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。     

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。     

新试剂5－（2，6－二溴－4－硝基苯偶氮）－8－羟基喹啉的合成及与锌的显色反应研究和应用

本文合成了５－（２，６－二溴－４－硝基苯偶氮）－８－羟基喹啉。研究了在Ｔｗｅｅｎ－８０增溶下新试剂与Ｚｎ￣（２＋）的显色反应。试验表明，配合物的最大吸收峰位于５４５ｎｍ，表观摩尔吸光系数为６．７ｘ１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），Ｚｎ（Ⅱ）浓度在０～１５μｇ／２５ｍＬ范围内符合比耳定律。该法用于人发中微量锌的直接测定，结果满意。     

1－（4－安替比林基）－3－（2，4－二硝基苯基）－三氮烯与汞（Ⅱ）新显色条件的研究及其应用

研究了１－（４－安替比林基）－３－（２，４－二硝基苯基）－三氮烯与汞（Ⅱ）显色反应新的显色条件，建立了一个高灵敏度、高选择性的汞的分光光度方法。方法直接用于地面水和尿液中汞的测定，其加入回收率为９４．１～１０４．４％，变异系数为３．５％，所得结果与冷原子吸收法一致。     

溴化十六烷基三甲胺存在下,9—（3,5—二溴）水杨基荧光酮与锡的显色反研究及

本文研究了在溴化十六烷基三甲胺存在下，９－（３，５－二溴）水杨基荧光酮与锡的显色反应。实验表明：该显色反应灵敏度高，选择性好，稳定时间长。用于水和矿石中锡的测定，结果符合分析要求。     

2－（2－噻唑偶氮）－5－〔N，N－二羧基甲基）氨基〕苯酚的分析特性和钴测定的研究

研究了新显色剂２－（２－噻唑偶氮）－５－［（Ｎ，Ｎ－２羧基甲基）氨基］苯酚（ＴＡＤＣＡＰ）与金属离子的显色反应，着重探讨了试剂与Ｆｅ￣（３＋）、Ｃｏ￣（２＋）、Ｎｉ￣（２＋）、Ｃｕ￣（２＋）、Ｚｎ￣（２＋）、Ｍｎ￣（２＋）显色反应的最佳条件，测定了这些络合物的络合比和稳定常数等，同时建立了钴的分析方法，并用于维生素Ｂ＿（１２）注射液中Ｃｏ￣（２＋）的测定。     

冠醚DPDB－18－C－6与钾显色反应的分光光度法研究

冠醚ＤＰＤＢ－１８－Ｃ－６与钾显色反应的分光光度法研究黄青瑜，营豫梅，谢明贵（四川联合大学化学系成都６１００６４）关键词钾，二苦胺基二苯并－１８－冠－６，分光光度法目前碱金属的光度测定，较为广泛的是借助阴离子染料生成三元配合物的显色方法［１－２］。近...     

7－（4，5－二甲基－2－噻唑偶氮）－8－羟基喹啉与锌显色反应的研究和应用

探讨题示试剂（ＤＭＴＡＱ）与锌离子的显色反应条件，当ｐＨ为５．５，在ＴｒｉｔｏｎＸ－１００存在下，ＤＭＴＡＱ与锌离子形成红色配合物，最大吸收峰位于５４５ｎｍ，表观摩尔吸光系数９．４×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），锌量在０～２５μｇ／５０ｍＬ范围内符合比尔定律。该法可用于测定人发中的微量锌。     

用2－（2′－咪唑偶氮）苯酚－4－磺酸作显色剂测定铁

本文研究了咪唑偶氮苯酚－４－磺醚与Ｆｅ（Ⅱ）的显色反应条件，应用拟定的方法测定了菠菜、芹菜、人发、天然水中微量铁的含量，回收率在９５％以上，结果令人满意。     

新试剂10－（2－羧基苯偶氮）－9－菲酚的合成及与铈显色反应的研究

本文研究新试剂１０－（２－羧基苯偶氮）－９－菲酚（简称ＣＡＰ）的合成，测定试剂的离解常数。研究了试剂ＣＡＰ与铈（Ⅳ）的显色反应。在表面活性剂ＯＰ存在下，光度法测定球墨铸铁中铈的含量，结果较满意。     

气相色谱与原子吸收联用及其在有机锡化合物形态分析中的应用

本文研究适合于有机锡化合物形态分析的气色谱－原子吸收联用技术的接口。在优化、改进的分离测定条件下，成功地实现了一甲基锡、二甲基锡、三甲基锡、一丁基锡、二丁基锡、三丁基锡、四丁基锡化合物的分离，并以内标法测定了湖、海水、工业废水等水样中的丁基锡化合物。     

New and efficient synthesis of solid-supported organotin reagents and their use in organic synthesis

Novel resin-bound organotin reagents have been prepared, including for the first time resin-bound dimethyl tin reagents. Mild methodology has also been developed for the very efficient synthesis of resin-bound distannanes. The resin-bound tin chloride reagents have been used in a catalytic Stille coupling cycle and the resin-bound distannanes have been used in atom transfer cyclisations and proved to be much more effective than previously described resin-bound distannanes. As expected the use of resin-bound tin reagents facilitated their easy removal at the end of the reaction, and consequently residual tin levels in the organic products were low or negligible. The resin-bound distannanes could not, however, be successfully used for the palladium catalysed stannylation of a simple aryl iodide, which would have provided a useful approach to radiolabeling of aromatic substrates. The reasons for the failure in the stannylation process is unclear but crystal structure evidence indicates that there is a hypervalent interaction between the resin-bound tin atom and an adjacent ether oxygen which may effect the reactivity of the tin intermediates in the stannylation sequence.     

Electrochemical and spectroscopic studies of ethanol oxidation on Pt stepped surfaces modified by tin adatoms

Ethanol oxidation on platinum stepped surfaces vicinal to the (111) pole modified by tin has been studied to determine the role of this adatom in the oxidation mechanism. Tin has been slowly deposited so that the initial stages of the deposition take place on the step, and deposition on the terrace only occurs when the step has been completely decorated. Voltammetric and chronoamperometric experiments demonstrate that tin on the step catalyzes the oxidation. The maximum enhancement is found when the step is completely decorated by tin. FTIR experiments using normal and isotopically labeled ethanol have been used to elucidate the effect of the tin adatoms in the mechanism. The obtained results indicate that the role of tin is double: (i) when the surface has sites capable of breaking the C-C bond of the molecule, that is, when the step sites are not completely covered by tin, it promotes the oxidation of CO formed from the molecular fragments to CO(2) through a bifunctional mechanism and (ii) it catalyzes the oxidation of ethanol to acetic acid.     

ICP-AES法测定焊锡中铜铁铝锌

本文以ICP-AES法测定焊锡中铜、铁、铝、锌。提出了不用分离锡、铅,直接测定前三个元素的可行性;及分离锡、铅后,四元素同时测定的可行性;并对测定条件、测定方法和分离锡铅的步骤进行了研究。方法比较简便,能满足焊锡样品测定的要求。     

Sorption Studies in DMSO-NITRIC Acid and DMSO-Acetic Acid Systems and Separation of Metal Ions on TIN(IV)-Iodophosphate

Abstract

Some new samples of tin(IV)-iodophosphate have been synthesized and their ion exchange properties have been studied. Adsorption behaviour of different metal ions on tin(IV)-iodophosphate (TIP₅), in H⁺ form, in different solvent systems have been examined. Kd values of few metal ions, in 4M DMSO medium, have also been determined on the same ion-exchanger in NH⁺ ₄ form. Effect of particle size of tin(IV)-iodophosphate (TIP₅), in H⁺ form, on the Kd values of metal ions has been studied. Separations of a number of metal ions have been achieved on tin(IV)-iodophosphate (TIP₅) columns.     

气体分析用锡片和锡囊的研制与应用

本文提出了一种填补国内空白的新产品－气体分析用锡片和锡囊的研制方法。对锡片，锡囊的外观和内在质量检测结果证明，研制的锡片，锡囊完全达到了美国ＬＥＣＯ公司同类产吕的技术标准，而价格只有进口产品的四分之一左右。应用结果表明，该产品完全可以取代进口，完全适用于用事种金属及其俣金材料中气体分析的要求。     

The differential pulse polarographic determination of trace amounts of tin and its application to zinc-aluminium alloys

A differential pulse polarographic procedure for the determination of 0.001-0.02% of tin in zinc-aluminium alloys is described. The tin is first separated from interfering elements such as copper and lead by homogeneous co-precipitation with aluminium succinate. The tin is determined polarographically in a 1M hydrochloric acid + 4M ammonium chloride electrolyte. After the tin has been masked with alkaline citrate a second polarogram is recorded to ascertain whether residual lead is present and, if so, a correction is applied.     

Preparation of di(n-butyl) tin and di(n-octyl) tin dihalides by the direct synthesis method

The direct synthesis of the two industrially important organotin intermediates, di(n-butyl)tin and di(n-octyl)tin dihalides, has been investigated by reacting the appropriate alkyl halide with metallic tin undervarying conditions. Observations were made on the influences of temperature, pressure, reaction time, nature of the tin metal, organic halide/tin reactant ratios and the presence of catalysts on the extent of tin conversion and yields of the organotin products. The efficacy of the onium halides, notably n-Bu₄NI, Me₃SI and Ph₃MeAsI, either singly or in binary combinations with iodine or inorganic iodine compounds, in catalysing the synthesis of the above dialkyltins as well as higher di(n-alkyl)tin analogues is described.     

Physicochemical and photocatalytic properties of tin dioxide supported onto silica gel

Journal of Thermal Analysis and Calorimetry - The samples containing 1–10% tin dioxide supported onto silica gel have been synthesized via precipitation or thermolysis of tin tetrachloride....     

A Comparative Study of the Synthesis and Ion Exchange Properties of Iodophosphates of Tin(IV), Zirconium(IV) and Iron(III): Separations of Metal Ions on Tin(IV)-iodophosphate Columns

Abstract

Iodates and iodophosphates of tin(IV), zirconium(IV) and iron(III) have been synthesized under varying conditions and studied their ion exchange behaviour. Among the various ion exchangers synthesized, tin(IV)-iodophosphate is chosen for detailed study owing to its highest ion exchange capacity and highest chemical stability. The most stable sample is prepared by mixing 0.1M stannic chloride, 0.1M potassium iodate and 0.1M potassium dihydrogen orthophosphate solutions in the volume ratio 1:1:2 respectively at pH 0–1. It is a monofunctional weak cation exchanger. Its ion exchange capacity for K⁺ is 1.6 meq/dry g. The thermal and chemical stabilities of this material have been determined and compared with Zr(IV)-phosphoiodate. Effect of heating on the properties of tin(IV)-iodophosphate has been determined. To explore the separation potential of tin(IV)-iodophosphate Kd values of different metal ions have been determined in organic solvents. A number of important separations of metal ions of industrial utility have been successfully achieved on the columns of tin(IV)-iodophosphate.