| Autor: |
Abayomi, Louise, Terry, Leon |
| Zdroj: |
Sensing & Instrumentation for Food Quality & Safety; Dec2007, Vol. 1 Issue 4, p183-187, 5p |
| Abstrakt: |
A disposable prototype electrochemical biosensor was constructed using pyruvate dehydrogenase immobilised on mediated Meldolas Blue electrodes to determine pungency in onions ( Allium cepa L.). The optimum operating potential was +50 mV vs. Ag/AgCl reference/counter electrode. The biosensor was able to differentiate between mild and pungent bulbs with pyruvate concentrations ranging between ≈4 and 8 mM in freshly extracted juices. Resolution was 0.5 mM and thus was comparable to the standard Schwimmer and Weston-based colorimetric assay currently employed by industry for determining pungency in macerated onion tissue. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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