神经网络法计算镉（Ⅱ）,羟基及碳酸根三元体系的形态分布

采用前馈线笥网络ＢＰ算法，计算了Ｃｄ６２＋－ＯＨ＾－ＣＯ＾２－３三元体系的累积稳定常数。用Ｈｏｐｆｉｅｌｄ反馈网络研究了体系中络合物的形态分布。溶液中溶解的ＣＯ２对ｌｇβ１的计算结果有重要影响，对ｌｇβ２，ｌｇβ３，ｌｇβ４的结果影响不大。     

遗传算法模拟计算Pb^2＋—FA—SO^2—4体系的化学形态分布

研究了水体中重要污染元素铅在富里酸（ＦＡ），ＳＯ＾２－４共同存在的化学形态分布，根据物料平衡和化学平衡建立了Ｐｂ＾２＋－ＦＡ－ＳＯ＾２－４的化学模型，用Ｐｂ＾２＋滴定络合剂ＦＡ和ＳＯ＾２－４的混合溶液，使用ＡＳＶ测定阳极溶出电流并采用遗传算法（ＧＡ）对铅的化学形态进行了模拟计算，用成对ｔ检验的结果表明，阳极溶出电流的计算值和实测值之间的无显著性差异。     

维脑路通与铜(Ⅱ)的配位化学研究

用单扫描极谱法研究了Ｃｕ＾２＋与维脑路通（ＶＥＮＯＲＵＴＯＮ,简称ＶＲＴ）形成配合物的条件和机理,在磷酸盐缓冲溶液中（ＰＨ７．０）,Ｃｕ＾２＋与维脑路通配位并产生１个不可逆还原波,其峰电位为－０．５５Ｖ（ｖｓ．ＳＣＥ）。配合物的摩尔组成比为Ｃｕ＾２＋,ＶＲＴ＝１：２,表观稳定常数为１．１＊１０＾１１。     

合金钢中铬的示波滴定

根据Ｐｂ＾２＋能与ＣｒＯ＾２－４定量形成沉淀，过量的Ｐｂ＾２＋在ｄＥ／ｄｔ～Ｅ曲线上有敏锐切口的性质，本文研究了用Ｐｂ＾２＋标准溶液直接进行合金钢中铬的示波滴定法新方法，该方法矾不被同时滴定，不用加外指示剂，抗溶剂颜色及沉淀干扰的能力强，具有快速，简便，准确等特点，适用于多种合金钢中铬的快速测定。     

离子浮选石墨炉原子吸收光谱法测定水中痕量Cr（Ⅵ）／Cr（Ⅲ）

本文以二苯卡巴肼（ＤＰＣＩ）和十二烷基硫酸钠（ＳＬＳ）为浮选剂研究了分离浓缩（Ｃｒ（Ⅵ）的最佳条件，建立了水中痕量络的形态分析方法。该方法简单、快速、检测限０．０３μｇＬ＾－１，变异系九小于４％，２００ｍＬ水样中含ＮＯ３５０，Ｎａ＾＋，Ｍｇ＾２＋４０，Ｃｌ２８，Ｄ，Ｃａ＾２＋，ＳＯ４１０，ＣＯ３９，Ａｌ＾２＋，Ｃｏ＾２＋，Ｎｉ６２＋５，Ｍｎ＾２，Ｐｂ＾２＋２．５，Ｆｅ＾３＋０．２ｍｇ不影响测定。方     

吸附条件对活性碳纤维SACF氧化还原吸附Ag^＋的影响

本文研究了吸附条件对活性碳纤维ＳＡＣＦ氧化还原吸附Ａｇ＾＋的影响。结果表明：Ａｇ＾＋初始浓度的提高，反应温度的升高均可提高ＳＡＣＦ对Ａｇ＾＋的吸附量；Ａｇ＾＋的吸附量还强烈地依赖于溶液的ＰＨ值，用ＮａＡＣ、ＨＡＣ＋ＮａＡＣ或ＮＨ３．Ｈ２Ｏ调高Ａｇ＾＋溶液的ＰＨ，可有效地增加ＳＡＣＦ对Ａｇ＾＋的吸附量；用ＮＨ３．Ｈ２Ｏ调节会再现一个最佳的ＰＨ值；通过增加ＳＡＣＦ用量，Ａｇ＾＋的吸附率可达９９％以上。     

遗传算法用于铅的化学形态模拟计算

采用一种全局优方法－遗传算法计算了水体中Ｐｂ＾２＋的化学形态分布，讨论了评从是孙数，初值，群休一中个体数，遗传速率，变异速率等参数选择对计算结果的影响，证明了所建立的模型和彩和的算法的可行性。     

用原子吸收光谱对痕量铬作价态分析

本文详细研究了鱼腥藻对Ｃｒ＾３＋和Ｃｒ＾６＋离子的选择吸附条件，发现Ｃｒ＾３＋的最佳吸附ＰＨ值为４－５；Ｃｒ＾６＋的最佳ＰＨ为７左右，一定量柠檬酸能抑制Ｃｕ＾２＋，Ｐｂ＾２＋及Ｃｄ＾２＋对Ｃｒ＾６＋的吸附干扰。建立了痕量铬的不同价态原子吸收分析方法；对金属离子与藻之间的吸附机理作了初步探讨。     

M（Ⅱ）（ATP）^2—与核酸碱基（腺嘌呤,胞嘧啶）三元混配配…

用ＰＨ电位滴定法测定 篱子（Ｍ＾２＋＝Ｃｕ＾２＋，Ｃｏ＾２＋，Ｎｉ＾２＝，Ｚｎ＾２＋，Ｃｄ＾２＋）与核酸碱基（Ｐ＝腺嘌呤，胞嘧啶）形成的二夫配合物以及与腺甘－５＇－三酸（ＡＴＰ）形成的三元混配配合物的稳定常数，三元配合物相对于二元酚物的稳定性用平衡常数ΔｌｇＫＭ大，这可能与三元混配配合物分子内存在配体间的芳环堆积、氢键作用以及πＡ－πＢ协同效应有关。     

动力学光度法测定痕量铅的研究

在氨水介质中，Ｐｂ＾２＋阻抑过氧化氢氧化偶氮胂Ⅰ褪色的作用，研究了动力学分光光度法测定痕量Ｐｂ＾２＋的新方法。该方法的检出限为４．４×１０＾－１１ｇ／ｍＬ Ｐｂ＾２＋，线性范围为０～１．０μｇ／２５ｍＬ Ｐｂ＾２＋，用以测定人发中的Ｐｂ＾２＋，获得了满意的结果。     

低聚氨基葡萄糖的化学合成及修饰研究进展

低聚氨基葡萄糖是一种天然多糖,已在医药、农药等领域得到了应用。由于它具有良好的生物活性,因此,低聚氨基葡萄糖的化学合成和修饰成为该研究领域的重要方向之一。本文综述了近年来低聚氨基葡萄糖的化学合成和结构修饰方面的研究进展,着重介绍了化学修饰方法。     

化学混沌主方程的随机模拟

在分子运动层次上,研究大量粒子的无序运动如何导致宏观上的集体行为已有很长的历史．在宏观层面上,耗散过程一般用一组唯象常微分或偏微分方程描述．虽然从微观上对无序的分子运动的描述在物理上更为基本,但是宏观上的唯象描述数学处理则更加方便．实际上,探讨诸如耗...     

化学公会:我国第一个化学专业团体

The Chemical Society founded in the era of The Reform Movement of 1898 was the first chemical society in China. Through the research on its background and the cause of its establishment, it was found that it played an exemplary role in the establishment and development of the chemical society.     

Why take chemistry stoically? The case of Posidonius

This paper analyzes views of the Stoic philosopher Posidonius (1st century BC) in the light of modern Chemistry. I propose that Posidonius’ account on “generation and destruction” bears noteworthy similarities to the scientific notions of chemical elements, chemical species, nuclear reactions, and the law of conservation of mass. I find that his views compare favorably also with our understanding of chemical change at solid surfaces. Provided his thought is correctly placed in the cultural context of his day, I argue that Posidonius deserves a previously un-acknowledged consideration in the historical background of modern Chemistry.

Thermochemistry of intercalation of n-alkylmonoamines into lamellar hydrated barium phenylarsonate

Hydrated layered crystalline barium phenylarsonate, Ba(HO₃AsC₆H₅)₂·2H₂O was used as host for intercalation of n-alkylmonoamine molecules CH₃(CH₂)_n-NH₂ (n = 1-4) in aqueous solution. The amount intercalated (n_f) was followed batchwise at 298 ± 1 K and the variation of the original interlayer distance (d) for hydrated barium phenylarsonate (1245 ppm) was followed by X-ray powder diffraction. Linear correlations were obtained for both d and n_f as a function of the number of carbon atoms in the aliphatic chain (n_c): d = (2225 ± 32) + (111 ± 11)n_c and n_f = (2.28 ± 0.15) − (11.50 ± 0.03)n_c. The exothermic enthalpies of intercalation increased with n_c, which was derived from the monomolecular amine layer arrangements with the longitudinal axis inclined by 60° to the inorganic sheets. The intercalation was followed by titration with amine at the solid/liquid interface and gave the enthalpy/number of carbons correlation: ΔH = −(7.25 ± 0.40) − (1.67 ± 0.10)n_c. The negative Gibbs free energies and positive entropic values reflect the favorable host/guest intercalation processes for this system.     

元素国150周年盛典

This paper uses personification to show the birth of periodic table of elements, the periodic laws of elements and the characteristics of different elements in the form of stage play.     

高校化学实验教学中产生的化学废物的回收及处理

针对高校化学实验教学中产生的不能直接排放的废物、废液,在大量工作的基础上归纳总结出对部分实验室化学废物的回收和处理方法,并有针对性地提出相应的长效运行措施。     

Derivatisation reactions in the chromatographic analysis of chemical warfare agents and their degradation products

The analysis of chemical warfare agents and their degradation products is an important component of verification of compliance with the Chemical Weapons Convention. Gas and liquid chromatography, particularly combined with mass spectrometry, are the major techniques used to detect and identify chemicals of concern to the Convention. The more polar analytes, and some of the more reactive or highly volatile agents, are usually derivatised to facilitate chromatography, and to impart properties beneficial for detection. This review focuses on derivatisation reactions used in the chromatographic analysis of chemical warfare agents, their degradation products and metabolites.