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。     

亚甲基双氧甲基苯丙胺中毒检验方法的研究

详细讨论了亚甲基双氧甲基苯丙胺中毒后生物体内的提取、净化和检验方法,得出了生物体内亚甲基双氧甲基苯丙胺的提取最佳条件,净化方法和GC/FID定量分析方法,为类似毒品中毒的体内定性定量检验提供了参考.     

GC／MS检测尿中4种苯氧羧酸类除草剂

目的建立尿中2，4-D、2，4-DP、MCPA、MCPP等4种苯氧羧酸类除草剂的分析方法；方法液液提取分离，乙醚为提取液，DCPA为内标，硫酸正丁醇酯化衍生化，气质联用分析法分析；结果尿中4种除草剂添加样品的相对回收率在80％以上，检测限都在5ng／ml以下，对中毒兔尿样进行了分析；结论对实际发生的中毒案件分析有足够的灵敏度。     

A comparison of three automated DNA purification methods in Forensic casework

Manual Chelex^®-100 and organic extractions (phenol/chloroform) are used as routine methods at the Swedish National Laboratory of Forensic Science, SKL. The aim of this study was to find an automated DNA purification system to replace the organic method. The following methods were evaluated and compared to each other and to the organic method used routinely; BioRobot^® EZ1 with EZ1 DNA Investigator Kit and Card (Qiagen), iPrep™ Purification Instrument with iPrep™ ChargeSwitch^® Forensic Kit and Card (Invitrogen), Magnatrix™ 1200 Workstation with the Magnatrix™ gDNA Blood Kit Forensic and two different protocols; Forensic protocol A and B (Magnetic Biosolutions). Blood on fats, cotton swabs, moist snuff, paper towels and leather, post-mortem blood and muscle tissue were extracted with the different methods. DNA concentration and quality of the electropherograms were examined. Individual comparisons between the four extraction methods showed that iPrep™ and Magnatrix™ 1200 gave significantly lower mean quantities compared to BioRobot^® EZ1 and the organic extraction method (p < 0.05). There were no significant differences between the latter two. BioRobot^® EZ1 generated the best results and is in the process of being validated for routine analysis at SKL.     

FTA-DNA直接提取法的研究与应用

目的建立一种简约且易于自动化操作的Whatman FTA卡血样DNA提取方法。方法取直径1．2mm FTA卡血样，分别用FTA-DNA直接提取法及FTA常规提取方法提取DNA，AB-Identifiler^TM试剂盒分别进行10山和25山体系检测比较，并筛选批量grA卡血样DNA自动化提取程序。结果200份grA卡血样分别采用2种方法提取DNA模板，25μl体系PCR-STR检测，分型结果均良好。10μl体系检测，FTA-DNA直接提取法优于FTA常规提取方法，图谱RFU值为1000～2000，采用自动化工作站运行该提取程序较手工操作DNA分型图谱均衡性更佳；采用FTA常规提取方法检测，图谱RFU值100～2000，小片段优先扩增现象明显，且有19％的样本出现丢峰现象，采用自动化工作站运行该程序对其结果改善不明显。经工作站运行FTA-DNA直接提取法自动程序及10山体系检测本2万余份FTA卡采集的血样，均获得16个STR基因座DNA分型结果。结论本文建立的FTA-DNA直接提取法适用于FTA卡血样自动化DNA建库。     

肝中对硫磷的固相萃取—电子捕获检测气相色谱分析法

目的建立肝中对硫磷的快速、灵敏、可靠的GC／ECD分析方法。方法肝匀浆加内标甲基对硫磷,用乙腈浸提,浸提液加6％高氯酸稀释,稀释的上清液用GDX403树脂进行固相提取,提取物用HP-5色谱柱和电子捕获检测器进行气相色谱分析。结果提取率92.3％,检测限7.8ng／g,线性范围0.04～4.0μg／g,回收率99.6％±6.2％(Mean±CV,n=5)。结论方法简便、灵敏适合于实际案件检验。     

用《论语》思想构建和谐采油院

《论语》的基本精神“仁、义、札、智、信”，不仅是伦理之道，而且也是经营管理之道。2007年是胜利油田的“和谐文化建设年”，胜利油田采油院把学《论语》引入到企业和谐文化建设中来。《论语》赋予采油院和谐文化建设新的生命力与形式。     

Examination of pretreatment methods for DNA extraction from nails

In the conventional method of DNA extraction from nails, it takes approximately half a day to dissolve the nails. In this study, we examined whether using the HOrizontal Nail MAshing (HONMA) method, in which pressure is applied to the nail to crush it flat and increase its surface area, would improve DNA extraction efficiency. Fingernails (5 mg) provided by ten volunteers were used as samples. Nail pieces (1–3 pieces), shredded with nail clippers, were thinly stretched by applying 2 t of pressure to each piece using a hydraulic press. DNA was extracted by incubation at 56 °C for 10 min and 1 h during proteolysis. DNA yield from the nails pretreated using the HONMA method increased by 0.20–7.10 times compared with that from unprocessed nails. In particular, 10-min incubation using the HONMA method resulted in an average 2.05-fold increase in DNA yield compared with that under overnight incubation. However, the impact of using the HONMA method varied widely among individuals, and the amount of extracted DNA decreased in some cases, suggesting that the yield may differ depending on the nail quality.