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目的建立了血、尿等生物检材中海洛因代谢产物吗啡的定性分析方法。方法以丙酸酐为衍生化剂,采用微波衍生化技术结合GC/MS/MS进行分析。结果当CID电压为0.9V时,衍生化物的母离子与子离子碎片信息丰富,碎片为m/e268、324、342。结论此方法科学、准确,灵敏度高,能满足吸食海洛因类、吗啡类毒品人员的生物检材的检验要求。 相似文献
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本文对应用衍生化-气相色谱技术检测体液中吗啡、可待因和可卡因及其代谢物苯甲酰爱冈宁的研究及其进展进行了综述。为解决吸毒者血液和尿液等体液中有关毒品及其代谢物的微量分析提供了一种先进、可靠和灵敏的检测技术。 相似文献
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将松下牌微波炉(microwave oven,MWO)应用于20例人体尸检材料(心、脑)的链霉菌素一生物素免疫组化染色(LSAB法),检测了10种心、脑组织抗原.MWO应用于尸检材料免疫组化染色时的使用要点为(1)抗原的修复:切片置于0.01M枸椽酸盐缓冲液(PH6.0)中,DEF档(210W),10min,温度92-98℃;(2)滴加正常血清、一抗、二抗及SP复合物后,于LOW档(70W),5min,温度20~37℃,其它步骤与标准方法一致.结果表明:MWO的应用有助于封闭抗原的修复,提高阳性染色程度,降低背景着色,缩短染色时间. 相似文献
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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 相似文献
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血,尿中甲基苯丙胺以及代谢产物苯丙胺的分析研究 总被引:17,自引:1,他引:17
介绍了血、尿中甲基苯丙胺及其代谢产物苯丙胺的GC/MS,GC/FID和GC/NPD的定性定量分析方法.样品以4-苯基丁胺为内标,用200μl环己烷直接提取进样或提出物经微波照射快速衍生化后分析.方法简便、快速,回收率高于80%.检出限为2~5ng/ml.建立了体内甲基苯丙胶和苯丙胺的d/l光学对映体测定方法,可用于判断毒品来源及毒作用. 相似文献
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随着社会的进步和发展,人们的生活方式发生着深刻的变化。城市的交通拥挤便是这种变化引起的现象之一。城市由于交通设施的增加造成的交通拥挤甚至混乱给人们的生活带来极大的不便,这种不便迫使人们去寻找高技术的有效手段去解决这种不便。智能化的停车场就是顺应这一时代需求的高技术产物。这不仅可以有效地解决乱停乱放造成的交通混乱,而且可以促进交通设施的正规化建设,同时也尽可能地减少车主失车被盗的忧虑。 相似文献
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微波消解-扫描电镜联用法在溺死诊断中的应用 总被引:1,自引:1,他引:0
目的探讨微波消解-扫描电镜联用法在溺死诊断中的应用价值。方法收集已知死因的尸体标本105例,其中水中尸体85例(生前溺死70例,死后抛尸入水15例),陆地自然死亡尸体20例。水中死亡案例同时收集落水处水样。分别用微波消解-扫描电镜联用法(方法 A)和硝酸破机-光镜联用法(方法 B)对上述尸体的离体肺、肝、肾、骨髓组织及水样进行硅藻定性、定量检测。结果①溺死尸体的肺、肝、肾、骨髓中及落水处水样硅藻检出率:A法分别为100%、94.3%、92.9%、82.9%、100%,硅藻检验阳性率为100%;B法分别为90%、62.9%、51.4%、28.6%、92.9%,硅藻检验阳性率为65.7%。②两种方法检出的硅藻种类与落水处水样中硅藻的种类均一致。③两种方法在死后入水尸体离体的肺中也检出少量硅藻(<3个/2g肺组织),但在死后入水尸体的其它脏器及陆地自然死亡尸体脏器中均未检出硅藻。结论微波消解-扫描电镜联用法较硝酸破机-光镜联用法对尸体离体组织脏器中的硅藻检出率高,方法灵敏,定性准确。 相似文献
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The application of ultraviolet irradiation to exogenous sources of DNA in plasticware and water for the amplification of low copy number DNA 总被引:2,自引:0,他引:2
Using high sensitivity forensic STR polymerase chain reaction (PCR) typing procedures, we have found low concentrations of DNA contamination in plasticware and water assumed to be sterile, which is not detected by standard DNA procedures. One technique commonly used to eliminate the presence of DNA is ultraviolet (UV) irradiation; we optimized such a protocol used in the treatment of water, tubes, plates, and tips for low copy number DNA (LCN) amplification. UV light from a Stratalinker((R)) 2400 was administered to 0.2, 1.5 mL tubes, and PCR plates contaminated with up to 500 pg of DNA. They were subsequently quantified with an ALU-based real-time PCR method using the Rotorgene 3000. Overall, there was a decrease in concentration of DNA recovered as the duration of treatment increased. Nonetheless, following 45 min of irradiating a PCR plate with 500 pg of DNA, nearly 6 pg were still detected. However, when the plate was raised within an inch of the UV source, less than 0.2 pg of DNA was detected. Additionally, lining the area around the samples with aluminum foil further reduced the amount of time necessary for irradiation, as only 30 min eliminated the presence DNA in the raised PCR plate. Similar experiments were conducted using tubes filled with a solution of DNA and water in equivalent concentrations for 50, 15, and 1.5 mL tubes with comparative results. It is plausible that the aluminum foil increased the amount of reflection in the area thereby enhancing penetration of UV rays through the walls of the plasticware. This protocol was tested for the possibility of inhibitors produced from irradiation of plastic tubes. As our protocols require less irradiation time than previous studies, PCR sensitivity was not affected. Moreover, the lifespan of the UV lamps was extended. Our findings demonstrate that this method is useful as an additional precautionary measure to prevent amplification of extraneous DNA from plasticware and water without compromising the sensitivity of LCN DNA amplifications. 相似文献
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目的建立快速筛选检测中毒者血液、尿液中吗啡、甲基苯丙胺、苯丙胺、麻黄碱、3,4-亚甲基双氧甲基苯丙胺(MDMA)、3,4-亚甲基双氧苯丙胺(MDA)、氯胺酮并定量分析的方法;方法采用超高效液相色谱(UP—LC)-二极管阵列检测器(PAD);结果峰面积和质量浓度的线性关系良好,分离效果好、速度快、灵敏度提高;结论该方法与传统的HPLC相比能够更好满足实际办案中吗啡、甲基苯丙胺、苯丙胺、麻黄碱、MDMA、MDA、氯胺酮等中毒者血液、尿液的筛选检测并定量分析。 相似文献
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The current clandestine methodology for the manufacture of illicit cocaine hydrochloride utilizes microwave heating in order to dry the finished product. This study addresses the effects this step has on the occluded solvents present in newly prepared cocaine hydrochloride. Nine 1-kilogram-sized batches of cocaine hydrochloride were prepared from cocaine base using a variety of solvents or solvent mixtures commonly utilized in clandestine laboratories, pressed into bricks, and submitted to microwave heating. Residual solvents were qualitatively and quantitatively monitored before, during, and following the microwaving step by static headspace-gas chromatography-mass spectrometry. All solvents used in the conversion process were easily detected in the bricks even after extensive irradiation, confirming that occluded solvents are extremely resistant to removal by microwave heating. Qualitative and quantitative data corresponding to the residual solvents in the prepared cocaine hydrochloride bricks are presented. 相似文献
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《Forensic science international》1996,81(1):51-59
Microwave irradiation is used as an alternative heating method for extraction over more conventional hot plate methods. We describe a fast, efficient method for the determination of selected drugs in human blood/serum using microwave extraction. The microwave extraction of organic substances requires special instrumentation and the results have been compared with the results from classical liquid/liquid extraction. The present microwave extractions were performed in an ‘atmospheric pressure’ system. Before irradiation with microwaves, an appropriate solvent mixture was added to the buffered specimen. Lidocaine, methadone, diazepam, nordiazepam, propoxyphene and norpropoxyphene were tested as model substances. The quantitation was performed by GC/NPD. The procedure has been applied successfully to a number of forensic cases. The use of microwaves decreases the time of extraction and the solvent consumption. 相似文献