高碘酸钾氧化酸性铬蓝K催化光度法测定痕量锰

研究了测定痕量锰的新催化光度法，在pH11.90的条件下，锰（Ⅱ）催化高碘酸钾氧化酸性铬蓝K的反应。测定锰的线性范围为0—8．0ng／mE，检出限为0．05ng／mL。用于饮用水中锰的测定，方法的回收率在94．3％-102．7％范围内，结果令人满意。     

催化动力学光度法测定水中微量锰

１引言研究了锰（Ⅱ）催化亮绿ＳＦ褪色反应的动力学特性。在ＮａＡｃ－ＨＡｃ介质中，锰（Ⅱ）对高碘酸钾氧化该试剂的褪色反应具有强烈催化作用，其褪色反应速率与锰（Ⅱ）的浓度在一定范围内呈良好的线性关系。详细研究了亮绿ＳＦ催化动力学光度法测定微量锰（Ⅱ）的条件，建立了测定微量锰（Ⅱ）的新方法。有关文献中催化动力学光度法测定锰（Ⅱ）的检出限大多为１０－１０ｇ／ｍＬ，本方法的检出限为６．０×１０－１１ｇ／ｍＬ，选择性较好，方法相对标准偏差２．５％，用于测定水样中的锰，结果满意。２实验部分２．１主要试剂和仪器…     

锰的准液膜富集及原子吸收法测定

本文利用准液膜法与火焰原子吸收法相结合测定锰，方法的精密度为１．９％，回收率为９８．９％，可富集测定ｎｇ／ｇ级的锰。本方法已用于人发，湖水和茶中锰的分析。     

锰（Ⅱ）—苯酚红—高碘酸钾—邻菲Luo啉体系催化光度法测定痕量锰的研究

研究了在碱性介质中，以邻菲Ｌｕｏ啉为活化剂，锰（Ⅱ）催化高碘酸钾氧化苯酚红褪色指标反应及其动力学条件，建立了测定痕量锰的新方法。锰的浓度在０．０．０７μｇ／ｍＬ范围内为线性关系，检测限为３．０ｎｇ／ｍＬ。用于盐酸试剂中痕量锰的测定，结果良好。     

锰（Ⅱ）－苯酚红－高碘酸钾－邻菲啰啉体系催化光度法测定痕量锰的研究

研究了在碱性介质中，以邻菲啰啉为活化剂，锰（Ⅱ）催化高碘酸钾氧化苯酚红褪色指示反应及其动力学条件，建立了测定痕量锰的新方法。锰的浓度在０～０．０７μｇ／ｍＬ范围内为线性关系，检测限为３．０ｎｇ／ｍＬ。用于盐酸试剂中痕量锰的测定，结果良好。     

孔雀绿电极催化电位滴定法测定中草药中的锰

以氨三乙酸存在下锰（Ⅱ）催化高碘酸钾氧化孔雀绿的反应作指示反应，用孔雀绿选择性电极作指示电极，对于用催化电位滴定法测定微量锰进行了研究，选择了适宜的实验条件，并测定了中草药中的锰的含量，所得结果与原子吸收法一致。     

在镍和溴化十六烷基三甲铵微乳液作用下二安替比林对溴苯基甲烷与锰(Ⅳ)的显色反应

１　引　言锰是人体生命活动中极为重要的微量元素，锰的摄入主要通过食物，因而准确测定食品中锰的含量具有重要意义。锰的测定常用高锰酸盐光度法，该法灵敏度较低。二安替比林苯基甲烷类试剂与锰（Ⅶ）的显色反应具有很高灵敏度，但稳定性和选择性不太好。为了提高该类型显色剂与锰显色反应的选择性，我们研究了在碱性介质中空气氧化锰（Ⅱ）为锰（Ⅳ）后，在镍和溴化十六烷基三甲铵（ＣＴＭＡＢ）微乳液协同作用下，锰（Ⅳ）与二安替比林对溴苯基甲烷（ＤＡｐＢＭ）的显色反应。体系选择性比ＤＡｐＢＭ与锰（Ⅶ）的显色反应有改善，方法…     

催化动力学电位法测定微量锰的研究

用结晶紫选择性电极（自制）以催化电位法对测定微量锰进行了研究。该方法测定标的线性范围为７～７４μｇ／Ｌ，对标准钢样中的锰含量测定结果满意，且操作方便。     

催化动力学光度法测定痕量锰

基于在弱酸介质中，锰（Ⅱ）催化高碘酸钾氧化亮禄的反应，建立了动力学分光光度法测定痕量锰的新方法。方法的检出限为８．５６×１０＾－１０ｇ／ｍＬ，测定线性范围为０－０．６μｇ／２５ｍＬ。直接用于化学试剂、大米、面粉、人发和水样中锰的测定，均获得满意的结果。     

火焰原子吸收光谱法测定预混合饲料及浓缩饲料中的高含量锰

以锰280．1nm次灵敏线作为分析谱线，用原子吸收光谱法测定预混合饲料和浓缩饲料中的高含量锰。锰的线性范围为0～12μg／mL，相关系数r=0．9994，相对标准偏差小于l％，回收率为97％～102％。该方法的测定结果与常规灵敏线原子吸收光谱法的测定结果基本一致。     

耐尔蓝A在银溶胶上的表面增强拉曼光谱特征

研究了在不同耐尔蓝Ａ浓度，银溶胶，激发波长和ｐＨ值以及碘离子存在下，耐尔蓝Ａ在银溶胶上的表面增强拉曼光谱特征。     

Engineered Nanomaterial Assisted Signal‐amplification Strategies for Enhancing Analytical Performance of Electrochemical Biosensors

The design and development of modern biosensors for sensitive and selective detection of various biomarkers is important in diversified arenas including healthcare, environment, and food industries etc. The requirement of more robust and reliant biosensors lead to the development of various sensing modules. The nanomaterials having specific optical, electrical, and mechanical strength can pave the way towards development of ultrafast, robust, and miniaturized modules for biosensors. It can provide not only the point‐of‐care applicability but also has tremendous commercial as well as industrial justification. In order to improve the performance of the sensor systems, various nanostructure materials have been readily studied and applied for development of novel biosensors. In the last few years, researchers are engaged on harnessing the unique atomic and molecular properties of advance‐engineered materials including carbon nanotubes, graphene nanosheets, metal nanoparticles, metal oxide nanoparticles, and their nano‐conjugates. In view of such recent developments in nanomaterial engineering, the current review has been formulated emphasizing the role of these materials in surface engineering, biomolecule conjugation, and signal amplification for development of various ultrasensitive and robust biosensors having commercial as well as industrial viability. Attention is given on the electrochemical biosensors incorporating various nanomaterials and their conjugates. Importance of nanomaterials in the analytical performance of the various biosensor has also been discussed. To put a perceptive insights on the importance of various nanomaterials, an extended table is incorporated, which includes probe design, analyte, LOD, and dynamic range of various electrochemical biosensors.     

利用pH-电位-稳定性图分析含水聚合物电解质膜电化学反应器中贵金属和阀金属元素的稳定性

根据对含水聚合物电解质膜(PEM)电化学反应器中各种界面电位变化范围的分析, 可以推知各种此类电化学反应器中的固/水界面电位的变化范围. 据此可根据各种材料的pH-电位图构筑pH-电位-稳定性图, 用于分析这类反应器中各类材料的稳定性. 介绍了构筑pH-电位-稳定性图的方法, 并根据各种贵金属元素和阀金属元素的pH-电位-稳定性图, 分析了它们在各类含水PEM电化学反应器中用作催化材料或结构材料时的稳定性.     

A review on industrial wastewater treatment via electrocoagulation processes

Every year, a large amount of wastewater is discharged from various industries into the environment, and various methods are used to treat wastewater to reduce the amount of pollutants. Electrocoagulation (EC) is an electrochemically based technique that generates coagulant species in situ from the electrodissolution of sacrificial anodes, usually made of iron or aluminum destabilizes suspended, dissolved, or emulsified pollutants by using an electric current. It has a potential in removing various kinds of pollutants including organic and inorganic contaminants for various types of wastewater. The effectiveness of EC process depends on various parameters including pH, electrode, operation time, and current density. The goal of this study is to review the most relevant literatures that were published recently. The main challenges associated with the EC process are electrode passivation and energy consumption. EC compared with other common methods has advantages such as reducing energy consumption and reducing operating costs.     

Synthesis of new polyaza heterocycles. Part 42: Diazines

Using Pd-catalyzed Stille cross-coupling reactions, we report here the synthesis of various mono- or bis(tri-n-butylstannyl)diazines which were reacted with various halogenated diazines to access to various polyaza heterocyclic derivatives.     

六味地黄丸的精细指纹图谱分析及模式识别分类研究

采用高效液相色谱建立了六味地黄丸的指纹图谱,对两个厂家的16批产品进行了测定,并结合中药相似度软件和主成分分析法对全指纹图谱和其精细指纹图谱进行了模式识别研究。结果表明,中药相似度软件能够对不同厂家的产品进行区分但也可能造成误判;在主成分分析法的投影图中,两个厂家的产品明显聚为两类,而且不同批次产品的差异也能够显示出来。     

An easy access to novel steroidal dispiropyrrolidines through 1,3-dipolar cycloaddition of azomethine ylides

A facile one-pot synthesis of novel steroidal dispiropyrrolidines has been accomplished by 1,3-dipolar cycloaddition reaction of various azomethine ylides derived from isatin/acenaphthenequinone/ninhydrin and sarcosine with various estrone derivatives as dipolarophiles, in good yield. The effect of various solvents on the 1,3-dipolar cycloaddition reaction are also studied.     

Smart polymer grafted silica based drug delivery systems

Smart polymers are a special class of polymers, which respond to the various external stimuli by changing their properties. Recent developments in synthetic polymer chemistry have provided the possibility of designing and synthesis of various new stimuli-responsive polymers. These stimuli-responsive polymers can be used to prepare smart drug delivery systems (DDS) by grafting them on various nanomaterials. The main aim of this review is to present collective information on various stimuli-responsive polymers grafted on silica nanoparticles for the preparation of smart DDS. The stimuli covered are pH, temperature, redox, reactive oxygen species (ROS), glucose concentration, enzymes, magnetic field, and so forth. The structures of various stimuli-responsive polymers are shown with their relevance to the preparation of smart DDS. The crucial roles of macromolecular design and synthesis of smart polymers in the development of stimuli-responsive DDS are discussed with examples from literature and the challenges that still exist in this area of research are presented.     

Dye and its removal from aqueous solution by adsorption: A review

In this review article the authors presented up to-date development on the application of adsorption in the removal of dyes from aqueous solution. This review article provides extensive literature information about dyes, its classification and toxicity, various treatment methods, and dye adsorption characteristics by various adsorbents. One of the objectives of this review article is to organise the scattered available information on various aspects on a wide range of potentially effective adsorbents in the removal of dyes. Therefore, an extensive list of various adsorbents such as natural materials, waste materials from industry, agricultural by-products, and biomass based activated carbon in the removal of various dyes has been compiled here. Dye bearing waste treatment by adsorption using low cost alternative adsorbent is a demanding area as it has double benefits i.e. water treatment and waste management. Further, activated carbon from biomass has the advantage of offering an effected low cost replacement for non-renewable coal based granular activated carbon provided that they have similar or better adsorption on efficiency. The effectiveness of various adsorbents under different physico-chemical process parameters and their comparative adsorption capacity towards dye adsorption has also been presented. This review paper also includes the affective adsorption factors of dye such as solution pH, initial dye concentration, adsorbent dosage, and temperature. The applicability of various adsorption kinetic models and isotherm models for dye removal by wide range of adsorbents is also reported here. Conclusions have been drawn from the literature reviewed and few suggestions for future research are proposed.     

Analysing of <Superscript>228</Superscript>Th, <Superscript>232</Superscript>Th, <Superscript>228</Superscript>Ra in human bone tissues for the purpose of determining the post mortal interval

The adsorption of Cs on clayey materials such as bentonite and Na-montmorillonite was studied in various electrolytic conditions (concentration and composition), various solid to liquid ratios and various pH conditions. The results obtained for these different conditions were modeled considering an exchange model associated to the surface complexation concept. Then, the same approach was considered to model the sorption of Rb, which have the same chemical behavior than Cs. Experiments were carried out for various electrolyte, pH, and Rb concentrations. The stoichiometries corresponding to the sorption of Rb on bentonite and montmorillonite were then deduced from the experimental results.