Caracterização da composição química de grãos de cafés arábica (Coffea arabica L.) e Conilon (Coffea canephora P.)
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Data
2001
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Resumo
Há necessidade de estudos detalhados em relação aos constituintes químicos dos cafés de espécies e safras diferentes. Por isso, o presente trabalho teve por objetivo avaliar a composição química dos grãos de cafés arábica e conilon. Foram utilizados grãos de café arábica - safra 88/89, café arábica - safra 2000 e grãos de café conilon - safra 2000, doados por uma indústria torrefadora do sul de Minas Gerais. Os cafés arábicas foram provenientes de Minas Gerais e o conilon do Espírito Santo. O
delineamento utilizado foi o inteiramente casualizado - DIC, com quatro repetições; as diferenças entre as médias foram verificadas pelo teste de Tukey em nível de 5% de probabilidade. Foram realizadas as seguintes análises: proteína bruta, resíduo mineral fixo, fibra bruta, extrato etéreo, acidez total titulável e pH . Os resultados experimentais permitiram verificar que o café arábica - safra 2000 apresentou maior teor de proteína bruta e de fibra bruta. Não houve diferença significativa para os teores do resíduo mineral fixo e acidez titulável total nos cafés estudados. Houve diferença significativa para os teores de extrato etéreo em todos os cafés, e o café arábica-safra 88/89 apresentou o menor teor. Acredita-se que tenha ocorrido degradação devido ao tempo de armazenamento deste café. Os cafés da safra 2000 (arábica e conilon) apresentaram maiores valores de pH e diferiram do café arábica - safra 88/89, que apresentou valor inferior.
There is a need for detailed studies in relation to the chemical components of the coffee beans from different species and crops. For this reason the present work had for objective to evaluate the chemical composition of Arabic and conilon coffee grains. So, Arabic coffee beans from the 88/89 crop and Arabic and conilon coffee beans from the 2000 crop were used through donation made by a coffee roasting industry in South of Minas Gerais. The Arabic coffee came from Minas Gerais and the conilon from Espírito Santo. The experimental design was an entirely randomized - DIC, with 4 repetitions, the differences among the averages being verified through Tukey’s test at a 5% level of probability. Analyses were made of rude protein, fixed mineral residue, rude fiber, ethereal extract, total acidity and pH and the results showed that the 2000 Arabic coffee presented a higher level of rude protein and rude fiber. For all samples there wasn’t a significant difference for the levels of fixed mineral residue and total acidity but a significant difference was found for the levels of ethereal extract, having the 88/89 Arabic coffee presented the lowest content. It is believed that some degradation has occurred due to the long period of storage of this coffee. The Arabic and conilon coffee of the 2000 crop presented both high pH values, differing from the 88/89 Arabic coffee which showed a lower value.
There is a need for detailed studies in relation to the chemical components of the coffee beans from different species and crops. For this reason the present work had for objective to evaluate the chemical composition of Arabic and conilon coffee grains. So, Arabic coffee beans from the 88/89 crop and Arabic and conilon coffee beans from the 2000 crop were used through donation made by a coffee roasting industry in South of Minas Gerais. The Arabic coffee came from Minas Gerais and the conilon from Espírito Santo. The experimental design was an entirely randomized - DIC, with 4 repetitions, the differences among the averages being verified through Tukey’s test at a 5% level of probability. Analyses were made of rude protein, fixed mineral residue, rude fiber, ethereal extract, total acidity and pH and the results showed that the 2000 Arabic coffee presented a higher level of rude protein and rude fiber. For all samples there wasn’t a significant difference for the levels of fixed mineral residue and total acidity but a significant difference was found for the levels of ethereal extract, having the 88/89 Arabic coffee presented the lowest content. It is believed that some degradation has occurred due to the long period of storage of this coffee. The Arabic and conilon coffee of the 2000 crop presented both high pH values, differing from the 88/89 Arabic coffee which showed a lower value.
Descrição
Trabalho apresentado no Simpósio de Pesquisa dos Cafés do Brasil (2. : 2001 : Vitória, ES). Resumos. Brasília, D.F. : Embrapa Café, 2001. 181p. : il.
Palavras-chave
Café arábica Conilon Grãos Composição química, Coffee Arabic Conilon Chemical composition.
Citação
Fernandes, Simone Miranda; Pereira, Rosemary Gualberto Alvarenga Fonseca; Nery, Fernanda Carlota; Pinto, Nísia Andrade Villela Dessimoni. Caracterização da composição química de grãos de cafés arábica (Coffea arabica L.) e Conilon (Coffea canephora P.). In: Simpósio Brasileiro de Pesquisa dos Cafés do Brasil (2. : 2001 : Vitória, ES). Anais. Brasília, D.F. : Embrapa Café, 2001. (CD-ROM), p. 1460-1465