氰离子选择电极的制备和性能测定

氰离子选择电极的制备和应用虽有不少报导,但一般灵敏度较低,仅适用于氰离子含量较高的废水或其它样品分析,尚难满足氰离子含量较低的天然水分析的要求。我们制作的碘化银敏感膜氰离子选择电极,检测下限达到1×10~(-7)MCN-,线性范围1×10~(-1)—5×10~(-7)MCN-,性能稳定,可用于水和废水中氰离子浓度的测定。 (一)试剂和仪器     

硫离子选择性电极的分析性能试验

本文报告本实验室试制的HDS-1及HDS-2型硫离子选择性电极的分析性能测试结果。银及硫离子的实际可测下限均约为10~-5M。加入抗坏血酸可使低浓度硫化物溶液稳定,拟定了用电极法测定溶液中硫化物的操作步骤,绝大部分常见阴离子对测定无显著影响。     

新型硫醇硫组合电极研制及性能测试

把玻璃参比电极、环状的银-硫化银指示电极、以及铂丝屏蔽电极组合形成新型硫醇硫组合电极,研究了在含有0.2 mol/L硫离子的醇-水-氨介质中,在表面活性剂存在下,以环状银电极为阳极,恒定微电流电沉积的方式制备硫化银敏感层的条件。由此法制得的新型硫醇硫组合电极在Ag 浓度为1.0×10-1~1.0×10-5mol/L范围内斜率为59.0±0.5 mV/pC,测量下限为2.2×10-6mol/L,与同类商品电极相比,响应速度快、记忆效应小、重复性好、电位稳定,易于批量生产,具有较强的适应性和应用价值。     

用硫离子选择电极测定硫氰共渗盐浴中游离硫离子

本文提出了用硫离子选择电极测定硫氰共渗盐浴中游离硫离子的直接电位法。对硫氰共渗盐浴中游离硫离子的测定下限为0.000020%。方法简单、快速,可靠及无污染。标准加料试验的回收率为90—105%,相对偏差不大于15%。     

离子选择电极

本文综述了1986年9月以来我国离子选择电极研究和应用方面的情况,内容涉及基础理论研究.电极分析技术,不同类型的电极,生物传感器和电极在自动分析中的应用等各个领域。引用参考文献631篇。     

离子选择电极

离子选择电极近年来发展十分迅速。有人统计其应用范围的增长仅次于色谱。自1969年以来,国外陆续出版了关于离子选择电极的专著。其中有两本已有中译本。化学、分析化学期刊中有关介绍日益增多,资料收集文献较广。我国早在50年代,就有人从事离子电极的工作。70年代以来,在有关会     

碘离子选择电极的制备和应用

碘离子选择电极,在1961年由 Pungor 等人制成,是用碘化银粉掺入熔融的石蜡中做成的一种膜。后来 Pungor 继续报导了一些沉淀填充膜电极。Rechnitz 等人研究了碘化银-硅橡胶膜电极在分析中的应用,指出这种电极在溶液化学测量中应用的可能性。Arino 和 Kramer 用碘离子选择电极对高放射性溶液中Ⅰ~(-131)和Ⅰ~(-125)的测定。Carter 用碘电极在临床试验中测定血液中含碘量。     

十二烷基二甲基苄基溴化铵离子选择电极的制备与性能

以四苯硼钠作为电活性物质,用溶胶-凝胶方法制备的阳离子表面活性剂离子选择电极对十二烷基二甲基苄基溴化铵具有良好的能斯特响应特性,其线性响应范围为1.0×10-3~1.58×10-6mol·L-1,斜率为57.8mV/pc(pc=-logc),适宜的pH范围为4.0~10.0.同时该电极显示了较好的选择性,重现性和稳定性.用该电极对十二烷基二甲基苄基溴化铵进行了回收率试验,效果很好,对其溶液试样进行了分析,结果和标准方法一致.     

氟离子选择电极的试制及其性能

氟离子选择电极于1966年提出,系用氟化镧单晶薄膜制成,此后除同类电极外,又有不均态薄膜电极。LaF_3单晶电极,由于其灵敏度高,操作简便,干扰较少,并能在连续自动分析中使用,颇受分析工作者的重视。有关氟离子选择电极文献介绍很多。我们本着“自力更生”的方针,利用     

733型碘离子选择电极的制备、分析性能与应用

有关碘离子选择电极的工作已有不少报导,我们试制的733型碘电极经长期试用,表明电极性能良好,能用于一些常规分析工作。     

A Heterogeneous Precipitate Based Mn(Ii) Coated Wire Ion-Selective Electrode

Abstract

A new heterogeneous Mn(II) ion selective coated wire electrode (CWISE) based on tetrapyridine Mn(II) thiocynanate as electroactive material has been described. the working pH range of the electrode is 2.3 to 8.8. the electrode shows a linear response in the concentration range 1.0×10^?1M to 1.0×10^?6M. the response time of the electrode is 35 sec. the selectivity coefficient for different cations determined by mixed solution method are:

Fe²⁺(0.05), Cd²⁺(0.05), Ni²⁺(0.01), Co²⁺(0.5), Pb²⁺(0.5), Hg²⁺(0.05), Sn²⁺(0), Zn²⁺(0)

The electrode can be used for the electrometeric determination of Mn(II) ion.     

Preparation and Application Ion-Selective Electrode of Lomefloxacin

Lomefloxacin is an antibacterial agent of the 4-quinolone group with a broad spectrum of activity against Gram-positive and Gram-negative bacteria and has been widely used in clinical therapy⑴.Many methods have been used to determine Lomefloxacin, including UV-V1S, HPLC,fluorimetry. The aim of this paper is to report the preparation and the performance characteristics of lomefloxacin PVC coated carbon rod electrode.     

平痛新离子选择电极的研制及应用

盐酸平痛新是一种新型的无依赖性镇痛药物。其含量测定有紫外分光光度法、滴定法、酸性染料比色法等方法。本文以盐酸平痛新与硫氰酸铬酸形成的缔合物为电活性物制备了 PVC膜盐酸平痛新离子选择性电极 ,并用此电极对盐酸平痛新片的含量进行了测定 ,结果与紫外分光光度法相符。     

诺氟沙星离子选择性电极的研制和应用

研究了诺氟沙星选择电极的制备方法,将该电极应用于诺氟沙星胶囊制剂的测定。在ＮａＡｃ－ＨＡｃ（ｐＨ４．０）底液中,电极响应的线性范围为１．０×１０＾－４￣１．０×１０＾－２ｍｏｌ·Ｌ＾－１,七次测定的标示量百分含量的平均值为９４％,与药典法测定结果基本一致,相对标准偏差为１．０％。     

Ion-Selective Electrode for the Determination of Sulfadimezine

The main electroanalytical properties of ion-selective electrodes for determining sulfadimezine were studied. Quaternary ammonium salts containing different functional substituents were tested as ionophore groups in ion exchangers. The association constants of ionophores in membrane media, solubility products, and partition coefficients in the aqueous solution–membrane solvent system were calculated.     

基于Ag/AgCl丝双涂膜曲马多离子选择电极的研制与应用

以Ag/AgCl丝为基体依次外涂含0.1mol/LKCl的琼脂凝胶膜及含四苯硼 曲马多缔合物的PVC膜,制备了一种双涂膜曲马多离子选择电极。该电极的线性范围为2.5×10-5～1.0×10-2mol/L,斜率为57.3mV/pc,检出限为1.6×10-5mol/L,性能稳定,体积微小,能用于盐酸曲马多制剂的含量测定。     

Ion-Selective Electrode for the Determination of Furaltadone

ABSTRACT

A Furaltadone (FD) ion-selective PVC membrane electrode based on the ion-pair complex of FD with sodium tetraphenylborate was prepared with dioctyl phthalate as a plasticiser. The electrode exhibits a linear response with an approximate Nernstian slope (50 mV decade^?1 at 20 ⁰C) with the concentration range 2.18 x 10^?5–2.18 x 10^?4 FD. The effects of ionic strength and pH of the test solution on the electrode performance were studied. The electrode exhibited very good selectivity for FD with respect to a large number of inorganic and organic cations of biological importance. The standard addition method and potentiometric titration were used to determine the FD in pure solution and in pharmaceutical preparations with satisfactory results.     

一种全固态扑尔敏电极的研制

制备了以脲醛树脂为框架，以ＫＣｌ粉末为活性组分的Ａｇ／ＡｇＣｌ固体电极。结果表明该电极具有相当好的稳定性并能用于扑尔敏制剂的含量测定。     

以碳电极为基体的聚氯乙烯膜铋离子选择电极的研制与应用

铋是得乐、胃必治等胃药的主要成分，其含量测定方法有用中国药典法、吸光光度法、等离子体发射光谱法等。本文利用铋离子可与碘离子形成稳定的配合物，且该配合物又能与胺类物质生成沉淀，报道了以六碘合铋配离子与曲马多缔合物为电活性物的涂碳式聚氯乙烯膜铋离子选择电极，并用此电极以标准曲线法对枸橼酸铋钾胶囊进行了测定，此法简便，结果与药典法相符。     

Nafion Coated Silver Amalgam Electrode for Determination of Trace Metals by Anodic Stripping Voltammetry

This paper describes characterization and application of Nafion coated solid silver amalgam electrodes to prevent surface fouling of surfactants in determination of trace metals by differential pulse anodic stripping voltammetry (DPASV). Polymer films of different thickness were tested using Nafion solutions in the range 0.25%–1%. Optimum thickness was archived using a 0.5% Nafion solution, resulting in both increased response and stability over time compared to uncoated electrodes. The influence of model surface active macromolecules was studied using triton X‐100, sodium dodecyl sulfate, dodecyl pyridinium chloride and bovine serum albumin as representatives for surfactants. The resistance to surfactants makes the studied Nafion coated solid silver amalgam electrodes an interesting alternative for practical use in environmental monitoring.