TITLE:
Novel Screen-Printed All-Solid-State Copper(II)-Selective Electrode for Mobile Environmental Analysis
AUTHORS:
Johannes Schwarz, Kathrin Trommer, Michael Mertig
KEYWORDS:
All-Solid-State Copper(II)-Selective Electrode, Conducting Polymers, Potentiometric Titration, Environmental Samples
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.7 No.7,
June
30,
2016
ABSTRACT: Based
on poly(vinyl chloride) membranes, a novel miniaturized screen-printed
all-solid-state copper(II)-selective electrode has been developed
for applications in environmental monitoring. Performance and applicability
of the ion-selective electrode (ISE) have been proved by potentiometric investigations.
Conducting polymers were used as intermediate layers and as solid contacts
between the ion-selective membrane and the graphite transducer. The
ion-complexing reagent 2-mercapto-benzoxazole was incorporated into poly(vinyl
chloride) membranes. In the concentration range 10-6 - 10-2 mol/L, the ISE exhibited a linear Nernstian potential response to copper(II)
with an average slope value of 28 mV/decade. The detection limit was 3 × 10-7 mol/L. The electrode exhibits a short response time ( electrode
has also successfully been used in potentiometric, complexometric titrations
with ethylenediaminetetraacetic acid.