Analyical Application of Ion Transfer Across the Memembrane Stabilized Interface Between Two Immiscible Electrolyte Solutions in a Flow Injection System
No Thumbnail Available
Date
1990-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa Universty
Abstract
Using the voltammetric senor which is constracted in
our laboratory and the membrane stabilized interface between
two immiscible electrolyte solution in a flow injection
system the transfer of anions (CIO ,NO & 01 land catiol's
4 '3
+ +
(i( Na lfrom the aqueous to the organic phase have been
investiJ'(ated.ln order to determine the Horking potential
region of the system the behaviour of the potential-current
dependence of the support inA electrolytes Here studied. The
iR drop resulting fron the dilution effect of tl,e distilled
Ivate'!, at the interface has been investigated and it Has
compensated by increasing 1;he concentration of the
supporting electrolyte in t,he aqueous phase . Dependence of
the peak current on the applied
concentration of various ions (ClO ,
4
been investigat,ed. The det,ermination
potentials
_. + +
NO , K & Na
3
of K+ and Na+
in the presence of dibenzo-18-croHn-6 in the
and on
have
Has made
organic
+
phase. The method "as applyed to t),e determination of Na and
+ K in blood serum samples Hnd the values obtained \Vere in
good agreement Iii th the values obtained by flame photometric
method. The selectivity of the method Has also studied and
lias found to be potential dependent and governed bv the
partial sensitivity of the individual ion. A method has also
been proposed for the deternd ngtion of a particu} ar ion in
the presence of another ion. The detection limit of the
detector has heen determined to be about 0.25 µM for
perchlorate ion. Thus the method is rapid, precise,
sensitive for the determination of some anions and cations.
Description
Keywords
Two Immiscible Electrolyte Solutions