New method for determining the concentration of ionic impurities in solvent polymeric membranes

被引：47
作者：
Nagele, M [1 ]
Pretsch, E [1 ]
机构：
[1] ETH ZURICH,DEPT ORGAN CHEM,CH-8092 ZURICH,SWITZERLAND
来源：
MIKROCHIMICA ACTA | 1995年 / 121卷 / 1-4期
关键词：
ionic sites; PVC; Tecoflex(R); ion-selective electrodes;
D O I：
10.1007/BF01248256
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new method is proposed for ascertaining the amount of ionic impurities in solvent polymeric membranes of ion-selective electrodes. The method is based on determining the selectivity coefficient for ions of different valences as a function of the concentration of a lipophilized tetraphenylborate salt added to the membrane phase. Thus, the concentration of anionic impurities in commercially available poly(vinyl chloride) and of cationic ones in Tecoflex(R) (a polyurethane) was obtained as 0.063 +/- 0.016 and 0.044 +/- 0.006 mmol/kg, respectively.
引用
收藏
页码：269 / 279
页数：11
相关论文
共 39 条
  • [1] AMMANN D, 1983, ION SEL ELECTRODE R, V5, P3
  • [2] ANION-SELECTIVE MEMBRANE ELECTRODES BASED ON METALLOPORPHYRINS - THE INFLUENCE OF LIPOPHILIC ANIONIC AND CATIONIC SITES ON POTENTIOMETRIC SELECTIVITY
    BAKKER, E
    MALINOWSKA, E
    SCHILLER, RD
    MEYERHOFF, ME
    [J]. TALANTA, 1994, 41 (06) : 881 - 890
  • [3] SELECTIVITY OF POLYMER MEMBRANE-BASED ION-SELECTIVE ELECTRODES - SELF-CONSISTENT MODEL DESCRIBING THE POTENTIOMETRIC RESPONSE IN MIXED ION SOLUTIONS OF DIFFERENT CHARGE
    BAKKER, E
    MERUVA, RK
    PRETSCH, E
    MEYERHOFF, ME
    [J]. ANALYTICAL CHEMISTRY, 1994, 66 (19) : 3021 - 3030
  • [4] OPTIMUM COMPOSITION OF NEUTRAL CARRIER BASED PH ELECTRODES
    BAKKER, E
    XU, AP
    PRETSCH, E
    [J]. ANALYTICA CHIMICA ACTA, 1994, 295 (03) : 253 - 262
  • [5] DETERMINATION OF COMPLEX-FORMATION CONSTANTS OF NEUTRAL CATION-SELECTIVE IONOPHORES IN SOLVENT POLYMERIC MEMBRANES
    BAKKER, E
    WILLER, M
    LERCHI, M
    SEILER, K
    PRETSCH, E
    [J]. ANALYTICAL CHEMISTRY, 1994, 66 (04) : 516 - 521
  • [6] DONNAN EXCLUSION FAILURE IN LOW ANION SITE DENSITY MEMBRANES CONTAINING VALINOMYCIN
    BUCK, RP
    TOTH, K
    GRAF, E
    HORVAI, G
    PUNGOR, E
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1987, 223 (1-2): : 51 - 66
  • [7] BUHLMANN P, IN PRESS ELECTROANAL
  • [8] ELECTROCHEMICAL PERFORMANCE, BIOCOMPATIBILITY, AND ADHESION OF NEW POLYMER MATRICES FOR SOLID-STATE ION SENSORS
    CHA, GS
    LIU, D
    MEYERHOFF, ME
    CANTOR, HC
    MIDGLEY, AR
    GOLDBERG, HD
    BROWN, RB
    [J]. ANALYTICAL CHEMISTRY, 1991, 63 (17) : 1666 - 1672
  • [9] REFERENCE ELECTRODE WITH FREE-FLOWING FREE-DIFFUSION LIQUID JUNCTION
    DOHNER, RE
    WEGMANN, D
    MORF, WE
    SIMON, W
    [J]. ANALYTICAL CHEMISTRY, 1986, 58 (12) : 2585 - 2589
  • [10] DRAPER NR, 1981, APPLIED REGRESSION A
1234