钪-钙-茜素S异多核络合物的极谱吸附波

报道了钪－钙－茜素Ｓ（ＡＲＳ）异多核络合物极谱吸附波的形成及利用它测定钪的最佳实验条件。用此方法测定了矿石中的微量钪,并初步探讨了该极地的性质和电极反应机理。在单扫描极谱上用等魔鬼洋连续变化法和单纯形法测得络合物组成的摩尔比为ｎｓｃ＾３＋,ｎｃａ＾２＋;ｎＡＲＳ＝２：１：２。     

碱土金属的极谱研究 Ⅳ.钡-钙-茜素配合剂双金属三元配合物吸附波

本文研究了一个钡-钙-茜素配合剂(ALC)新体系的极谱波及其机理.此极谱波是一种双金属三元配合物吸附波,是由钡-钙-ALC配合物在电极上吸附还原而产生的.配合物的组成为:Ba∶Ca∶ALC=1∶2∶5.此方法可应用于硫酸钡溶度积的测定.     

碱土金属的极谱研究 I.钙一茜来红与配合吸附波及其应用

茜素红S在0.01M氢氧化钾介质中,于-0.67V处有一个导数波。加入钙离子后,在-0.77V出现一个尖锐的新的导数波。该波的峰高与钙离子浓度有良好的线性关系。在最佳条件下,钙的最低检测限为4x10[-3]M,浓度在7x10[-3]～7x10[-6]M内与峰高成正比。本文讨论了此极谱波的机理,确定了钙-茜素红S(ARS)配合物的组成为1:2。本法不需任何前处理,可直接应用于血清中微量钙的测定。     

钙—芦丁极谱络合吸附波的研究

在０．０１ｍｏｌ／ＬＫＯＨ底液中，用单扫示波极谱法可获得钙－芦丁络合吸附波，检出限为８．０＊１０＾－７ｍｏｌ／Ｌ．电极表面反应速率常数为ｋｓ＝ｄ１．２７ｓ＾－１。     

钪-茜素氨羧络合剂络合物极谱吸附波

在邻苯二甲酸氢钾和甲酸的混合缓冲底液 (pH 4.8)中 , 钪与茜素氨羧络合剂形成电活性络合物,在单扫描极谱上于-0.54 V(vs SCE)产生一灵敏的络合吸附波,其二阶导数峰高与钪的浓度在 4.0× 10-8～ 3.0× 10-6 mol/L范围内呈线性关系,检出限达 2.0× 10-8 mol/L。测定了络合物的组成,探讨了极谱波的性质和电极反应机理。方法用于矿物中微量钪的测定,结果令人满意。     

锆—钙—茜素S异多核络合物极谱吸附波的研究

报道了锆－钙－茜素Ｓ异多核络合物的形成及该异多核络合物极谱吸附波测定锆的最佳实验条件，用此法测定了矿石样品中的微量锆，并探讨了该极谱法的性质的电极反应机理，在单扫描示波极谱上用单纯形法和斜率比法测得该体系异多核络合物的组成比为：ｎｚｒ（Ⅳ）：ｎｃａ＾２＋；ｎＡＢＳ＝１：１：４．用分光光度法测定亦得到相同的结论。     

铟-茜素配位剂极谱配位吸附波的研究

本文报道了铟-茜素配位剂极谱配位吸附波产生的条件及其电极过程的机理研究.     

钙－芦丁极谱络合吸附波的研究

在０．０１ｍｏｌ／ＬＫＯＨ底液中（ｐＨ＝１１．７），用单扫示波极谱法可获得钙－芦丁络合吸附波，检出限为８．０×１０－７ｍｏｌ／Ｌ．测得电活性络合物组成为Ｃａ（Ⅱ）∶Ｒｔ＝１∶２，条件稳定常数为β＝４．８×１０１０．电极表面反应速率常数为ｋｓ＝１．２７ｓ－１．     

茜素配位剂极谱行为的研究

在pH5.9的0.1 M HOAc-NaOAc中,茜素配位剂的单扫极谱图上获得可逆的吸附前波,E_p_1=-0.43V(SCE).而可逆扩散波E_p_2=-0.48 V.电极反应为茜素配位剂由醌型还原为氢醌型.茜素配位剂在滴汞电极上的吸附符合Frumkin等温式.测得的吸附系数β=2.9×10~4,吸引因素v=1.27.     

稀土-镍-茜素配位剂极谱异核配合吸附波的研究

本文报道了稀土-镍-茜素配位剂体系异核配合物的极谱配合吸附波的形成条件及其机理的研究.此外还将其应用于发光材料中铕的测定。     

稀土元素的电分析化学研究 X:钆-茜素红的极谱配合吸附波的研究

In a supporting electrolyte containing 2X10-4M Alizarin Red S, 0.1M NH3-NH4Cl and at pH 9.6, we obtained an adsorptive complex wave of gadolinium-Alizarin Bed S by single-sweep polarography. The peak potential of the derivative wave is -0.69V (S. C. E.). The limit of detection for gadolinium is 6X10-8M. We have determined the composition of the complex which is 1:3 GD-Alizarin Red S and confirmed that the wave is an adsorptive complex wave. The electrode processes may be presented as follows: Gd3+ + 3HL2- + 3NH3 = (GdL3)6- + 3(NH4)^+ (Chemical reaction) (GdL3)6- = (GdL3)ad6- (Surface process) The total electrochemical reaction is (GdL3)ad6- + 6e + 6(NH4)^+ = (Gd(LH2)3)ad6- + 6NH3     

锗-茜素红S极谱配合吸附波的研究

在pH8.2～8.6的氨性缓冲溶液中,可获得锗-茜素红S的三个单扫极谱配合吸附波,在适宜条件下,三个波的峰高均与锗浓度有线性关系,其中第三个配合吸附波(Ep4=-1.130V)最灵敏,其最低检出限为1.0x10[-7]M锗,本文还进一步了三个配合吸附波的电极过程。     

线性变位极谱研究 V:碲的吸附电流方程式

The mechanism of the electroreduction of Te(IV) has been studied, it is (TeO3)2- + 3H2O + 4e = (Teads)0 + 6OH- (1) (Teads)0 + H2O + 2e = (Hte)- + OH- (Teads)0 + 2e = Te2- The reaction scheme can generally be expressed as follows: ACcordingly, the equation of adsorptive current is give: i = 0.629 n2**2F**i/RT \n\(D0)1/2m2/3t7/6 \Pn\/(1+\Pn\)**2 (C0)* where \Pn\ = bAtA,7exp n2F/RT (E-E0)/& When \Pn\ = 1 the current reaches the maximum, ip = 0.157 n2**2F**2/RT \n\(D0)1/2m2/3t7/6(C0)* This equation shows that the peak current ip is proportional to m2/3t7/6, the ratio of potential change v and the concentration of the substance O being reduced. The half wave width, w1/2, can be obtained from the equation (6) in the form of the following expression W1/2 = 3.52RT/n2F The theoretical conclusions are in good agreement with experimental data for the adsorptive wave of tellurium in 0.25M NH3-NH4cl solution. The diffusion coefficient value determined agrees with that obtained by other polarographic method reported in the literature.     

烯土硝酸盐冠醚配合物Y(NO3)3 3H2O-B15C5-CH3CN三元体系18`C时溶解度的研究

A semimicro method has been used to study the solubilities of the ternary system, Y(NO3)3.3H2O-B15C5-CH3CN, at 18C. The results indicated that there is only one complex formed in this system. The stable complex has been isolated and its composition was determined by chemical analysis to be Y(NO3)3.B15C5.3H2O and the dehydration behavior of the complex was studied using DTA and TG methods.     

稀土元素的电分析化学研究 IX:铽-8-羟基喹啉——-高氯酸钠的极谱配合附波

In this paper the polarographic behavior of terbium-oxine(Ox)- sodium perchlorate system has been studied. In the solution of NaClO4, Ox has a well defined single-sweep polarographic wave P1. After the addition of Tb3+ a new wave P2 appears at more negative potential. A linear calibration curve of the decrease of P1 is obtained in Tb3+ concentration range from 1.0X10-6M to 1.0X10-5M under the optimun conditions of pH4.0-4.5, 0.1M NaClO4-8X10-5M Ox. The wave height of P2 increases linearly with Tb3+ concentration from 3.0X10-6M to 3.0X10-5M in 0.1M NaClO4-2.0X10-4M Ox. It has been shown by applying a number of polarographic techniques that the wave is an adsorptive complex wave. We proposed the reduction processes of the complex and determined the dissocation constants of Ox.