Preliminary Investigation of Potentiometric Stripping Analysis at the Gel Stablized Water/Oil Interface
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Date
1993-01
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Addis Ababa,University
Abstract
Po t en t i ometric s t ripping ana l ys i s (PSA) was applied
t o the interface between two immiscible electrolyte solutions
(IT I ES). The analysis was done on anions of t hi ocya
nate, perchlorate and nitra te .
Po l yviny l chlo r ide- nitrobenzene (PVC - nb ) gel ' .... as
prepared fo l l owing the pr ocedure in troduced by Senda e t a l
I Bunseki Kagaku , 33 (1 98 4 ) E 371] and t he PVC- nb gel e le c trode
wa s cons t r ucted us ing polytetrafluor oet hylene (PTFE)
t ub ing as a main ce l l body .
The behavi our of t he cell was charac terized by ac and
dc cyclic voltammetry and r e pr oducible vo l tammog r ams we re
obt a ined showing t ha t the i on transpor t pr ocess es in both
phases i s dif f usion controlled . The r e ve r s i bi li t y of the
sys tem ยท.. .. a s also t es ted us ing cu rrent r eve rs a l techniques .
The dependence of transition time (l l on depos ition
t i me and depos i t i on (or e nr ichment) pot enti a ls was quall~
tat i vely studied . From t his pr eliminary study the method
(PSAl was found t o be quite applicable for t he electro lysis
of ions aCFOSS the ITIES.
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Keywords
Preli Minary Invest Igation of Potenti Ometric Stripping