在邻菲罗啉类试剂存在下银与卟啉显色反应的研究

本文研究了三种邻菲罗啉类试剂对银（Ⅰ）与六种不同取代基卟啉试剂显色反应的影响。研究结果表明：于ｐＨ９．２时在３５～４０℃放置１０～１５ｍｉｎ，银与邻菲罗啉类试剂和卟啉试剂能形成多元络合物。我们分别测定了Ａｇ－ｐｈｅｎ－ＴＰＰＳ４、Ａｇ－ｐｈｅｎ－Ｔ（４－ＭＯＰ）ＰＳ４和Ａｇ－ｐｈｅｎ－Ｔ（４－ＨＰ）ＰＳ４体系的络合比及稳定常数，详细讨论了Ａｇ－ｐｈｅｎ－Ｔ（４－ＭＯＰ）ＰＳ４体系的光度性质，把所确     

5，10，15，20－四（3－溴－4－磺酸苯基）卟啉光度法测定痕量铜的研究

本文研究了新水溶性卟啉试剂５，１０，１５，２０－四（３－溴－４－磺酸苯基）卟啉［Ｔ（３－ＢｒＰ）ＰＳ＿４与铜的显色反应。在ｐＨ３，铜与５，１０，１５，２０－四（３－溴－４－磺酸苯基）卟啉形成１：１的稳定配合物。此配合物的最大吸收波长位于４１２．８ｎｍ，摩尔吸光系数为２．６１×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。铜量在０～３．０μｇ／２５ｍＬ范围内符合比尔定律，工作曲线回归方程为ｙ＝０．００９４３、＋０．１６７ｘ，相关系数为ｒ＝０．９９９７。方法有较高的灵敏度和较好的选择性，直接用于大米和茶叶中痕量铜的测定，结果与ＡＡＳ法一致。     

卟啉试剂光度法间接测定硫离子的研究（1）

本文以ＴＰＰＳ４、Ｔ（４－ＭＯＰ）ＰＳ４和Ｔ（４－ＭＰ）ＰＳ４为例，研究了Ａｇ·ｐｈｅｎ·ＰＰ光度法间接测定废水中痕量硫离子的有关条件。同时用上述三种卟啉试剂试验了Ｃｕ￣（２＋）、Ｈｇ￣（２＋）、Ｃｄ￣（２＋）、Ｐｂ￣（２＋）等软酸和交界酸间接测定Ｓ￣（２－）的可能性，结果表明，Ｈｇ－ＰＰ也可用于间接测定Ｓ（２－）。最后，对Ｈ＿２Ｓ的吸收液进行了筛选。     

在CTMAB及α，α－联吡啶存在下茜素红与铁显色反应的研究

在ＣＴＭＡＢ及α，α－联吡啶存在下茜素红与铁显色反应的研究周坚勇（浙江省上虞市卫生防疫站，上虞市３１２３００）铁的测定一般用邻菲啉法￣［１］。茜素红作为一种定性鉴定铝￣［２］的试剂已应用于钼￣［３］钨￣［４］的测定，但用于铁的测定还未见报道，本文研究...     

BTMPPA与HPMBP协同萃取稀土元素（Ⅲ）的研究

研究了二（２，４，４－三甲基戊基）膦酸（ＢＴＭＰＰＡ，ＨＬ）和１－苯基－３－甲基－４－苯甲酰基吡唑酮－５（ＨＰＭＢＰ，ＨＡ）的苯溶液在不同矿物酸介质中，对稀土元素（Ⅲ）的ＡＡ类协同革取。以Ｎｄ￣（３＋）、Ｙｂ￣（３＋）为例，研究了ＢＴＭＰＰＡ－ＨＰＭＢＰ苯溶液从ＨＮＯ＿３介质中协同萃取稀土元素（Ⅲ）的机理。用斜率法确定了协萃配合物组成为Ｎｄ（ＨＬ＿２）Ａ＿２、Ｙｂ（ＨＬ）２）＿２·Ａ·ＨＡ，计算了协萃平衡常数。     

5，10，15，20－四（3－溴－4－磺酸苯基）卟啉光度法测定痕量锌的研究

本文研究了新水溶性卟啉试剂５，１０，１５，２０－四（３－溴－４－磺酸苯基）卟啉［Ｔ（３－ＢｒＰ）ＰＳ４］与锌的显色反应。在ｐＨ４，锌与５，１０，１５，２０－四（３－溴－４－磺酸苯基）卟啉形成稳定的１：１配合物，其最大吸收波长位于４２２．０ｎｍ，摩尔吸光系数为３．９×１０５Ｌ·ｍｏｌ（－１）·ｃｍ（－１）。锌量在０～２．５μｇ／２５ｍＬ范围符合比尔定律。方法具有较高的灵敏度和较好的选择性，用于人发和大米中痕量锌的测定，结果与原子吸收法一致。     

增效试剂对过氧化物模拟酶催化显色体系的增效作用——Fe-TPPS_4-4-AAP-苯酚衍生物-H_2O_2体系

本文以β－环糊精（β－ＣＤ）和表面活性剂为增效试剂，分别研究了它们对以Ｆｅ－ｍｅｓｏ－（四（４－磺基苯）卟啉）（Ｆｅ－ＴＰＰＳ４）为催化剂，催化过氧化氢氧化４－氨基安替比林（４－ＡＡＰ）与苯酚衍生物显色反应的速度和灵敏度的影响，发现β－ＣＤ和十二烷基苯磺酸钠（ＳＤＢＳ）对该体系具有明显的增效作用．在３×１０－３ｍｏｌ／Ｌβ－ＣＤ存在下，测定Ｈ２Ｏ２的灵敏度比文献报道的提高了１．５６倍．利用ＳＤＢＳ浓度与催化显色反应初速度的增加值之间的线性关系，建立了测定微量ＳＤＢＳ的方法     

四（4—甲氧基—3—磺酸苯基）卟啉分光光度法测定微量铅

研究了水溶性卟啉５，１０，１５，２０－四（４－甲氧基－３－磺酸苯基）卟啉（Ｔ（４－ＭＯＰ）ＰＳ４）与铅的显色反应，在ｐＨ１１和酒石酸钾存在下铅与Ｔ（４－ＭＯＰ）ＰＳ４在室温时间形成１：１的配合物，其最大吸收波长在位于４６４．４ｎｍ，摩尔吸光系数为２．３×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，铅量在０～２０μｇ／２５ｍＬ，范围为符合比尔定律，工作工线回归方程Ａ＝０．０２６２＋０．０４３５ｃ相关系数ｒ     

非水溶性新卟啉显色剂T（BHMOP）P与Cd（Ⅱ）显色反应的研究及应用

系统研究了新合成的非水溶性卟啉显色剂ｍｅｓｏ－四（３－溴－４－羟基－５－甲氧基苯基）卟啉，简称Ｔ（ＢＨＭＯＰ）Ｐ，与Ｃｄ（Ⅱ）的显色反应条件。在Ｔｗｅｅｎ－８０存在下，不需任何催化剂，沸水浴１４ｍｉｎ，Ｃｄ（Ⅱ）与Ｔ（ＢＨＭＯＰ）Ｐ形成稳定的绿色配合物，ε（４４２）＝２．２９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１。在混合掩蔽剂存在下，应用于大米、面粉及皮蛋等食品中痕量镉的测定，结果满意。     

用MeSO－四（3，5－二溴－4－羟基苯基）卟啉试剂二阶导数光度法测定痕量铅

用ＭｅＳＯ－四（３，５－二溴－４－羟基苯基）卟啉试剂二阶导数光度法测定痕量铅李在均，潘教麦，徐钟隽（华东师范大学化学系，上海２０００６２）关键词：二阶导数光度法，铅的测定，人发Ｔ（ＤＢＨＰ）Ｐ是铅的高灵敏显色剂￣［１］，已用于矿样等样品中铅的测定。￣...     

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.     

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.     

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.     

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     

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 dependence of the critical supersaturation on the initial undersaturation in the reverse Wilson chamber

The dependence of the critical supersaturation on the degree of the initial undersaturation has been analyzed in detail.This dependence is explained by means of the Richarch-Powell equation, taking into account the dependence of the -ratio upon the partial pressures of the inert gas and the liquid under investigation.     

Behavior of the Surface Tension and the Viscosity in the Eutecticregion of the Liquid Feb alloy

Abstract

Thermodynamic and transport properties of pure liquid metals show interesting correlations near the melting temperature. This is well known for the case of the surface tension σ and the shear viscosity η In this paper we investigate the possible extension of these correlations to binary alloys, taking the FeB alloy as a case study. Based on literature data we analyze the variation of σ and η as a function of temperature and concentration in a deep eutectic region of the phase diagram of this alloy, as well as the possible correlations between those two quantities. Substantial differences with respect to the behavior in pure metals are found.