Comparative study of potentiometric and amperometric tissue-based electrodes for oxalate

Tekum Fonong

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)301-305
Number of pages5
JournalAnalytica Chimica Acta
Volume186
Issue numberC
DOIs
StatePublished - 1986
Externally publishedYes

Fingerprint

Oxalates
oxalate
comparative study
Electrodes
electrode
Tissue
oxalate oxidase
Musa
sensor
Acetone
Chemical sensors
Carbon Dioxide
Hydrogen Peroxide
Pulp
Limit of Detection
acetone
Skin
urine
hydrogen peroxide
Gases

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

Cite this

Comparative study of potentiometric and amperometric tissue-based electrodes for oxalate. / Fonong, Tekum.

In: Analytica Chimica Acta, Vol. 186, No. C, 1986, p. 301-305.

Research output: Contribution to journalArticle

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