毛细管电泳法同时测定血浆中的美西律、利多卡因和布比卡因的浓度

采用毛细管电泳法同时测定血浆中关西律、利多卡因和布比卡因的浓度。取0．5mL血浆，用乙醚提取后吹干，重组后进样于毛细管电泳仪进行分离测定。电泳条件：分离用缓冲液为75mmol／L NaH2PO4溶液（pH3．0），温度30℃，运行电压26kV，紫外检测，波长200nm，压力进样5S。本法在0．1～4．0μg／mL范围内线性关系和精密度良好，方法回收率在96％～105％之间，检出限均为0．02μg／mL，可满足临床监测需要。     

高效液相色谱法测定珍菊降压片中氢氯噻嗪的含量

用高效液相色谱法测定珍菊降压片中氢氯噻嗪的含量。色谱柱为C18反相柱,流动相为甲醇-水溶液(甲醇与水的体积比为2：3),流速为0．5mL／min,检测波长为277nm。氢氯噻嗪的质量浓度在18．24～42．56μg/mL内与对应的色谱峰面积呈线性关系,测定结果的相对标准偏差为0．78％,氢氯噻嗪的回收率为99．93％。     

双波长分光光度法测定阿丙沙星可溶性粉中阿莫西林、盐酸环丙沙星的含量

应用双波长分光光度法测定阿丙沙星可溶性粉中阿莫西林、盐酸环丙沙星的含量。以pH=5．0的磷酸盐缓冲液为溶剂,在波长229、248、315、400nm处进行测定,阿莫西林的浓度在5．130～25．650μg／mL、盐酸环丙沙星的浓度在4．888～24．440μg／mL范围内分别与其吸光度差值呈良好的线性关系。阿莫西林的回收率为99．30％～100．19％,测定结果的相对标准偏差为0．60％～1．00％(n=5),盐酸环丙沙星的回收率为99．30％～99．86％,测定结果的相对标准偏差为0．84％～1．02％(n=5)。     

蒸馏分离-分光光度法测定枸杞子中的微量锗

利用盐酸与锗元素反应生成易挥发的四氯化锗，以蒸馏方法将四氯化锗分离出来，然后在1～1．5mol／L盐酸溶液中，用显色剂苯芴酮与四氯化锗进行显色反应生成橙红色配合物，在500nm波长处进行分光光度法测定。在0～200μg／(50mL)，线性方程为A=0．1714c．相关系数r=0．9996。该方法的检出限为0．0588μg／mL，测定结果的相对标；位偏差为2．24%～2．30%(n=11)，平均回收率为95．3％～95．4％。     

(R,S)-α-羟基苯丁酸乙酯的HPLC手性分离

建立了手性柱HPLC法测定盐酸贝那普利的中间体(R)-α-羟基苯丁酸乙酯中的(S)-α-羟基苯丁酸乙酯。采用Chiralcel OD-H色谱柱,流动相正己烷-异丙醇（体积比90：10),流速1．0mL／min,检测波长254nm,进样体积20μL,按外标法以峰面积计算(R)-α-羟基苯丁酸乙酯中的(S)-α-羟基苯丁酸乙酯的含量。(S)体的线性范围5．5～23．8μg／mL,检出限0．47μg／mL(S／N=3),回收率为96％～103％,精密度RSD为2．1％(n=6)。     

高效液相色谱法测定金羚感冒胶囊中阿司匹林的含量

用高效液相色谱法测定金羚感冒胶囊中阿司匹林的含量：采用RP-C18色谱柱,体积比为30：70的甲醇-0．03mol／L磷酸二氢钾溶液(用磷酸调节至pH=2．4)作流动相,流速为1．0mL／min,检测波长为280nm,阿司匹林色谱峰面积与其浓度在146.8～734μg／mL内线性关系良好,相关系数r=0．9998,阿司匹林的平均回收率为99．70％,相对标准偏差为0.18％(n=5)。     

甲卡西酮的液相色谱法测定

建立了高效液相色谱法测定甲卡西酮的含量。采用AgilentZorbax SB-Phenyl柱,流动相为三氟乙酸（pH3．51-乙腈（体积比85：15）,流速0．2mL／min,检测波长254nm。甲卡西酮的浓度在0.5—1000μg／mL范围内与色谱峰面积呈良好的线性关系,F=0．999,日内与日间保留时间和峰面积测定结果的标对标准偏差均不大于1．48％（n=6）,检出限为0．063μg／mL,平均加标回收率为118.2％。该方法适用于甲卡西酮的定性定量分析。     

荧光光谱法测定水泥中硫酸根含量

0．1mol／LHCl—4．0mg／mL TX-100—0．05mol／LBaCl2溶液体系的荧光很弱,加入SO4^2-后形成的(BaSO4)。微粒在410nm、470nm处产生2个荧光峰,SO4^2-浓度在2．0～80μg／mL浓度范围内与F470呈线性关系．据此建立了一个测定水泥样品中硫酸根的简便灵敏的荧光光谱分析新方法,其相对偏差(RSD)在1．90%-3．9％之间,回收率在97．0％～102％之间．     

高效液相色谱法测定食品中的甜蜜素

利用次氯酸钠将食品中的甜蜜素转化为N,N-二氯环己胺,以正己烷萃取后用高效液相色谱法测定。采用Extend-C18 5μm不锈钢柱,以甲醇-水(体积比为80：20)作流动相,二极管阵列检测器检测波长为314nm。甜蜜素的浓度在1～80μg／mL内与色谱峰面积成良好的线性关系,回收率为102．8％～103．0％,检出限为1μg／mL,测定结果的相对标准偏差为0．84％。     

HPLC法测定西沙必利片的含量

建立了测定西沙必利片含量的HPLC法。以Kromasil Cl8柱为色谱柱、0．02mol／L磷酸二氢钾缓冲液(pH=4．5)-乙腈(体积比为70：30)为流动相，流动相的流速为0．8mL／min，检测波长为308nm。西沙必利的浓度在5-125μg／mL范围内与色谱峰面积呈线性关系，线性相关系数r=0．9998，测定结果的平均加标回收率为99．91％，相对标准偏差为0．33％。     

HEPT类化合物的QSAR研究

为定量结构／活性相关性研究提取了量子化学参数,拓扑指数Am,分子连接性指数^mxt及疏水性常数,同时应用正交变换和最佳变量子集算法（Leaps-and-Bonds)进行了变量压缩和选择,进而实施了多元回归分析,并由此结果进行了HEPT类化合物（1－[(2-hydroxyethoxy)methyl]-6-(phenylthio)-thymine derivatives)的结构／活性关系的理论解释,进行了人工神经网络法对于该类化合物的活性预测,其结构明显好于多元回归法。     

From the Micro- to the Macro-: Managing the Conservation of the Warship,Vasa

Sweden's famous warship, Vasa, sank on her maiden voyage in August 1628, and remained on the bottom of Stockholm harbour for 333 years. Raised in 1961, she became the first large-scale wooden object to be treated with polyethylene glycol (PEG). In the summer of 2000 a number of acidic salt precipitations were noticed on the surface of the ship and on wooden artefacts in the storerooms. An international research project has been established to look into the causes of this problem and suggest possible re-treatments. Meanwhile projects are underway to monitor movements in the ship, to build a better support system, and to replace the thousands of iron bolts holding the structure together, while a sophisticated new climate system has recently been installed in the museum.     

液滴荧光传感与计算机联用技术在微量分析中的应用

通过在LS55型荧光-磷光-发光分光光度计上加装液滴产生及调节附件,采用计算机采集与分析处理数据,成功地研制了双通道液滴光化学传感装置.利用葡聚糖凝胶对复合维生素B中不同组分的选择性吸附来达到分离与同时检测的目的,并将其用于复合维生素B药片的分析,取得了满意的结果.     

Using of the Agglomeration-in-liquid for the Technology of the Fine Materials

The content of the fine and ultrafine particles in the raw material results in difficulty of the separation, the loss of the valuable components and ecological contamination. Secondary using of the fine particles is impossible without their granulation. This problem has been solved by the agglomeration-in-liquid method.An agglomeration-in-liquid method is a process to produce agglomerates in a liquid phase from solid particles suspended in the liquid. The surface of solid particles and the binding liquid must be of identical polarity, but the continuous phase must be of the opposite polarity. The water solutions of the surfactant are the binding liquids or the organic liquids.     

On the scaling of the interface energy of the liquid clusters in the disordered nanoporous medium

Similarity of the extrusion curves of non-wetting liquid in a nanoporous medium with different initial fill volume fractions is observed experimentally. The similarity can be explained by the scaling of the interface energy and the self-similarity of the infinite percolation cluster of fluid-filled pores. Understanding the physical processes leading to the observed phenomena is a foundation for the development of high-performance devices for damping and energy storage on the basis of such heterogeneous systems.     

Copper-containing dendromesogens: the influence of the metal on the mesomorphism

The synthesis and liquid crystalline behaviour of the first and second generations of a dendrimeric structure based on poly(propyleneimine)(DAB-dendr(NH₂)_x) are reported. 4-(4-n-Alkoxybenzoyloxy)salicylaldehydes are used as mesogenic moieties attached at the peripheral amino groups of the dendrimers giving rise to dendromesogens with four and eight mesogenic branches. From these dendromesogens, considered as organic ligands, were prepared six metal-containing dendrimers which incorporate two or four copper atoms in their structures. All the dendrimeric ligands and three of the metal-containing dendrimers exhibit liquid crystalline properties which were studied by optical microscopy, DSC, X-ray diffraction and EPR spectroscopy.     

On the quality of the hardness kernel and the Fukui function to evaluate the global hardness

An approximated hardness kernel, which includes the second derivative with respect to the density of the kinetic energy, the electron-electron coulomb repulsion, and the exchange density functionals, has been tested for the calculation of the global hardness. The results obtained for a series of 40 cations and neutral systems and 16 anions represent in most cases an improvement of the results obtained using the HOMO-LUMO gap approach and indicate the viability of this approach to evaluate global hardness. In addition, the relevance of the Fukui function approximation and the role of the three components of the hardness kernel in the evaluation of the global hardness have been analyzed.     

光亮剂对银电沉积行为的影响

用电势阶跃法和旋转圆盘电极法 (RDE)以及SEM和XRD测试手段 ,初步研究了光亮剂对氰化体系中银电沉积行为的影响 .研究表明 ,光亮剂的加入并未导致银电沉积成核机理的改变 ,但显著增强了镀液的微观平整效应 ,并且所得镀层的表观光滑程度明显改善 .XRD测试亦同时表明光亮剂的加入并未改变镀层的择优取向     

Influence of the Position of the Connecting Spacer of the Chromophore on the Nonlinear Optical Response

A new chromophore, C1 , based on a similar DπA‐structure as in the FTC ‐chromophore but with a hydroxyalkyl spacer perpendicular to the direction of the dipole moment was synthesized. Both chromophores and the CLD ‐chromophore were used to prepare high T_g nonlinear optical vinyl polymers. The influence of the position of the spacer on the DπA‐system on the NLO response of the resulting polymers was investigated.