混合型中性载体PVC膜pH电极的研究

本文以菸酸十八烷基酯和二辛基十八胺两性载体混合研制成ＰＶＣ膜ＰＨ电极，采用正交实验设计优化了电极的膜组成，测得电极的ＰＨ线性响应范围为１．８－１２．１，秦为５５．６ｍＶ／ｐＨ（１８℃），获得满意结果。     

脂溶性酞菁钴(III)为载体的高选择性亚硝酸根PVC膜电极

以自制的4,4',4',4''-四特丁基酞菁钴(II)为原料合成二氯4,4',4',4''-四特丁基酞菁钴(III)。以此为载体制备PVC膜电极。该电极的电位选择性次序明显不同于Hofmeister次序, 其最佳 响应斜率为-52mV/pNO2^-, 线性范围为3×10^-^5～1×10^-^1mol.dm^-^3NaNO2。通过改变配合物轴向的配位阴离子, 用紫外-可见光谱法对电极的响应机理作了初步探讨。     

脂溶性酞菁钴(III)为载体的高选择性亚硝酸根PVC膜电极

以自制的4,4',4',4''-四特丁基酞菁钴(II)为原料合成二氯4,4',4',4''-四特丁基酞菁钴(III)。以此为载体制备PVC膜电极。该电极的电位选择性次序明显不同于Hofmeister次序, 其最佳 响应斜率为-52mV/pNO2^-, 线性范围为3×10^-^5～1×10^-^1mol.dm^-^3NaNO2。通过改变配合物轴向的配位阴离子, 用紫外-可见光谱法对电极的响应机理作了初步探讨。     

一种新的适合低pH范围的中性载体PVC膜电极的研究

设计并合成了Ｎ－十八烷基水杨醛亚胺（ＯＤＳＡＩ）,Ｎ－十八烷基苯甲醛亚胺（ＯＤＢＡＩ）两种新的亚胺化合物,并以此为中性载体,制成了ＰＶＣ膜ＰＨ电极。此电极在ＰＨ０．６－８．５的范围内,对氢离子呈现很的能斯响应,电极斜率为５２ｍＶ／ｐＨ。     

以钴Schiff碱配合物为载体的PVC膜碘离子选择性电极的研究

以钴Ｓｃｈｉｆｆ碱配合物为载体的ＰＶＣ膜碘离子选择性电极的研究刘冬，袁若，陈文灿，柴雅琴，高德，李俊忠，俞汝勤（湖南大学化学化工系，长沙，４１００８２）关键词　载体，双苯甲酰丙酮缩乙二亚胺合钴（Ⅱ），碘离子选择性电极季铵盐型阴离子选择性电极因其电位选...     

金属酞菁类LB膜的研究进展

本文综述了金属酞菁类化合物的基本性质及其衍生物LB膜的成膜性、取向性、导电性、气敏性和在分子电子器件方面的应用。     

酞菁钯-PVC膜硫氰酸根离子选择性电极的研制及应用

研制了酞菁钯 PVC膜硫氰酸根离子选择性电极。在B.R缓冲体系(pH2.5)中,电极对SCN-离子响应的线性范围为1.0×10-5～0.1mol·L-1,检出限为7.28×10-6mol·L-1,斜率为56±1mV,电极具有良好的选择性和稳定性。用于印染厂废水中SCN-的测定,结果满意。     

以不对称长链叔胺为中性载体的PVC膜PH电极的研究

合成了一系列不对称长链叔胺类化合物作中性载体，研制成ＰＶＣ膜ｐＨ电极。其中（２－羟基苄基）二正癸胺、（β－氰乙基）ＬＡ－２、（２－羟基苄基）ＬＡ－２的电极线性范围分别为ｐＨ２．５～１２．５、ｐＨ２．５～１２．５、ｐＨ３．０～１２．５，斜率分别为５６．６±０．４ｍＶ／ｐＨ、５６．３±０．７ｍＶ／ｐＨ、５５．９±０．３ｍＶ／ｐＨ（３０℃）。这些ｐＨ电极内阻低，响应速度快，性能较稳定，可用于血清样中的ｐＨ值测量。此外，以（２－羟基辛基）ＬＡ－２为载体可制成流通式ＰＶＣ膜ｐＨ内电极型氨气敏电极。     

新型载体PVC膜水杨酸根离子敏感电极的研制与应用

报导了以三苄基锡酸酯为中性载体的一种溶剂聚合膜阴离子敏感电极的研制。该电极对水杨酸根离子的电位响具有优良的选择和灵敏度。     

新型PVC膜涂丝诺氟沙星选择电极的研制与应用

制备了一种稳定性和重现性均良好的新型PVC膜涂丝诺氟沙星选择电极 ,该电极是以Ag/AgCl丝为基体 ,在其表面先涂一层含Cl-的脲醛树脂 ,然后再涂一层含硅钨酸 -诺氟沙星离子缔合物的PVC膜。采用正交设计法 ,研究了离子缔合物的种类、活性物在膜中的含量及增塑剂3因素对电极的影响。电极的线性范围为7.9×10 -5～1.0×10 -2mol·L -1 ,检出限为2.5×10 -5mol·L -1,斜率为35.7mV/decade(30℃) ,可直接用于诺氟沙星胶囊的含量测定 ,回收率为99 %～102 % ,结果与中国药典法基本一致。     

酞菁金属配合物的合成及光谱特性研究

以4-叔丁基邻苯二甲酸酐、金属（Co3+、Al3+、Zn2+）氯化物、尿素、钼酸铵为原料,用固相合成法分别合成系列酞菁类金属配合物（MPc）。通过目标产物的红外谱图和紫外图,确定形成MPc;对合成的MPc的紫外可见吸收、荧光光谱特性进行研究,考察溶剂、浓度、中心金属对MPc化合物的光谱特性的影响,为光谱理论理解和实验教学提供桥梁。     

Flow-Through Sandwich PVC Matrix Membrane Electrode for Flow Injection Analysis

Abstract

A flow-through sandwich potentiometric detector for FIA in which a PVC membrane sensor is applied on a conductive epoxy support is described. It allows simple replacement of the membrane when exhausted or substituition of the sensor system and shows good mechanical and electric stability. The device can be easily included in a block with a location for the reference electrode. The detector was activated with a commercial sensor selective to nitrate and its behaviour in FIA was studied. A comparison of its perfomance with that of a nitrate selective electrode of classic shape constructed by the same technique is presented.     

Construction and Application of a PVC Membrane Enoxacin Ion－selective Electrode Based on a Needle－shaped Inner Reference Electrode

IntroductionPVC membrane- coated- wire electrodes areused in the analytical field widely. They are pre-pared usually with platinum wire,silver wire orgraphite rod coated with a PVC thin membranecontaining various active components and plasticiz-ers[1— 3 ] .The electrodes have no inner KCl solutionand they are notinfluenced by the sample pressure.Furthermore,they are free from directional selec-tivity when they are installed,and they can be mi-crominiaturized easily. The shortcomings of th…     

Asymmetrical Schiff Bases as Carriers in PVC Membrane Electrodes for Cadmium (II) Ions

5‐[((4‐Methyl phenyl) azo)‐N‐(6‐amino‐2‐pyridin) salicylaldimine] (S₁), and 5‐[((4‐methyl phenyl) azo)‐N‐(2‐diamino‐2‐cyano‐1‐ethyl cyanide) salicylaldehyde] (S₂) with N and O donor atoms are effective ionophores to make Cd²⁺‐selective membrane electrodes. The electrodes based on S₁ and S₂ exhibits a Nernstian or near‐Nernstian response for cadmium ion over a wide concentration range 1.5×10^?1–7.5×10^?7 with a slope of 28 and 2.0×10^?1–4.0×10^?7 with a slope of 22, respectively. They have quick response and can be used for three or four months without any divergence in potential. The proposed sensors show fairly good selectivity over some alkali, alkaline earth, transition and heavy metal ions. The electrodes based on S₁ and S₂ can be used in the pH range 3.5–9. These electrodes were used as an indicator electrode in potentiometric titration of cadmium ion with EDTA and in the direct determination of cadmium ion in aqueous solutions.     

PVC膜氯离子选择电极的临床应用研究

本文介绍利用功能高分子活性材料,采用熔融压片成膜的方法研制了PVC膜氯离子选择电极,并对电极性能进行测试并做了临床应用试验,结果表明:电极在10~(-1)M Cl~-中稳定性好,响应时间快,在10~(-1)～10~(-4)M Cl~-中电极呈能斯特响应,其斜率为56～57mV/pCl~-。经临床检测血液标本,该电极抗蛋白、脂类、血球能力强,可以满足临床检测的要求。     

基于N-十二酰基-l-脯氨酸为载体的对映异构PVC膜选择性电极的研制

合成了手性物质N-十二酰基-l-脯氨酸(N-DDO-l-Pro)(脯氨酸, Pro), 作为PVC膜电极的载体, 在PVC膜表面与被测试液中Cu(II)与脯氨酸形成的配合物[Cu(II)(l-Pro)₂]或[Cu(II)(d-Pro)₂]进行配体交换, 形成[(l-Pro)Cu(II) (N-DDO-l-Pro)]或[(d-Pro)Cu(II)(N-DDO-l-Pro)]配合物. 由于生成的配合物热力学稳定性不同, 电极能优先响应l-Pro, 线性范围10^－4～10^―1 mol•L^－1, 斜率57 mV•dec^－1, 检测限3.89×10^－5 mol•L^－1. 电极能够对脯氨酸进行手性检测, 其对映选择性系数lg为－3.19.     

Cationic Surfactant Ion-Selective PVC Membrane Electrode Containing Macrocyclic Diimine Crown Ether

ABSTRACT

DP⁺ ion-selective PVC membrane electrode based on 2,3,11,12-dibenzo-5,9-diaza-4,9(10)-cis-diimino-1,13-dioxacyclopentadecane as a novel macrocyclic diimine crown ether is proposed. o-Nitrophenyl octyl ether as plasticizer and potassium tetrakis(4-chlorophenyl)borate as lipophilic salt were used. The electrode exhibits a Nernstian response for 1.0 x 10^?2-1.0 x 10^?6 mol 1^?1 DPCl with a slope of 58 mVdecade^?1. The detection limit is 2.5 x 10^?7 mol 1^?1. The electrode response was stable over a wide pH range (3-11). The lifetime of the electrode was about 2 months. The electrode shows a high selectivity towards inorganic cations. Among the organic cations tested, only hexadecyltrimethylammonium ion interferes. The electrode was suitable for determining the critical micelle concentration and as an end-point detector in the potentiometric titration of the cationic surfactants.