GC/MS和GC法定性定量分析可卡因

目的建立用于可卡因案件检验鉴定的GC和GC/MS定性、定量分析方法。方法通过选择和优化,建立GC、GC/MS法检验可卡因的最佳分析条件;用分别含0.6mg/ml地西泮为内标的0.10、0.20、0.40、0.60、0.80、1.00、1.20mg/ml可卡因标准品乙醇液,考察线性范围和方法检测限。结果分析方法线性方程:GC/FID,Y=1.055X-0.0021,R2=0.9999,GC/NPD,Y=0.556X-0.0016,R2=0.9996;可卡因检测限:GC/FID法10ng,GC/NPD法2ng;分别以所建GC/FID、GC/NPD分析方法和内标法对案件中缴获的可卡因毒品进行定量分析,结果为72%±2.3%,且两方法定量重现性良好。结论本文所建方法可以用于可卡因涉毒案件的检验鉴定。     

生物试样中巴比妥类药物固相提取柱上衍生化GC/MS分析

建立生物试样中常见巴比妥类药物的固相提取和柱上衍生化GC／MS分析法。将预制的血或肝分别在pH6．0和pH2.2的条件下过预活化的GDX－403吸附小柱，再用缓冲浪和蒸馏水各4ml顺序洗柱。最后用4ml丙酮／氯仿（1：1）溶剂洗脱样品，离心弃除水相，80℃挥至近干，用50μl乙醇定溶、取净化的样品2～4μl挥至近干，加20μl0．2molTMAH衍生化试剂，直接进样0.5μl，柱上衍生化GC／MS（GC）分析。在试验条件下，当血和肝分别添加2．0μg和5．0μg混合药物，回收率≥80％，相对标准差（RSD）优于±10％，检测限优于5ng（信／噪比≥2）。该法能有效地排除类脂物和组胺的干扰，可用于治疗量级药物分析和婴幼儿中毒案检验。     

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。     

毒品“麻古”的提取与GC／MS检验

目的建立毒品“麻古”的检测方法。方法利用不同前处理方法对毒品“麻古”进行定性分析。结果在碱性条件下可提高毒品“麻古”的提取率。结论该方法可以对毒品“麻古”进行准确定性。     

So far away from me? The effect of geographical distance on representation

Legislators face numerous trade-offs with regard to how to spend their time. One factor is, however, beyond their control: the distance between their constituency and the legislature. A more distant constituency implies increased travel, which decreases the time available for activities within the legislature itself, while also raising the possibility of centre–periphery dynamics in representation. Previous work has found that as distance between constituency and legislature increases, so does constituency focus, but it has not established why this is. This article explores the impact of geographical remoteness on representational activity, analysing a dataset of parliamentary activity in the British House of Commons (2005–2015), showing that the more remote an MP’s constituency, the less likely that MP is to attend votes, while being more likely to sign Early Day Motions. The article further shows that this is most likely driven by a centre–periphery dynamic rather than simply being a response to longer travel time.     

Simple and simultaneous quantification of cyanide,ethanol, and 1-propanol in blood by headspace GC–MS/NPD with Deans switch dual detector system

Cyanide is a powerful and rapidly acting poison. In Japan, cyanide poisoning is rare, and regular cyanide testing can be costly and time consuming. In contrast, alcohol analysis is routinely performed in most forensic laboratories. In this study, we attempted to develop a method for the simultaneous quantification of cyanide and alcohols in blood using headspace gas chromatography (HS–GC). As nitrogen-phosphorus detection (NPD) is more sensitive to hydrogen cyanide than mass spectrometry (MS), a Deans switch was used to switch the detectors during a single run. The separation provided by three analytical columns, PoraBOND Q, CP-Sil 5 CB, and HP-INNOWax, was investigated, and PoraBOND Q was selected. The use of HS–GC–MS/NPD with a Deans switch enabled the simple and simultaneous quantification of cyanide, ethanol, and 1-propanol. Eighteen other volatile compounds were detected in the SIM/scan mode of the MS.     

2例收缴“麻果”中主要成分的检验报道

1案例简介 案例1 2005年10月，新疆乌市公安局刑侦支队缉毒民警在乌市利华酒店大厅抓获犯罪嫌疑人路某某，在其随身携带的褐色夹包内缴获“麻果”药片20粒。药片均为圆型，片剂，黄连素药片大小，呈玫瑰红、浅桔红、深桔红或苹果绿，上面印有“R”、“WY”、“66”、“888”等标记，外观与摇头丸相似。     

GC／MS法检验杀扑磷

杀扑磷(methidathion),又名甲噻硫磷,灭达松,商品名称:速扑杀(Supracide),化学名称:5-2,3一二氢-5-甲氧基-2-氧代-1,3,4-硫二氮卓()-3基甲基O,O-二甲基二硫代磷酸酯,分子式:C6H11N2O4PS3,分子量:302,结构式见图1。理化性质:纯品为无色结晶,20℃时比重1.495,熔点39℃～40℃,蒸气压186.6×10-6Pa,20℃时溶解度水中250mg/L,丙酮中690g/L,乙醇中260g/L,环已酮中850g/L,二甲苯中600g/L。制剂由有效成分和稳定剂、乳化剂、溶剂及染料组成,外观为深蓝色液体,比重1.04～1.08,闪点24℃～28℃。据中国农药毒性分级标准,杀扑磷是一种广谱、高毒的…     

The European Union in Sudan: A Missed Opportunity?

Abstract

International organisations active in Africa are often criticised for their ineffectiveness. So too is the European Union (EU), which is also accused of failing to assume a more prominent conflict management role in war-torn countries. This article examines the EU’s capacity and readiness to take on such a role in one such country, the former Republic of Sudan, home to Africa’s longest-running civil wars and the first ‘genocide’ of the 21st century. It begins by outlining the EU’s record in Darfur and the North–South Peace Process. Drawing upon 25 interviews and Hill’s ‘capabilities–expectations model’, it then questions whether the EU’s ‘capabilities’ (resources, instruments, unity) were ‘fit for purpose’ in Sudan’s hostile target setting. It concludes by identifying settings that have been more propitious for a conflict-related management function and by suggesting that the EU should better manage expectations about future security roles.     

GC/MS/MS时间编程在火灾现场助燃剂检测中的应用

运用Varian SATURN2000气质联用仪通过GC/MS、GC/MS/MS、时间编程 GC/MS/MS对汽油样品进行分析比对,发现利用时间编程GC/MS/MS,对检测火灾现场残留汽油效果很好,可彻底排除样品中基体的背景干扰,大大提高检测灵敏度;同时对混合助燃剂（汽油+煤油、汽油+柴油）进行了实验探索。