TY - JOUR
T1 - Comparative study of potentiometric and amperometric tissue-based electrodes for oxalate
AU - Fonong, Tekum
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1986
Y1 - 1986
N2 - Acetone-precipitated pulp from banana skins is physicall entrapped at the tip of a carbon dioxide gas-sensor and on a hydrogen peroxide sensor probe to determine oxalate potentiometrically and amperometrically in aqueous solution and inurine. The enzyme present in the tissue is oxalate oxidase. The potentiometric response has a slope of 47-50 mV/decade for 1 × 10-4 M-2 × 10-3 M oxalate with a detection limit of 2 × 10-5 M. The amperometric response is linear for 2 × 10t-5-3 × 10-4 M oxalate with a dectection limit of 2 × 10-6 M. Average recoveries of oxalate added to aqueous samples were 96.2% and 98.0%, and average relative standrd deviations were 3.8% and 3.6% for the potentiometric and amperometric systems, respectively. Oxalate was determined in six control urine samples, with relative errors of about 2.5%, by both electrode systems after a simple clean-up.
AB - Acetone-precipitated pulp from banana skins is physicall entrapped at the tip of a carbon dioxide gas-sensor and on a hydrogen peroxide sensor probe to determine oxalate potentiometrically and amperometrically in aqueous solution and inurine. The enzyme present in the tissue is oxalate oxidase. The potentiometric response has a slope of 47-50 mV/decade for 1 × 10-4 M-2 × 10-3 M oxalate with a detection limit of 2 × 10-5 M. The amperometric response is linear for 2 × 10t-5-3 × 10-4 M oxalate with a dectection limit of 2 × 10-6 M. Average recoveries of oxalate added to aqueous samples were 96.2% and 98.0%, and average relative standrd deviations were 3.8% and 3.6% for the potentiometric and amperometric systems, respectively. Oxalate was determined in six control urine samples, with relative errors of about 2.5%, by both electrode systems after a simple clean-up.
UR - http://www.scopus.com/inward/record.url?scp=0010423282&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0010423282&partnerID=8YFLogxK
U2 - 10.1016/S0003-2670(00)81801-2
DO - 10.1016/S0003-2670(00)81801-2
M3 - Article
AN - SCOPUS:0010423282
SN - 0003-2670
VL - 186
SP - 301
EP - 305
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - C
ER -