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Extraction of samplesThe samples of flour and biscuits were extractedwith 5 different solutions extractors: methanol (I),methanol 50% (II), methanol acidified (III), methanol50%: acetone 70% (IV) and acetone 70% (V). Itwere weighed 0.5 g of sample and diluted in 10ml ofextracting solution for 1 hour under stirring protectedfrom light. The extracts were filtered and completedin 100 ml with distilled water.
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