苯并二氮类药物及其主要代谢物的薄层色谱分析

目的建立饮料、血、尿中 11种常见苯并二氮类药物及尿中 7种主要代谢物的薄层色谱分析法(HPTLC)。方法分析物采用GDX10 1树脂进行固相萃取 ,乙醚作为洗脱溶剂。苯 :丙酮 (10∶6)等作为展开体系 ,改良碘化铋钾显色。结果所建方法绝对灵敏度 0 3～ 0 6μg,尿检出限 0 4～ 1 0 μg/ml、血检出限 0 6～ 1 0 μg/ml、饮料检出限 0 4～ 0 8μg/ml。结论HPTLC法简便、快速 ,适合作为常规毒物分析方法     

一种利用红外对射光电感烟探测器测量烟气层界面高度的思路

烟气层界面高度是火灾试验中一个重要的测量参数,在大型现场火灾试验中,传统的温度判别法具有很大的局限性和缺点;本论文提出了一种采用红外对射光强衰减的方法来确定烟气层界面的高度,为大型现场火灾试验中的烟气层高度测量提供了一种更好的选择。     

Characterization and dating of blue ballpoint pen inks using principal component analysis of UV-Vis absorption spectra, IR spectroscopy, and HPTLC

The ink of pens and ink extracted from lines on white photocopier paper of 10 blue ballpoint pens were subjected to ultraviolet-visible (UV-Vis) spectroscopy, infrared (IR), and high-performance thin-layer liquid chromatography (HPTLC). The R(f) values and color tones of the bands separated by thin-layer chromatography (TLC) analysis used to classify the writing inks into three groups. The principal component analysis (PCA) investigates the pen responsible for a piece of writing, and how time affects spectroscopy of written ink. PCA can differentiate between pen ink and ink line indicates the influence of solvent extraction process on the results. The PCA loadings are useful in individualization of a questioned ink from a database. The PCA of ink lines extracted at different times can be used to estimate the time at which a questioned document was written. The results proved that the UV-Vis spectra are effective tool to separate blue ballpoint pen ink in most cases rather than IR and HPTLC.     

薄层色谱法鉴别黑色中性笔色痕的种类

黑色中性笔墨水主要由溶剂、色料、增稠剂、稳定剂和其他添加剂等组成,不同厂家或同厂家不同牌号中性笔墨水的成分不同,尤其是色料差别较大,这为中性笔墨水的种类鉴别提供了依据。本文利用数理统计中的均匀设计法和正交设计法安排试验,建立了一种可用于黑色中性笔色痕种类鉴别的方法:用N,N-二甲基甲酰胺作为黑色中性笔色痕的提取剂,四氢呋喃:甲醇:1,2-二氯乙烷:氯仿=30:15:5:7为展开剂的薄层色谱分析法。     

城镇化背景下农村环境保护法律问题探究

农村城镇化,是我国新农村建设推进的必然趋势,它缩小了城乡差距,带动了我国农村的经济发展,同时也对我国农村环境保护提出了新的挑战。理性对待农村城镇化和农村环境治理,树立农村环保法治理念,考察农村环境法律保护之现状,深入分析农村环境法律保护的问题之所在,从而探究切合我国农村城镇化发展的法律制度安排,具有积极的现实意义,也即本文意旨之所在。     

用SEM观察真皮浅层微小刺伤的研究

本文报道了一种用酶水解表皮与真皮的连接,然后用扫描电镜观察微小损伤在真皮乳头层的损伤特点的新方法。研究结果表明,这种方法有利于微小刺伤的鉴定,并提供一些具体的鉴定指标。     

循环经济评价体系探讨

循环经济发展系统是一个由生态环境、经济、社会等子系统组成的复杂大系统。它不是单个系统或要素的“增长,”而是多系统或要素在协调这一有益的约束和规定之下的综合发展。因此,对区域循环经济的发展状况进行评价是发展循环经济的一个必要步骤,既是对以前发展的一个总结,也为循环经济以后的发展重点及方向提供了科学的依据。     

The Analysis of Colored Acrylic,Cotton, and Wool Textile Fibers Using Micro‐Raman Spectroscopy. Part 2: Comparison with the Traditional Methods of Fiber Examination

In the second part of this survey, the ability of micro‐Raman spectroscopy to discriminate 180 fiber samples of blue, black, and red cottons, wools, and acrylics was compared to that gathered with the traditional methods for the examination of textile fibers in a forensic context (including light microscopy methods, UV‐vis microspectrophotometry and thin‐layer chromatography). This study shows that the Raman technique plays a complementary and useful role to obtain further discriminations after the application of light microscopy methods and UV‐vis microspectrophotometry and assure the nondestructive nature of the analytical sequence. These additional discriminations were observed despite the lower discriminating powers of Raman data considered individually, compared to those of light microscopy and UV‐vis MSP. This study also confirms that an instrument equipped with several laser lines is necessary for an efficient use as applied to the examination of textile fibers in a forensic setting.     

杏花药材质量控制

目的 建立杏花药材的质量控制方法。方法 以绿原酸、芦丁为对照品,建立薄层色谱以鉴别药材。采用紫外波长转换检测的高效液相色谱法同时测定药材中阿魏酸、芦丁及异槲皮苷的含量,色谱柱为YMC-Pack ODS-A C18柱（250 mm×4.6 mm,5 μm）,流动相为甲醇-乙腈-0.1%磷酸溶液（125∶105∶770）;阿魏酸的检测波长为322 nm（0～25 min）,芦丁与异槲皮苷的检测波长为255 nm（25～70 min）;流速：1.0 mL/min;柱温：30 ℃。结果 薄层色谱中斑点清晰;阿魏酸、芦丁及异槲皮苷分别在1.452 2～14.521 7 μg/mL（r=0.998 9）、27.366 7～273.666 8 μg/mL（r=0.997 2）、1.649 9～16.499 0 μg/mL（r=0.999 6）范围内线性关系良好,平均加样回收率分别为99.86%、99.70%、100.03%;RSD分别为0.9%、0.8%、1.2%。结论 所用方法准确、稳定、可行,可用于杏花药材的质量控制。     

黄枳胶囊质量控制方法研究

目的建立黄枳胶囊质量控制的方法。方法采用薄层色谱法（thin layer chromatography，TLC）对方中大黄、火麻仁、枳实和白芍进行定性研究；并采用TLC法测定大黄素含量。结果大黄素在0．0400．200μg范围内与峰面积呈良好的线性关系，r=0．99917，平均回收率为98．29％，RSD=0．47%。结论TLC法简便、专属性强，可准确测定黄枳胶囊中大黄素含量。