Hydroquinone 4% –the medical cream as alternative to phenol for identification of wheat varieties
Seeds of six common wheat (Triticum aestivum L.) and two durum (Triticum durum Desf.) varieties were exposed to a phenol (1%) and hydroquinone (4%) medical cream in a colour reaction test, for varietal identification. The test was based on the evaluation of the intensity of the seed pericarp coloration. All common wheat varieties, with the exception of Mexipak, coloured black in reaction to phenol (1%) or hydroquinone (4%), while the Mexipk variety changed colour, but was faded. Durum varieties on the other hand, did not show any colour changes in reaction to either reagent. It is concluded that the hydroquinone (4%) medical cream has the potential to be a useful alternative for varietal identification or purity analysis of wheat.
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Document Type: Research Article
Publication date: July 1, 2008
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