MC98-A型多功能极谱仪研制

以８０９８单片机作智能部件的小型多功能极谱仪，采用ＳＴＤ标准总线结构，汉字菜单式提示，人－机对话方式操作。以阳极溶出和电位溶出分析为主，用三种定量分析方法直接显示，打印出测试曲线和分析结果。     

电位溶出装置的组装及其性能测试

利用实验室中原有的设备组装电位溶出装置，用于教学实验可直观地诠释电位溶出法的基本原理。操作简单，教学效果良好。     

简易电解池—改换介质—阳极溶出伏安法

采用自制的简易电解池，以圆盘旋转玻碳电极为工作电极，用于阳极溶出伏安法改换溶出介质的可行性研究。以同时测定Ｃｕ（Ⅱ），Ｓｂ（Ⅲ）为例，试验了改换溶出介质的条件。此方法用于矿样中铜和锑的同时测定，结果满意。     

阳极溶出催化伏安法的理论研究 Ⅱ.不可逆电极溶出

本文对在玻璃碳电极上不可逆溶出催化的理论进行了研究,推导了溶出催化过程的电流方程,峰电流和峰电势方程,并用微计算机模拟出各种关系曲线,从理论方程得知溶出催化伏安法所得的峰电流比溶出伏安法的峰电流提高了二个数量级。本文还用钯的溶出催化实验验证理论方程,所得的实验结果均与理论方程相吻合。     

阳极溶出催化伏安法的理论研究 Ⅰ.可逆电极溶出

本文推导了玻璃碳电极上可逆溶出催化过程的理论电流方程、峰电流及峰电势方程,得知溶出催化伏安法所得的峰电流比溶出伏安法的峰电流提高了数十倍,从而进一步提高了溶出伏安法的灵敏度。本文还用碲的溶出催化实验验证理论方程。所得实验结果均与理论方程相吻合。     

超微盘电极上电位溶出分析法理论

本文提出了超微盘电极上电位溶出分析法理论,内容包括:过渡时间(τ)方程式、电位(E)-时间(t)曲线方程式及微分电位溶出分析法dt/dE-E曲线方程式,并对该曲线的性质进行了论述。     

土霉素的电化学还原和吸附溶出伏安法测定研究

本文叙述吸附溶出分析土霉素的灵敏方法。土霉素及其质子化形态能在汞电极表面吸附富集(-0.60V vsAg/AgCl),溶出峰的数目及电位受pH影响。在pH4—8的溶液中得到4个溶出峰,而在强酸性和碱性介质中仅得到一个主峰。文中讨论了有关的化学和电极反应机理。采用奥氏方波溶出,电解富集5 min的测定限为5×10~(-10)mol/L。     

电位溶出分析法测定食醋中微量铅

我县有大小醋厂数十家,为了对全县生产食醋中的铅进行监测,寻找一种方便、快速的测定方法十分必要。我们用MP-1型溶出分析仪对食醋中微量铅进行测定,取得满意结果。该法具有操作简便、快速、灵敏度高、准确度好等优点,适合大批样品分析。 1 试验部分 1.1 仪器与试剂 MP-1型溶出分析仪 JCZ-A型旋转玻碳电极 饱和甘汞电极和铂电极 微量进样器:0.5～5μl(上海医用激光仪器厂),误差小于5％。 镀汞液:用硝酸汞配成含汞40mg·L~(-1)的1％硝酸溶液 铅标准液;10.0μg·ml~(-1) 试剂均为分析纯;试验用水为石英亚沸蒸馏水 1.2试验方法 1.2.1 玻碳电极预镀汞膜     

碘离子对铜阳极溶出的影响

本文用阳极溶出伏安法直接在玻璃电极上测定铜。在Ｈ２ＳＯ４介质中加入微量碘离子使灵敏度大大提高，可测定１ｎｇ／ｍＬ铜。该方法用于人体血清中铜的测定，结果令人满意，证明在碘离子存在下，铜溶出时生成了碘化亚铜沉淀，加速了溶出反应的进行，利用溶度积的关系来提高阳极溶出伏安法的灵敏度，是一种有效的方法。     

铅在铂电极上的还原电位溶出分析法

研究了以亚铁氰化钾为还原剂铅在铂电极上的还原电位溶出法；讨论了电极的预处理、阳极富集和随后的还原电位溶出及铅测定的干扰。     

Analysis and speciation of arsenic by stripping potentiometry: a review

This paper provides a review that summarizes several examples of the literature from 1980 to 2003, to illustrate the applications of stripping potentiometry for the determination and speciation of arsenic in several samples. A discussion on the main advantages of stripping potentiometry in comparison with other electrochemical methods employed for arsenic determination is presented. Special attention is devoted to stripping modes (constant current or chemical stripping) and to issues related to the choice of working electrodes and supporting electrolyte. This approach has been also applied at arsenic determination in flow systems. A section is dedicated to speciation of arsenic and total arsenic determination and other to analytical characteristic of method and their interferences. An extensive compilation, organize by experimental and analytical parameters and real sample studied is presented.     

毛细管电泳多脉冲溶出安培检测方法的研究

 摘要：将用于电化学检测的三电极与驱动电泳分离的电化学系统的接地电极在毛细管出口处的外面作适当的布置,可最大程度地减少高压电场对安培检测的干扰。多阶脉冲溶出安培检测方式提高了电流检测灵敏度,并可在一定程度上通过不同的溶出电位鉴别分离组分。将该方法应用于铜、锌、铅、铊、镉等离子的毛细管电泳分离,得到了较满意的结果。     

Studies on Alternating Pulse Current-ChronopotentiometricStripping Analysis

BasedonthefirstideaspresentedbyBeck',anewmethodcalledalternatingpulsecurrent-chronopotentiometricstrippinganalysis(APC-CPSA)hasbeendeveloped.Inthistechnique,duringthestrippingstepthecurrentimposedontheelectrol,ysi$cellcomprisesofanalternatingpulsecurrent(APC)andtheinherentdirectcurrentofCPSA.TheAPCisoperatedwithahighfrequencyinasquarewavemode.isandiRisdefinedastheanodicandcathodicpulsecurrent,respectively,isandtRisthetimeforwhichthesecurrentsflow.So,whenisandiRalternates,partsofthestri…     

Determination of Thiols and Disulfides in Whole Blood and Its Fractions by Anodic Stripping Voltammetry and Anodic Stripping Voltammetric Titration

SH‐ and SS‐groups content and their ratio is one of the most important factors of organism antioxidant system. Change in ratio of thiols to disulfides can serve as an indicator of oxidative stress. Anodic stripping voltammetry and anodic stripping voltammetric titration (direct and reverse variants) methods are proposed for determination of thiols and disulfides concentration. Disulfides are preliminary reduced with sodium sulfite. Ag⁺+RSH→AgSR+H⁺ reaction is used to provide the information. Unreacted silver ions concentration is determined by anodic stripping voltammetry method using platinum working electrode. Calibration free method is suggested. The possibilities of express analysis of blood and its fractions are described. Reliability of results and accuracy are confirmed by model solutions analysis and recovery study of whole blood and its fractions. Results of whole blood, erythrocyte mass, plasma and serum taken from different groups of patients' investigations are given, that demonstrate perspectives of the application methods in clinical practice.     

Signal enhancement in adsorptive stripping voltammetry of Pt by forced convection during the measurement step

Adsorptive stripping voltammetry (‘formazone-method’) is already known as one of the most sensitive methods for platinum analysis with a detection limit in the low picograms range. In this work, it is shown that the detection limit can be lowered even more by one order of magnitude to 0.2 pg (=1 fmol) Pt in 15 mL electrolyte, corresponding to 68 fmol/L, by applying forced convection during the stripping step of the voltammetric measurement. The sensitivity of the method (given in nA/pg Pt) is enhanced by a factor of 3-5 (in differential pulse mode and 15 mL vial), up to a factor of 30 (using square-wave mode and 3 mL vial). The maximum enhancement factor is limited by the maximum stirrer speed, which can be applied without negative effects on the hanging mercury drop electrode.To check for similar enhancement effects in other types of stripping methods, the behaviour of adsorptive stripping voltammetry for Pt is compared to conventional anodic stripping voltammetry (ASV) of lead, and to adsorptive stripping voltammetry of nickel and cobalt using their dimethylglyoxime (DMG) complexes. No enhancement effect is observed in ASV of lead upon stirring, and the nickel-DMG-system exhibits only a smaller enhancement factor of about 1.5. A reasonable explanation of the higher signal enhancement in the catalytic Pt-formazone-system is the mass transport of reaction products, namely hydrogen, away from the working electrode during the catalytic hydrogen evolution cycle.     

Optimization and validation of an automated voltammetric stripping technique for ultratrace metal analysis

A new automated batch method for the determination of ultratrace metals (nanogram per liter level) was developed and validated. Instrumental and chemical parameters affecting the performance of the method were carefully assessed and optimized. A wide range of voltammetric methods under different chemical conditions were tested. Cadmium, lead and copper were determined by anodic stripping voltammetry (ASV), while nickel, cobalt, rhodium and uranium by adsorptive cathodic stripping voltammetry (AdCSV). The figures of merit of all of these methods were determined: very good precision and accuracy were achieved, e.g. relative percentage standard deviation in the 4-13% for ASV and 2-5% for AdCSV.The stripping methods were applied to the determination of cadmium, lead, copper, nickel, cobalt, rhodium and uranium in lake water samples and the results were found to be comparable with ICP-MS data.     

微电极电位溶出法研究进展

本文介绍用于电位溶出分析（ＰＳＡ）的固体微电极的种类及制作，综述了该领域研究的理论进展、技术应用及其方法的优越性，引用文献４１篇     

A Potentiometric Stripping Analyzer for Multianalyte Screening

The paper describes a simple and low‐cost multisensing instrument based on neural network to monitor multiple environmentally significant metals in solution by implementing the potentiometric stripping analysis technique. Our analyzer consists of a measuring unit, implemented on a lap‐top/notebook computer equipped with a simple electronic circuitry, and a reusable sensor, based on glassy‐carbon technology. The current system has been characterized with synthetic samples containing different concentrations of lead, copper, cadmium and zinc, showing detection limits suitable for the first monitoring of metal traces. A linear relationship between peak area and concentration has been observed for all tested metals. Therefore, a simple linear regression can be used by the analyzer to determine the actual metal concentration from the PSA peak area. The presence of a second metal or of a real matrix, often, interferes with stripping measurements in different ways: compounds with oxidation potentials close to that of the analytes of interest may interfere if the instrument does not have sufficient resolution to resolve the overlapping PSA peaks; species which form intermetallic compounds with the analytes may result in erroneously low analyte concentration readings, since the oxidation potential of the intermetallic compound is rarely near that of the original analyte. In order to overcome these problems, the described analyzer has been integrated with a Neural Network algorithm, able to separate the different contributions, after a proper training.     

Studies on substituted phenols by differential pulse cathodic stripping voltammetry: 1. Pentachlorophenol

A study of chlorophenols using differential pulse cathodic stripping voltammetry (dpcsv) is reported. Of the wide range of chlorophenols investigated, only pentachlorophenol and 2,3,4,6-tetrachlorophenol yield stripping peaks.For pentachlorophenol in water, two peaks are obtained at stripping potentials of –1.2 V and –1.58 V versus SCE. In methanol, pentachlorophenol shows one peak with a stripping potential at –1.6 V versus SCE.In the case of 2,3,4,6-tetrachlorophenol in water, two peaks are observed at –1.06 V and –1.6 V versus SCE, while in methanol only one peak arises at a stripping potential of –1.6 V. A procedure was developed for the determination of pentachlorophenol in natural waters.