SPE-HPLC/MS/MS检验体液中赛拉嗪及DMA

目的建立了一种高效液相色谱串联三重四极杆质谱同时测定体液中赛拉嗪及2,6-二甲基苯胺的分析方法。方法样品经HLB固相萃取柱提取净化,Waters Atlantis d C18色谱柱分离,正电离条件下进行选择监视扫描模式检测。结果方法的回收率为70.5%~79.8%,RSD为8.2%~10.5%。赛拉嗪及2,6-二甲基苯胺在血液和尿液中的检出限分别为0.4 ng/mL和0.3 ng/mL,定量限分别为1.2 ng/mL和1.0 ng/mL。结论本方法灵敏度高、特异性好、重现性好,适用于赛拉嗪中毒的血液和尿液检测。     

GC／MS同时分析头发中大麻酚类和△^9-四氢大麻酸

目的建立同时分析毛发中THC、CBN、CBD和大麻主要代谢物THC-COOH的方法.方法头发检材去污处理后,加入内标氯灭酸,经NaOH水解和正己烷:乙酸乙酯(9:1)提取,吹干后衍生化,利用GC/MS-SIM方法分析.结果THC、CBN和THC-COOH的最低检出限分别为0.01、0.05和0.01ng/mg.10例阳性头发中均检出THC成分,THC浓度范围为0J 1～8.84ng/mg,有3例未检出THC-COOH,检出者的量亦低于定量下限.结论同时分析头发中的大麻酚类和△9-四氢大麻酚是可行的,头发中THC-COOH浓度明显都低于THC浓度.     

顶空固相微萃取气相色谱法快速检测尿液中氯胺酮

目的建立快速检测吸毒人员尿液中氯胺酮的顶空固相微萃取(HS/SPME)-GC/NPD的方法。方法样品瓶中加入尿液、氢氧化钠溶液、氯化钠,在95℃下加热搅拌,用聚二甲基硅氧烷SPME萃取头(100μm)顶空萃取20min,气相色谱氮磷检测器检测,外标法定量。结果尿液中氯胺酮浓度在0.2~20.0μg/ml范围内呈现线性关系(r2=0.9965),尿液添加1.0μg氯胺酮,平均回收率102.6%,RSD=3.39%(n=7),检测限1.13ng/ml(S/N=3)。结论建立的方法简单、快速、灵敏、准确,十分适合尿液等生物检材中氯胺酮的快速定性定量分析。     

Simultaneous analysis of six amphetamines and analogues in hair, blood and urine by LC-ESI-MS/MS: Application to the determination of MDMA after low Ecstasy intake

A rapid and sensitive method using LC-MS/MS triple stage quadrupole for the determination of traces of amphetamine (AP), methamphetamine (MA), 3,4-methylenedioxyamphetamine (MDA), 3,4-methylenedioxymethamphetamine (MDMA, “ecstasy”), 3,4-methylenedioxyethamphetamine (MDEA), and N-methyl-1-(3,4-methylenedioxyphenyl)-2-butanamine (MBDB) in hair, blood and urine has been developed and validated. Chromatography was carried out on an Uptisphere ODB C₁₈ 5 μm, 2.1 mm × 150 mm column (Interchim, France) with a gradient of acetonitrile and formate 2 mM pH 3.0 buffer. Urine and blood were extracted with Toxitube A^® (Varian, France). Segmented scalp hair was treated by incubation 15 min at 80 °C in NaOH 1 M before liquid–liquid extraction with hexane/ethyl acetate (2/1, v/v). The limits of quantification (LOQ) in blood and urine were at 0.1 ng/mL for all analytes. In hair, LOQ was <5 pg/mg for MA, MDMA, MDEA and MBDB, at 14.7 pg/mg for AP and 15.7 pg/mg for MDA. Calibration curves were linear in the range 0.1–50 ng/mL in blood and urine; in the range 5–500 pg/mg for MA, MDMA, MDEA and MBDB, and 20–500 pg/mg for AP and MDA. Inter-day precisions were <13% for all analytes in all matrices. Accuracy was <20% in blood and urine at 1 and 50 ng/mL and <10% in hair at 20 and 250 pg/mg. This method was applied to the determination of MDMA in a forensic case of single administration of ecstasy to a 16-year-old female without her knowledge during a party. She suffered from hyperactivity, sweating and agitation. A first sample of urine was collected a few hours after (T + 12 h) and tested positive to amphetamines by immunoassay by a clinical laboratory. Blood and urine were sampled for forensic purposes at day 8 (D + 8) and scalp hair at day 60 (D + 60). No MDMA was detected in blood, but urine and hair were tested positive, respectively at 0.42 ng/mL and at 22 pg/mg in hair only in the segment corresponding to the period of the offence, while no MDA was detectable. This method allows the detection of MDMA up to 8 days in urine after single intake.     

The law and the sublime: Rethinking the self and its boundaries

Christine Battersby has argued that it is Kant (and not Descartes) who provides the paradigm model of what it is to be a self in modernity. The Kantian self is established in opposition to its other. The body is commonly envisaged as a container, with selfhood as something that is defended against the outside. In contrast, she proposes a feminist reworking of such a model of selfhood, applicable to both men and women, in which the self and other emerge over time through patterns of relationality. This paper introduces Battersby’s work by focusing upon her early analysis of Kantian aesthetics, in particular the sublime. The aim is to draw out some of the legal and political implications of her work, particularly with regard to the common law’s developing conception of privacy. This is carried out by distinguishing her ontological position from the psychology of Carol Gilligan and then by considering the overlapping concerns of Jennifer Nedelsky in the area of legal theory.

英国法院对中国《海商法》和《对外贸易法》的适用和评价

通过介绍两个与中国法律或中国法院判决有关的案例,对中国法在外国的适用以及外国法院尤其是英国法院如何看待中国法院的判决进行了介绍和评析。     

尿中氯胺酮及其代谢物检测的研究

目的建立氯胺酮滥用者尿中氯胺酮及其代谢物检测方法。方法尿液用有机溶剂液-液萃取,气相色谱/氮磷检测器、电子捕获检测器、氢火焰检测器和气-质联用仪测定。结果确认了尿液中氯胺酮的主要代谢物,尿液中氯胺酮及去甲氯胺酮的最小检测限均为2ng/mL,脱氢去甲氯胺酮的最小检测限为5ng/mL。结论所建方法快速、灵敏、准确,能够满足氯胺酮滥用者尿液检测的需要。     

分子印迹固相萃取法在血中苯丙胺类毒品分析中的应用

目的建立分子印迹固相萃取（MISPE）、GC/MS分析方法,用于血液中苯丙胺类毒品检测。方法 10mmol/L醋酸铵缓冲液（pH8.0）4倍稀释空白添加血液,1mL甲醇,1mL10mmol/L醋酸铵缓冲液（pH8.0）活化苯丙胺类分子印迹固相萃取柱;2×1mL去离子水、1mL60%的乙腈去离子水、1mL1%醋酸乙腈洗涤杂质;2×1mL1%甲酸/甲醇洗脱,洗脱液挥干定容,经GC/NPD、GC/MS分析检测。结果各种苯丙胺类毒品回收率均在90%以上,在20～5 000ng/mL浓度范围内线性关系良好,r2为0.995 7～0.998 9,LOQ在16～30ng/mL之间,LOD在8～15ng/mL之间。结论本方法回收率高,净化效果显著,稳定性好,杂质干扰少,可用于血液中低浓度苯丙胺类毒品的分析检测。     

杨梅素混合胶束的研制及其体外表征研究

目的 研制载有杨梅素（myricetin,Myr）的聚乙二醇-聚乳酸（polyethylene glycol-polylactic acid, mPEG-PLA）/Pluronic F68混合胶束（mixed micelles,MMs),并对Myr-MMs进行表征及体外释放研究。方法 通过丙酮溶剂挥发法研制Myr-MMs,以单因素及L9(34)正交实验优化处方及其工艺;并对制得的载药MMs的粒径、Zeta电位、外观形态、包封率、载药量和体外释放进行研究。结果 最优处方制得的Myr-MMs的包封率为（84.65±0.98）%、载药量为（2.73±0.03）%;透射电镜下观察Myr-MMs呈球形或类球形、表面光滑、无粘连;粒径为（41.74±0.27）nm,多分散系数为0.115±0.004;Zeta电位为（－25.47±1.22）mV;体外释放研究发现,MMs体外释药过程近似符合Weibull释药模型：ln(ln(1/(1－Q/100)))=0.927 1lnt－2.057 6（r=0.953 8）。结论 利用丙酮溶剂挥发法成功研制了Myr-MMs,其成型好、粒径小、分布均匀,包封率和载药量均较高;且Myr经mPEG-PLA/Pluronic F68 包裹后其体外释放显示出一定的缓释效果。     

木丹颗粒对高糖环境下人血管内皮细胞Nrf2/ARE信号通路的影响

目的 探讨木丹颗粒对高糖环境下人血管内皮细胞核转录因子E2相关因子2（neclear factor erythroid 2-related factor 2,Nrf2）/抗氧化反应元件（antioxidant response element,ARE）信号通路及血管内皮生长因子（vascular endothelial growth factor,VEGF）的影响。方法 将健康雄性Wistar大鼠30只随机分为正常组、模型组、木丹颗粒组,每组10只,制备含药血清;将正常组含药血清加入正常糖浓度培养内皮细胞,模型组及木丹颗粒组分别加入高糖培养内皮细胞;采用RT-PCR、Western blot分别检测Nrf2、血红素氧合酶-1(heme oxygenase-1, HO-1)的mRNA及蛋白表达水平;采用ELISA法检测各组细胞上清液中VEGF含量。结果 与正常组比较,模型组Nrf2、HO-1的mRNA及蛋白表达均显著上调（P<0.05）,VEGF的含量显著增加（P<0.05）;与模型组比较,给药组Nrf2、HO-1的mRNA及蛋白表达水平均显著上调（P<0.05）,VEGF的含量显著减少（P<0.05）。结论 〖JP2〗木丹颗粒对高糖环境下人血管内皮细胞的保护作用机制可能与上调Nrf2/ARE信号通路的表达、降低VEGF含量有关。