Determinação de cafeína em bebidas, alimentos e medicamentos utilizando o smartphone e software para computador
DOI:
https://doi.org/10.53660/CONJ-1785-2L14Palavras-chave:
Cafeína; ImageJ; Smartphone; Cromatografia; EspectrofotômetroResumo
A cafeína é um alcaloide de ocorrência natural nas folhas e sementes de muitas plantas geralmente adicionadas a medicamentos, alimentos e produtos de bebidas, sendo uma das substâncias psicoativas mais consumidas no mundo. O consumo mundial per capita tem aumentado através do consumo de bebidas energéticas, medicamentos, chá verde, erva-mate e principalmente, do café. Brasil é líder mundial na produção e exportação de grãos de café. Desta forma, o presente estudo visa analisar e quantificar a presença de cafeína em amostras de café nos diferentes estágios de maturação, chá verde, erva-mate e medicamentos através da técnica de cromatografia em camada delgada (CCD). O smartphone foi utilizado para captura das manchas nas placas de CCD e o tratamento de imagens digitais foi feito a partir do uso de software computacional ImageJ. Os resultados das análises e quantificação foram comparados com os resultados no espectrofotômetro de UV-visível. Os resultados observados nos processos avaliativos foram satisfatórios o que valida a técnica simples e rápida para determinação de cafeína em amostras naturais e em formulações
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