用Sep—Pak C18固相萃取柱快速提取净化氨基甲酸酯类农药

本文介绍了一种应用Sep—Pak C_(18)固相萃取柱从各类生物检材中快速提取净化9种氨基甲酸酯类农药的方法,并用大口径毛细管气相色谱进行分析。9种药物包括:速灭威、叶蝉散、灭多虫、灭除威、灭杀威、残杀威、巴沙、呋喃丹、西维因。萃取前,水基质检材用蒸馏水稀释;脏器检材加0.4N高氯酸溶液。用3ml氯仿/异丙醇(9:1)洗脱药物。水基质检材的回收率(尿、血浆、全血)在80—100％之间;脏器检材的回收率(肝、肾、脑)在66—100％之间。Sep—Pak C_(18)小柱用于尿和血浆样品时可反复使用。     

论苏北古代文化地理——先秦至唐

这里所说的文化,是广义的文化,即人类有史以来创造的物质和精神财富的总和。美国地理学家索尔(Carl Sauer)认为,文化地理学是研究人类创造的文化地域,美国人类学界的“新进化论”者怀特(L.A.White)也指出:“所有文化都是由三种根本成分组成的:即技术——经济成分、社会成分、意识形态因素,“这说明人类文化现象的规律性是和人类物质实践活动和精神发展紧密相联系的,并且某一区域的文化现象的规律性则又是连续     

韩国新湖商社与四川省欧亚经贸总公司等信用证欺诈纠纷管辖权异议案

上诉人(原审被告):韩国新湖商社。住所地:韩国大田广域市西区葛马洞309——3号。 法定代表人:李顺基,代表理事。 委托代理人:张耀军,北京市利德律师事务所律师。 被上诉人(原审原告):四川省欧亚经贸总公司。住所地:中华人民共和国四川省成都市红星路二段78号富钻大厦五楼。 法定代表人:黄新钰,该公司董事长。     

在Gc电泳图谱上读Hp表型

前言血型特异性成分(Gc)和结合珠蛋白(Hp)是两种血清球蛋白,分别具有三种遗传表型Gc1—1,Gc2-1,Gc 2—2,和Hp1-1,Hp2-1,Hp2-2,按孟德尔遗传定律遗传,是法医学个人识别及亲权鉴定的两个重要遗传标记。一般情况下,检测血清Gc和Hp需要分别配制凝胶、凝胶缓冲     

腐败生物样品中抗凝血类杀鼠药的HPLC分析研究

介绍以氯敌鼠、华法令为代表的五种抗凝血杀鼠药的HPLC定性定量分析方法.在酸性条件下液-液提取和C_(18)柱固相萃取方法处理生物样品;选用C_(18)分离柱,流动相分别为:水、乙腈,邻酸二氢钾缓冲液(pH7.0)和甲醇/0.8%醋酸,均做梯度洗脱,DAD检测器,检测波长285nm,外标定量,测得血和肝中的提取回收率>60%.在0.01ug-1.0mg/ml范围内呈现良好的线性关系.适用于腐败生物样品抗凝血类杀鼠药中毒案件的检验及有关临床监测.     

佐匹克隆快速检验

利用电喷雾液质联用法快速检验血中佐匹克隆。少量血液样品采用乙腈沉淀蛋白后直接取上清液进样,使用Allure PFP Propyl(5μm,100mm×2.1mm)柱,流动相:乙腈:10mmol/L乙酸铵-0.1%甲酸缓冲液=70:30进行分离,经电喷雾离子源正离子化后通过三重四级杆质谱多反应监测(MRM)对佐匹克隆(m/z 389.3/345.4和m/z 389.3/245.2)进行定性分析。被害人血中检出佐匹克隆成分。液质联用法检验血中佐匹克隆快速、准确、简单,可用于案件中检测血中佐匹克隆成分。     

注释体例

援用本刊规范:彭小瑜:“古代罗马宪法制度及其汉译问题”,《北大法律评论》第3卷第2辑(2000),第314—318页。一、一般体例1．引征应能体现所援用文献、资料等的信息特点,能与(1)其他文献、资料等相区别;(2)     

对判定构成变劣技术侵权的思考

一、案情及处理结果 原告某科技有限责任公司(以下简称原告)依法取得了“颅内血肿粉碎穿刺针”实用新型专利权。该专利权利要求1表述为:一种颅内血肿粉碎穿刺针,其特征在于:针体为中空管状,后端与一带顶孔螺帽相配合;血肿粉碎器为针管状,前端封闭,靠近端部沿内壁切线方向有一个以上微孔,尾部有—固定片。该项技术广泛应用于医学临床领域。之后,原告发现被告某医学技术研究所(以下简称被告)制造、销售了名为“微创硬通道颅内穿刺针”的产品,其技术方案为:1、一个中空管状针体,针体上装有侧管;2、一个带顶孔螺帽,可与针体的后端相拧合;3、一     

大麻毒品的检验方法

本文用改良的薄层色谱和气相色谱法对走私贩毒的大麻毒品进行定性、定量分析,两种方法均能完全分离出大麻的3种主要成分:大麻酚(CBN)、四氢大麻酚(THC)及大麻二酚(CBD),灵敏度:薄层法0.15μg,气相色谱法10ng     

华盛顿·欧文与《瑞普·凡·温克尔》

华盛顿·欧文(Washington Irviug,1783—1859)是美国建国初期的散文家、小说家和历史学家。他的文学和历史著作主要有:《纽约史》(1809)、《见闻札记》(1819—20)、《布雷斯勃列奇田庄》(1822)、《旅客谈》(1824)、《阿尔罕伯拉》(1832)、《克里斯托弗·哥伦布的生平与航行》(1828)、《征服格拉那达王国的编年史》(1829)、《阿斯特里亚》(1836)、《邦纳维尔船长历险记》(1837)、《奥利弗·哥德斯密斯传记》(1849)、《穆罕默德和他的继承者》(1850)、五卷本《乔治·华盛顿传记》(1855—59)。     

Analysis of biofluids for flunitrazepam and metabolites by electrospray liquid chromatography/mass spectrometry

A rapid and sensitive liquid chromatography/electrospray ionization mass spectrometry (LC/MS) procedure has been developed for the analysis of biofluids containing flunitrazepam and its metabolites. Specimens were spiked with deuterated analogs of the analytes. Urine specimens were enzymatically hydrolyzed and blood specimens were untreated. Extractions were carried out using CleanScreen DAU SPE cartridges. The drugs were separated on a C18 column using a methanol-water-ammonium hydroxide (60:40: 0.03 v/v) mobile phase. After determination of base peaks using full scan mass spectrometry, the mass spectrometry method was optimized to operate in selected-ion monitoring (SIM) mode for the base peak of each analyte. Positive findings were confirmed by LC/MS/MS using the same mobile phase and column. This analytical procedure allows for the detection of low levels of flunitrazepam and metabolites in biofluids. It is useful for ascertaining the role of flunitrazepam in cases of drug-facilitated sexual assault.     

Isolation and purification of heroin from heroin street samples by preparative high performance liquid chromatography

The present study established a novel method using preparative high performance liquid chromatography to isolate and purify heroin·HCl from heroin street samples to be used as a reference standard. Different kinds of mobile phases and columns were used, ultimately the mobile phase consisting of hexane-isopropanol-methanol (65:28:7, v/v) and the SIL preparative column prepared in laboratory were selected as the final condition. Heroin was further purified by the drowning-out crystallization method using isopropanol-methanol (50:1, v/v) and hexane as drowning-out anti-solvents and salting-out agents, respectively. The purity was assessed by analytical high performance liquid chromatography and the confirmation of the chemical structure was performed by IR and NMR. About 110.7mg of heroin·HCl at a purity of over 99.52% was obtained from 180mg of heroin street samples which contained 156.15mg of heroin·HCl component by preparative high performance liquid chromatography. This method is suitable for preparing heroin standards in forensic science area.     

尿液中几种碱性麻醉药物的检验

本文介绍了一种用 Sep-Pak C_(18)小柱,液-固萃取法提取尿液中几种碱性麻醉药物,以大口径毛细管气相色谱-氢火焰离子化检测器检验的方法。操作过程简单、迅速,各药物回收率高。     

生物检材中乌头碱的LC-MS/MS快速分析

目的应用高效液相色谱-质谱法对生物检材中乌头生物碱等有毒成分进行快速分析。方法取全血样品经乙腈-甲醇(5:1 v/v)提取,使用Agilent Zorbax SB C18(2.1 mm×50 mm,1.8μm)色谱柱,以0.1%甲酸溶液-乙腈(60:40 v/v)为流动相等度洗脱。在多反应监测模式下测定全血样品中乌头生物碱等有毒成分。结果乌头碱、次乌头碱和中乌头碱的保留时间为0.73 min、0.77 min和0.63 min;用于定量分析的离子对分别为m/z 646.4→586.4(乌头碱)、616.1→556.5(次乌头碱)和632.4→572.1(中乌头碱)。乌头碱在0.1~250 ng/m L内线性关系良好,相关系数(r)≥0.9987,最低检出限0.1ng/m L,精密度考查其变异系数(CV)5.42%(n=6),血液中乌头碱提取回收率不小于90%。结论本文建立的高效液相色谱-质谱法快速、简便、灵敏,适用于天然药毒物检验。     

Comparative analysis of gamma-hydroxybutyrate and gamma-hydroxyvalerate using GC/MS and HPLC

This paper describes two analytical techniques used to separate and quantify gamma-hydroxybutyrate (GHB) and gamma-hydroxyvalerate (GHV). The first technique was a N,O-bis(trimethylsilyl)triflouro-acetimide-trimethylchlorosilane derivatization, followed by gas chromatography/mass spectrometry analysis using an HP-5 capillary column at a rate of 1.0 mL/min with a run time of 9.25 min. This technique was found to be sensitive (LOD 1 pg on column) and gave a low average error (5%) in a beverage study. When supplemented by a surrogate spike, the method yielded 97% analyte recovery from beverages. The second technique was high-performance liquid chromatography/UV (HPLC/UV) using a C-18 column with a (20:80% v/v) methanol:dibasic phosphoric buffer (10 mM, pH 3) at a rate of 1.00 mL/min with a run time of 7.5 min. UV detection occurred at 254 nm. This method was found to be less sensitive (LOD 0.05 microg on column) for direct analysis of aqueous samples. To remove interferences seen in the beverage study, a liquid-liquid extraction before HPLC analysis was tested. However, a decreased sensitivity (LOD 100 microg on column) and irreproducible peak profiles resulted.     

LC-MS/MS-MRM筛选血液中22种有毒生物碱成分

目的建立液相色谱-串联质谱法对血液中的22种常见有毒生物碱成分进行筛选分析。方法血液以丁丙诺菲为内标经液液提取后,用液相色谱-串联质谱仪以电喷雾电离(ESI )、多反应监测(MRM)方式进行分析。结果以化合物的保留时间、两对母离子/子离子对定性,最低检出限为0.1～20ng/mL。结论该方法选择性佳、灵敏度高,适用于法医毒物分析和临床毒物分析中有毒生物碱的分析。     

The examination of illicit cocaine

A laboratory system of examination of illicit cocaine exhibits is described. Separation and identification of many of the components in exhibits are achieved by the use of capillary column gas chromatography and a Finnigan ion trap detector. Further examination and quantitation of the components of exhibits is achieved using two high performance liquid chromatographic (HPLC) systems. Both of these systems use identical reverse phase C8 columns. System 1 employs a solvent composed of 40% acetonitrile, 10% tetrahydrofuran and 50% 0.1% v/v aqueous triethylamine. The eluant is monitored at 280 nm. This system is preferred for routine quantitative analysis of cocaine and related alkaloids in exhibits. System 2 employs a solvent composed of 30% acetonitrile and 70% 0.05M phosphate buffer (pH = 5.0). The eluant from this system is monitored at both 220 and 280 nm. This system offers advantages in sensitivity. The relative retention times of a number of relevant substances as determined with gas chromatography and the two HPLC systems are given. The utility of the methodology for the identification and comparison of exhibits is demonstrated.     

UPLC/Q-TOF-MS 和 PLS-DA 在鸦片生物碱检测及分类判别中的应用

目的建立了鸦片中吗啡、可待因、蒂巴因、罂粟碱、那可汀5种常量生物碱和牛心果碱、劳丹宁、劳丹素等12种痕量生物碱同时分离鉴定的超高效液相色谱-高分辨四极杆飞行时间串联质谱（UPLC/Q-TOF）方法。方法采用Agilent Eclipse Plus C18RRHD（2.1 mm×100 mm,1.8μm）色谱柱,以10 mM甲酸铵溶液和乙腈体系梯度洗脱,使用ESI离子源,正离子模式下采集数据。结果借助UPLC的快速分离和Q-TOF-MS测定的精确分子量和二级碎片信息,实现了17种生物碱的检测。应用SIMCA-P软件对78份国产鸦片和200份缅甸产鸦片进行偏最小二乘法判别分析（partial least squaresdiscriminate analysis,PLS-DA）,比较不同地区鸦片样品中生物碱的差异,建立了区分国产鸦片和缅甸产鸦片的判别方法。结论所建立的方法用于鸦片样品中常量和痕量生物碱的检测及鸦片样品的产地判别,具有快速、高效、灵敏、准确的特点。     

A rapid and simplified extraction of haloperidol from plasma or serum with bond elut C18 cartridge for analysis by high performance liquid chromatography

This method for the determination of haloperidol (HAL) in plasma is based on high-performance liquid chromatography (HPLC) with a reversed-phase column, ODS-C18. HAL is rapidly extracted from human plasma by using Bond Elut C18 cartridge and its recovery is over 90%. The mobile phase is a mixture of 1% acetate/acetonitrile/tetrahydrofuran/triethylamine (69.5: 28.2:1.9:0.4, by vol.). The method is rapid, simple and free from intereferences and gives good precision.     

超声辅助固相萃取-HPLC法测定不同地区缴获鸦片样品中生物碱

目的本文建立了超声辅助固相萃取-HPLC法定量测定缴获鸦片样品中吗啡、可待因、蒂巴因、罂粟碱、那可汀5种生物碱并同时检出6种未知化合物的方法。采用主成分分析法区分不同地区缴获的鸦片样品。方法采用超声辅助固相萃取法提取生物碱,XDB-C18（5μm×4.6mm×250mm）色谱柱,流动相为10mM的1-庚烷磺酸钠（pH 3.2）和乙腈,梯度洗脱,紫外检测器检测。结果该方法的定量限为0.58~2.78 mg/kg。添加水平在0.2～1.5mg/mL范围内,平均加标回收率为81.0%～99.2%,相对标准偏差为1.6%～5.0%。结论本方法重现性好、定量准确,满足定量检测鸦片中生物碱含量并对不同产地鸦片进行分类的需要。