兔体内三唑仑及其代谢物的检测

目的不同方法检测三唑仑及代谢物α-羟基三唑仑，为其及时、准确的检测提供科学证据和最优方法。方法用GC／NPD、GC／MS、MS／MS、GC／ECD对兔体内三唑仑及代谢物α-羟基三唑仑进行检测。结果GC／ECD法最易检测出三唑仑及其代谢物。结论兔胃及内容物、尿液中容易检测到三唑仑及其代谢物；运用酶水解后，检测率最高；GC／ECD检测三唑仑及其代谢物的灵敏度最高。     

SPE-HPLC/MS/MS法检测人唾液中地西泮及其代谢物

目的采用固相萃取-高效液相色谱-串联质谱法(SPE-HPLC/MS/MS)检测人唾液中地西泮及其代谢物。方法采用固相萃取法(SPE)处理唾液,HPLC/MS/MS法检测,MRM记录方式,保留时间和定性离子对定性,内标法和标准曲线法定量。结果地西泮及其代谢物去甲地西泮、去甲羟基西泮、去甲羟基地西泮葡萄糖醛酸苷(OG)、羟基地西泮葡萄糖醛酸苷(TG)的检测限在0.01ng/m L~0.5ng/m L之间,线性范围0.1ng/m L或0.5ng/m L~100ng/m L,回收率为84.9%~106%。口服5mg地西泮后15d内唾液中可检出地西泮及去甲西泮,但检出时间有个体差异,但去甲羟基西泮、TG和OG则不能检出。结论 SPE-HPLC/MS/MS检测法可应用于人唾液中地西泮及其代谢物的检测。人口服常量地西泮后唾液中可检出地西泮和去甲西泮,且检测窗口期较宽,但存在个体差异。     

地西泮及其Ⅰ、Ⅱ相代谢物在人尿液中的分解动力学

目的 研究不同储存条件下地西泮及其Ⅰ、Ⅱ相代谢物分别在人空白尿液中的分解动力学规律。方法人空白尿液中分别添加地西泮或其5种代谢物后，储存于不同条件（4℃、-20℃、20℃、1%NaF 20℃），高效液相色谱串联质谱法检测各目标物在不同保存时间点的含量。通过SPSS软件分析时间和储存条件与地西泮及其代谢物含量变化的相关性。结果 不同储存条件下尿液中地西泮、去甲西泮和奥沙西泮的含量比较稳定，而替马西泮、羟基西泮葡萄糖醛酸苷以及去甲羟基西泮葡萄糖醛酸苷的含量随着时间逐渐降低；此外，不同条件添加去甲羟基西泮葡萄糖醛酸苷组均于储存后第三天检出奥沙西泮，而其他添加组均未发现除添加物之外的其他目标物。结论 地西泮、去甲西泮和奥沙西泮比较稳定，而替马西泮、羟基西泮葡萄糖醛酸苷、去甲羟基西泮葡萄糖醛酸苷较容易分解；去甲羟基西泮葡萄糖醛酸苷的分解产物是奥沙西泮。     

乙醇对小鼠口服地西泮半数致死量及早期代谢的影响

目的研究乙醇对地西泮半数致死量及早期代谢的影响。方法 1利用AOT425tat Pgm程序测定雌性小鼠经口灌服地西泮单独或与不同剂量乙醇联合染毒时的半数致死量;2低、中、高剂量(50、100、200mg/kg)地西泮单独或与不同剂量乙醇联合染毒,HPLC法测定染毒后15、30、60min时小鼠心血中地西泮及其主要代谢物去甲西泮、奥沙西泮血药浓度,观察染毒早期乙醇对地西泮代谢的影响。结果 1联合染毒使地西泮LD50值明显降低,且下降幅度随乙醇剂量增加而加剧;2各联合染毒组染毒15、30、60min时地西泮、奥沙西泮血药浓度较单独染毒时低;50、100mg/kg地西泮与乙醇联合染毒60min时去甲西泮浓度较单独染毒显著升高,但乙醇剂量影响不大;高剂量地西泮与低、中剂量乙醇联合染毒60min时去甲西泮浓度较单独染毒组时低。结论 1地西泮与乙醇确有毒性协同作用,联合中毒时地西泮半数致死量变化与乙醇剂量有关;2染毒早期,乙醇可使地西泮及奥沙西泮血药浓度降低,同时抑制去甲西泮的代谢,使其药浓度升高,在毒性协同效应发生中有意义。     

2′-氯地西泮在大鼠体内分布及代谢降解规律研究

目的研究2′-氯地西泮及其代谢物(地洛西泮、氯甲西泮、劳拉西泮)在大鼠体内分布及代谢规律,为2′-氯地西泮相关案件的检验提供实验数据。方法40只SD大鼠随机分为4组,禁食12h,按2.625mg/kg 2′-氯地西泮灌胃给药,第一组给药后不同时间点经大鼠尾静脉采血,第二组为采血空白对照组,第三组给药30min后处死,取心、肝、肺、肾、脑、睾丸,经乙酸乙酯液液萃取后用高效液相色谱-三重四极杆质谱检测2′-氯地西泮及代谢物含量,第四组为分布空白对照组。结果2′-氯地西泮进入体内后,迅速代谢分布,在20min内达到血液最高浓度。2′-氯地西泮及代谢物在各器官中的分布特点为:肝>脑>心脏>肾>睾丸>肺。结论经灌胃2′-氯地西泮进入大鼠体内后,监测2′-氯地西泮及其代谢物在大鼠体内的分布及降解规律可以为2′-氯地西泮相关案件的检验鉴定提供参考依据。     

用GC／ECD方法分析海洛因中毒尿液吗啡代谢物

目的　考查尿检材中海洛因的代谢物吗啡和单乙酰吗啡的液液萃取条件、三氟乙酰化和气相色谱电子捕获检测 (GC/ECD)条件。方法　以烯丙吗啡为内标 ,氯仿∶异丙醇 (9∶1)为液相萃取剂萃取尿中的吗啡和单乙酰吗啡 ,采用MBTFA衍生化 (三氟乙酰化 ) ,GC/ECD检测。结果　尿中加样相对回收率吗啡 89% ,单乙酰吗啡 75 % ,最小检测量吗啡 5 0ng ,单乙酰吗啡 10 0ng。通过实验兔的中毒实验 ,对尿检材进行了分析。 结论　所建立的萃取与检测方法分析海洛因中毒尿检材中的吗啡准确、灵敏 ,可用于海洛因的吸毒检验     

2'-氯地西泮及其代谢物的药代动力学特征的LC/MS研究

目的利用液质联用法研究2’-氯地西泮及其代谢物在大鼠体内的药代动力学规律。方法SD大鼠经灌胃给药2’-氯地西泮2.625mg/kg,给药后采集不同时间的血样。蛋白沉淀法处理血浆样品后,进样分析。结果2’-氯地西泮及其代谢物在给药后1h均达到最高血药浓度。2’-氯地西泮在大鼠体内的半衰期约为93h,在给药后144h均能检测到。3种代谢产物地洛西泮、氯甲西泮、劳拉西泮在大鼠血浆的检出时限分别24h、144h、48h。结论2’-氯地西泮在大鼠体内吸收较快,半衰期较长,原体药物和代谢物在大鼠体内的检测窗口均较长。该研究可为临床救治2’-氯地西泮中毒患者以及相关案件的侦破提供一定的实验依据。     

尿样中苯骈二氮杂Zhu类药物筛选分析研究

目的建立尿样中苯骈二氮杂类药物两种筛选分析方法.方法用GC/ECD、GC/MS直接测定苯骈二氮杂类药物原体和GC/ECD、GC/MS测定1,4-苯骈二氮杂类药物的酸水解产物苯甲酮同系物.结果GC/ECD直接测定苯骈二氮杂类药物方法,大部分药物的回收率为60%～90%,线性范围为20～200ng/ml尿,线性相关系数大于0.99,最低检出限达0.5ng/ml～10ng/ml.结论所建两种方法各有其特点又可相互补充,已成功地应用于司法鉴定实践.     

GC/ECD检验生物检材中的氟乙酸钠

建立对生物检材中氟乙酸钠的GC/ECD检验方法。用PFBBr作衍生化试剂,对氟乙酸钠或氟乙酰胺中毒后脏器中的氯乙酸（氯乙酸钠）进行衍生化,GC/ECD和GC／MS的分析。在1ml血中添加lμg1080,其回收率为76．2％,RSD为3．07（n＝7）;在1g肝中添加2μg的1080其回收率为84．4％,RSD为1．87（n=5）。研究的方法经动物试验和大量中毒案件的验证,效果较好。该方法已在中毒案件的检验中广泛应用。     

新精神活性物质——芬纳西泮的检验

目的对缴获的嫌疑药片进行定性定量检验。方法采用GC/MS确证、GC/FID内标法定量检验。结果三起不同案件的嫌疑药片,均检出芬纳西泮,含量为0.5%~1.1%。结论不同时间、不同地区缴获的三起数量较大、外观基本相同的嫌疑药片活性成分均为芬纳西泮的检验结果应引起我国禁毒执法部门的高度重视。     

Exhaled breath for drugs of abuse testing — Evaluation in criminal justice settings

Exhaled breath is being developed as a possible specimen for drug testing based on the collection of aerosol particles originating from the lung fluid. The present study was aimed to evaluate the applicability of exhaled breath for drugs of abuse testing in criminal justice settings. Particles in exhaled breath were collected with a new device in parallel with routine urine testing in two Swedish prisons, comprising both genders. Urine screening was performed according to established routines either by dipstick or by immunochemical methods at the Forensic Chemistry Laboratory and confirmations were with mass spectrometry methods. A total of 247 parallel samples were studied. Analysis of exhaled breath samples was done with a sensitive mass spectrometric method and identifications were made according to forensic standards. In addition tested subjects and personnel were asked to fill in a questionnaire concerning their views about drug testing. In 212 cases both the urine and breath testing were negative, and in 22 cases both urine and breath were positive. Out of 6 cases where breath was negative and urine positive 4 concerned THC. Out of 7 cases where, breath was positive and urine negative 6 concerned amphetamine. Detected substances in breath comprised: amphetamine, methamphetamine, THC, methylphenidate, buprenorphine, 6-acetylmorphine, cocaine, benzoylecgonine, diazepam and tramadol. Both the prison inmates and staff members reported breath testing to be preferable due to practical considerations. The results of this study documented that drug testing using exhaled breath provided as many positives as urine testing despite an expected shorter detection window, and that the breath sampling procedure was well accepted and provided practical benefits reported both by the prison inmates and testing personnel.     

A screening radioimmunoassay for 1,4-benzodiazepines in human blood, serum, and urine using anti-oxazepam-hemisuccinate-antibodies (author's transl)]

A simple and specific radioimmunoassay (RIA) was developed for the determination of oxazepam and other 1,4-benzodiazepines in human blood serum and urine (e.g., diazepam, desmethyldiazepam, chlorazepate). For serum a 1:10 dilution, for urine a 1:100 dilution is recommended. Blood and hemolyzed samples need prior extraction by Amberlite XAD-2. The antisera were raised by immunizing "White New Zealand"-rabbits with an oxazepam-3-hemisuccinate bovine serum albumin conjugate. Using 0.1 ml serum dilution the sensitivity is 0.01 mg/l per tube. Especially higher concentrations show a tendency toward underestimation. Being not limited to a single 1,4-benzodiazepine derivative, the specificity of the antisera is also suitable for a screening analysis. Compared to thin-layer chromatographic analysis of urine this assay shows improved sensitivity (0.05--0.1 mg/l in 0.1 ml of a 1:100 dilution = 1 microliter of urine). For forensic investigations, an analysis in the sequence of urine-RIA, blood/serum-RIA, blood/serum-"electron-capture"-gas-liquid chromatography (ECD-GLC) seems to be a helpful approach. Blood levels of diazepam and desmethyldiazepam determined by RIA and GLC after extraction are in satisfactory agreement.     

三种安定类药物在中毒家兔体内的分布研究

为探求安定类药物在急性中毒家兔体内的代谢分布，采用固相萃取法和HPLC同时测定氯硝安定、佳静安定和安定。家兔按一定剂量将三种药物同时灌胃造成急性中毒2小时，处死后测定血、胆汁、尿液及其它脏器的三种药物浓度。结果表明，氯硝安定在胆汁和尿中含量较高，为0．82μg／ml和0．68μg／ml，而佳静安定及安定在胆汁和肝中浓度高，分别为9．32μg／ml和13．81μg／g。提示三种药物在家兔体内分布既有相同点也有显著差别。因此，利用本方法既可同时测定三种不同药物，也可为法医检案中毒案例的最佳检材采取和毒物分析结果评价提供了科学依据。     

A retrospective study of drugged driving in Norway

The National Institute of Forensic Toxicology, Oslo, receives blood and urine samples from all Norwegian drivers apprehended on suspicion of driving under the influence of alcohol or drugs. In 1983 we received samples from 1446 drug-suspected drivers, out of which 445 underwent toxicological analysis. The drugs found most frequently were tetrahydrocannabinol (THC) (n = 199), diazepam (n = 166) and amphetamine (n = 102). A cautious interpretation of the data indicate that about 200 of the 445 subjects selected for toxicological analysis drove under severe influence of drugs. Because of the high percentage of submitted cases not analysed for drugs, this figure represents a minimum estimate. Compared with the results from 1978, we found a several-fold increase in detections of THC and amphetamine in 1983. The number of diazepam detections did not increase in a similar way, but we estimated that the diazepam detections would have increased 3-fold if we had analysed as frequent for this drug in 1983 as in 1978.     

Fatal intoxication with melperone

Melperone is judged to be a safe neuroleptic drug. Until now there has been no report of a melperone fatality, though it has been used in suicide attempts. We report on a case of a 36-year-old woman where no cause of death could be established at autopsy. Criminological investigation pointed to a homicide by poisoning but also the possibility of a suicide had to be taken in account. The toxicological analysis of blood, cerebral spinal fluid and urine revealed extremely high concentrations of melperone which had never been reported before. Furthermore, diazepam, nordazepam and carbamazepine were detected. To our knowledge, this case is the first melperone fatality. Possible interactions with diazepam and carbamazepine are discussed.     

利用GC／MS分析尿中的安全分解产物

用气相色谱/质谱联用方法在一起死亡案中检验出安定的分解产物,并确定了分解产物的结构.     

尸体脏器中安定、利眠宁及其代谢降解产物的毛细柱GC/MS鉴定

本文描述了尸体脏器中安定、利眠宁及其代谢降解产物二苯甲酮类、N-去甲安定、舒宁和脱氧利眠宁的毛细柱GC/MS鉴定方法,讨论了热解和代谢过程。     

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。     

Rapid extraction of oxazepam from greyhound urine for high performance liquid chromatography analysis

A rapid and efficient procedure is described for the extraction and analysis of oxazepam, the major urinary metabolite of diazepam in greyhounds. Urine was extracted by passing through a bonded silica column (Bond Elut) following enzyme hydrolysis. The adsorbed drug was eluted and then detected and measured by high performance liquid chromatography (HPLC). Recoveries were in excess of 85% at 50 ng/ml concentrations. Detection was possible up to 30 h after a single oral dose of diazepam (5 mg).     

Miniaturized sample preparation method for determination of amphetamines in urine

A simple and miniaturized sample preparation method for determination of amphetamines in urine was developed using on-column derivatization and gas chromatography-mass spectrometry (GC-MS). Urine was directly applied to the extraction column that was pre-packed with Extrelut and sodium carbonate. Amphetamine (AP) and methamphetamine (MA) in urine were adsorbed on the surface of Extrelut. AP and MA were then converted to a free base and derivatized to N-propoxycarbonyl derivatives using propylchloroformate on the column. Pentadeuterated MA was used as an internal standard. The recoveries of AP and MA from urine were 100 and 102%, respectively. The calibration curves showed linearity in the range of 0.50-50 microg/mL for AP and MA in urine. When urine samples containing two different concentrations (0.50 and 5.0 microg/mL) of AP and MA were determined, the intra-day and inter-day coefficients of variation were 1.4-7.7%. This method was applied to 14 medico-legal cases of MA intoxication. The results were compared and a good agreement was obtained with a HPLC method.