Nanotech helps gauge hotness of chilli
The Scoville method, currently the industry standard, involves diluting a sample until five trained tasters cannot detect any heat from the chilli, reports Sciencedaily.
High performance liquid chromatography (HPLC) can also be used, but this requires bulky, expensive equipment and detailed analysis of capsaicinoids.
In Compton's method, the capsaicinoids are adsorbed onto multi-walled carbon nanotube (MWCNT) electrodes. The team measures the current change as the capsaicinoids are oxidised by an electrochemical reaction, and this reading can be translated into Scoville units.
The technique is called adsorptive stripping voltammetry (ASV), and is a relatively simple electrochemical method.
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