了磁力搅拌结合超声辅助乳化微萃取新方法。方法使用一套自制前处理装置,将所建立的方法应用于血清中的7种有机磷农药的前处理过程中,并联用GC/MS对其进行了检测。考查了影响方法萃取效率的若干因素,确定了最优条件:90μL甲苯作为萃取剂;磁力搅拌转速为200rpm;超声萃取时间为2 min。结果在此条件下,针对血清中的7种有机磷农药的相对回收率为83%~109%,RSD为3.5%~5.6%,检出限为0.08~1.6μg/L。结论该方法操作简便、快速、准确,适合于血清中有机磷农药的测定。     

Rapid confirmation of enzyme multiplied immunoassay technique (EMIT) cocaine positive urine samples by capillary gas-liquid chromatography/nitrogen phosphorus detection (GLC/NPD)

A rapid gas-liquid chromatographic (GLC) method was developed for the confirmation of benzoylecgonine (BE) positive urine samples screened by the enzyme multiplied immunoassay technique (EMIT) assay. The procedure is performed by solvent extraction of BE from 0.1 or 0.2 mL of urine, followed by an aqueous wash of the solvent and evaporation. The dried residue was derivatized with 50 microL of pentafluoropropionic anhydride and 25 microL of pentafluoropropropanol at 90 degrees C for 15 min. The derivatizing reagents were evaporated to dryness, and the derivatized BE, and cocaine if present, were reconstituted and injected into the gas chromatograph. The column was a 15-m by 0.2-mm fused silica capillary column, coated with 0.25 micron of DB-1, terminating in a nitrogen phosphorus detector (NPD). Cocaine and the pentafluoro BE derivatives retention times were 3.2 and 2.6 min, respectively. Nalorphine was used as reference or internal standard with a retention time of 4.78 min. The complete procedure can be performed in approximately 1.5 h. The EMIT cutoff between positive and negative urine samples is 300 ng/mL of BE. The lower limit of sensitivity of this method is 25 ng of BE extracted from urine. Validation studies resulted in confirmation of 101 out of 121 EMIT cocaine positive urine samples that could not be confirmed by thin-layer chromatography (TLC). This represents 84% confirmation efficiency.     

尿中异丙嗪及其代谢物含量硅藻土萃取紫外导数光谱测定法

目的建立尿中异丙嗪原体及其代谢物异丙嗪亚砜的提取测定方法。方法取尿直接倒入硅藻土柱中，用二氯甲烷洗脱，收集洗脱液50℃水浴挥干。剩余物用3．0ml 0．05mol／L硫酸溶解。加入锌粉沸水浴加热，放冷，测定二阶导数光谱。结果异丙嗪亚砜和异丙嗪萃取率均达90％以上，线性范围0．5～5．0μg／ml。结论该方法操作简便，提取率高，重现性好，结果可靠。     

Determination of cocaine and benzoylecgonine in human amniotic fluid using high flow solid-phase extraction columns and HPLC.

A new solid-phase extraction procedure for the determination of cocaine and benzoylecgonine in amniotic fluid, using high flow co-polymeric sorbents is reported. The recoveries of cocaine and benzoylecgonine within the range 0.1-1 mg/l were 95.7% and 50.3%, respectively. The use of high-flow sorbents allowed the easy extraction of amniotic fluid regardless of sample viscosity or physical nature. The use of these solid-phase columns provided many advantages over the more commonly used solvent extraction, including an increase in extraction speed and efficiency, reduced operator time, reduced solvent use and disposal volumes and exceptional extract quality. Further, the determination of amniotic fluid obtained from pregnant cocaine users may provide important information about handling of cocaine by the fetus at various gestational ages. The procedure was successfully applied to amniotic fluid from suspected cocaine abusers.     

Application of solvent microextraction to the analysis of amphetamines and phencyclidine in urine

A fast and simple method to detect some commonly abused illicit drugs, amphetamine, methamphetamine, 3,4-methylendioxy-amphetamine (MDA), 3,4-methylendioxy-methamphetamine (MDMA), 3,4-methylendioxy-N-ethylamphetamine (MDEA) and phencyclidine (PCP) in urine using solvent microextraction (SME) combined with gas chromatography (GC) analysis has been developed. The extraction is conducted by suspending a 2 microl drop of chloroform in a 2 ml urine sample. Following 8 min of extraction, the organic solvent is withdrawn into the syringe and injected into a GC with a pulsed discharge helium ionization detector (PDHID). The effects of different extraction solvents and times, pH and sample preparation were studied. The optimized method was capable of detecting drugs in urine at concentrations below Substance Abuse and Mental Health Services Administration (SAMHSA) established cut-off values for preliminary testing. Good linearity and reproducibility of extraction were obtained. The limits of detection were 0.5 microg/ml for amphetamine, 0.1 microg/ml for methamphetamine and MDA, 0.05 microg/ml for MDMA, 0.025 microg/ml for MDEA and 0.015 microg/ml for PCP. Relative standard deviation (R.S.D.) values ranged between 5 and 20% for the studied drugs.     

液相色谱-串联质谱法测定血液和尿液中秋水仙碱

目的建立检测血液和尿液中秋水仙碱的液相色谱-串联质谱法。方法0.5mL血液或尿液以丁丙诺啡为内标,经pH9.2硼酸盐缓冲溶液碱化后,用乙酸乙酯进行提取,在ZORBAX SB-C18液相柱(150mm×2.1mm×5μm)上以V(甲醇)∶V(20mmol/L乙酸铵和0.1%甲酸缓冲溶液)=80∶20为流动相,流速为0.2mL/min,采用电喷雾正离子模式离子化、多反应监测模式检测秋水仙碱,内标法定量。结果血液、尿液中秋水仙碱与内标丁丙诺啡色谱分离良好,秋水仙碱在0.1~50 ng/mL内均具有良好的线性,相关系数>0.9990,最低检出限为0.05ng/mL,方法回收率为94%~116%,日内与日间精密度(RSD)均小于8.5%。结论所建LC-MS-MS方法灵敏度高、操作简便、快速、准确,适用于血液及尿液等生物检材中痕量秋水仙碱成分的检测。     

SPE-LC-MS/MS法测定尿液与血液中海洛因3种代谢物

目的采用SPE-LC-MS/MS方法,同时检测尿液与血液中海洛因主要代谢物3-β-D-葡萄糖醛酸吗啡(M3G)、吗啡和O6-单乙酰吗啡(O6)。方法采用BAKERBONDTMspe Octadecyl(C18)进行提取,应用LC-MS/MS方法检测并通过MRM及内标法进行量化。结果尿液中M3G、吗啡、O6-单乙酰吗啡的最低检测限(LOD)分别为1.24pg、6.71pg、0.47pg;回收率依次为82.25±12.25%、93.75±13.25%、88.70±11.90%。血液中M3G、吗啡、O6-单乙酰吗啡的最低检测限分别为1.50pg、8.21pg、0.52pg。回收率依次为89.85±21.15%、73.70±17.90%、90.10±3.90%。结论本文所建方法同时适用于尿液与血液中海洛因主要代谢物M3G、吗啡、O6-单乙酰吗啡的提取、净化、分析。     

Aqueous phase hexylchloroformate derivatization and solid phase microextraction: determination of benzoylecgonine in urine by gas chromatography-quadrupole ion trap mass spectrometry.

A derivatization/solid phase microextraction (SPME) method for the determination of benzoylecgonine in urine was developed. The derivatization is conducted directly in 1 mL of urine while sonicating for 3 min with 12 microL of hexyl chloroformate and 70 microL of a mixture containing acetonitrile:water:hexanol:2-dimethylaminopyridine (5:2:2:1 v/v), yielding benzoylecgonine hexyl ester (BHE) as the product. After the 3 min period, an aliquot of 250 microL is transferred to a vial for SPME. After the desired extraction time the 100 microns polydimethylsiloxane SPME fiber was transferred to the GC-MS for separation and analysis with a quadrupole ion trap mass spectrometer. The hexyl chloroformate derivatization and SPME procedures were optimized for compatibility and sensitivity. The method was found linear for 0.10 to 20.0 micrograms/mL (r2 = 0.999) of benzoylecgonine in urine using benzoylecgonine-d3 as an internal standard (1.5 micrograms/mL). Intra-day precisions were 8.8 and 6.8% RSD for 0.30 microgram/mL and 17 micrograms/mL benzoylecgonine standards in urine (n = 6), respectively. Inter-day precision (n = 3) were < or = 3.3% RSD, indicating good reproducibility. A detection limit of 0.03 microgram/mL (S/N = 3) was achieved, thus making the SPME method a simplified alternative to SPE for GC-MS confirmation after EMIT tests for benzoylecgonine which have a cutoff of 0.30 microgram/mL. Quantitative results by SPME and SPE of two clinical urine specimens known positive for cocaine by EMIT were in excellent agreement. Benzoylecgonine was detected by the derivatization/SPME method in 22 out of 22 other urine specimens known positive for cocaine.     

Detection of saliva traces using test strips

The test strip Rapignost-Amylase (Behring) for the rapid determination of alpha-amylase in the urine is also suitable for the determination of salivary amylase in stains stored up to 6 weeks at room temperature. The stains are extracted with physiological saline (extraction time 30 min), then the application zone of the strip is wetted with the extract. Positive amylase-reaction is recognised as a reddish-violet colouration of the reaction zone. Biological stains with low amylase concentrations (urine semen, vaginal secretion, mucus) react amylase negative. The method is uncomplicated and can be completed within 30 min. The test strips are easily available and stable during storage. Therefore the determination of saliva with test strips should be preferred to the clinical methods if the storage times of the stain are not longer than 4-6 weeks. It is a suitable procedure to determine salivary stains for use in forensic biology.