Authors: Mobeen Arif, Steven Setford, Kerry Burton and Ibtisam Tothill Reviewer:
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Transcript of Authors: Mobeen Arif, Steven Setford, Kerry Burton and Ibtisam Tothill Reviewer:
L-Malic acid biosensor for field-based evaluation of apple, potato and tomato horticultural produce
Authors:
Mobeen Arif, Steven Setford, Kerry Burton and Ibtisam Tothill
Reviewer:
Bax Smith, B.Sc. (Chemistry), B.Eng. (Electrical Engineering), M.Eng. Candidate (Robotics)
Today’s Talk
Purpose of the Paper– Why L-Malic acid Biosensor?
Characteristics of the Sensor– Electrode Composition– Performance– Inhibitors
Results from Real Testing
Purpose of the Paper
Want a quick, simple and cheap way to detect if apples are ripe
Current Methods:– LC, GC– Capillary Isotachophoresis– FTIR Spectrometry– Enzymatic assay with Photometric Detection
L-Malic Acid amounts decrease as fruit ripens
The Sensor
Electrodes: Bare Carbon vs Rhodinised Carbon
Sensor Performance
Inhibition Effects
Testing Real Samples
Conclusion
Linear Range less than Test Kit:– 0.028-0.7mM vs 0.0038-2.5mM
Faster than Test Kit:– 6min vs 24min