A PHOSPHATE SENSOR BASED ON SILVER PHOSPHATE-MODIFIED ELECTRODES

被引：12

作者：

VERMES, I ^{[1
]}

GRABNER, EW ^{[1
]}

机构：

[1] UNIV FRANKFURT,INST PHYS & THEORET CHEM,NIEDERURSELER HANG,W-6000 FRANKFURT 50,GERMANY

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1990年 / 284卷 / 02期

关键词：

D O I：

10.1016/0022-0728(90)85041-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A phosphate sensitive ion-selective electrode based on silver phosphate has been prepared by electrochemical deposition of silver on platinum and subsequent anodic dissolution of the deposited Ag in alkali phosphate solutions. The potential of these Ag3PO4modified electrodes is controlled by PO3-4 ions in the activity range of 3 × 10-9 < aPO < 3 × 10-5 at pH 7-10 and with a Nernstian slope of about -20 mV/paPO. Strong interference is observed with Cl- ions. The electrode is suitable for the potentiometric titration of phosphate ions and for the determination of phosphate by the standard addition method according to Gran. © 1990.

引用

页码：315 / 321

页数：7

共 16 条

[1]

BARNARTT S, 1985, J ELECTROCHEM SOC, V132, P12

[2]

BEG MN, 1988, INDIAN J CHEM A, V27, P460

[3] The extent of dissociation of salts in water. Part VIII. An equation for the mean ionic activity coefficient of an electroltye in water, and a revision of the dissociation constants of some sulphates [J].

Davies, CW .

JOURNAL OF THE CHEMICAL SOCIETY, 1938, :2093-2098

[4]

GLAZIER SA, 1988, ANAL CHEM, V60, P2542

[5] A PHOSPHATE-SENSITIVE ELECTRODE BASED ON BIPO4-MODIFIED GLASSY-CARBON [J].

GRABNER, EW ;

VERMES, I ;

KONIG, KH .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 214 (1-2) :135-140

[6] DETERMINATION OF THE EQUIVALENCE POINT IN POTENTIOMETRIC TITRATIONS .2. [J].

GRAN, G .

ANALYST, 1952, 77 (920) :661-671

[7] ACTIVATION AND DEACTIVATION OF GLASSY-CARBON ELECTRODES [J].

HU, IF ;

KARWEIK, DH ;

KUWANA, T .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1985, 188 (1-2) :59-72

[8] Individual activity coefficients of ions in aqueous solutions [J].

Kielland, J .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1937, 59 :1675-1678

[9]

MIDGLEY D, 1986, ION SEL ELECTRODE R, V8, P3

[10]

MORF WE, 1982, PRINCIPLES ION SELEC, P17

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