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- W2216470265 abstract "An indicative investigation of some commercial tea and coffees commonly found in the Dodoma, Tanzania markets, showed relative recommended percentage of caffeine, though slight variations were observed. Determinations of the amount of caffeine in tea and coffee (~ 5 g each) extracts were done by liquid -liquid extraction method and purified caffeine was characterized by determining the melting points. The amount of caffeine in percentage and average melting point ranges of coffees were as follow; Tanica 245.5 - 248.3 o C (2.225%); Africafe 247.2 - 248.1 o C (1.965%), Arabica (raw coffee) 236.5 - 242.2 o C (0.565%) and Robusta (raw coffee) 32.5 (0.65 %). Whereas for teas; Chai Bora (Supreme blend) 236-239 o C (1.75%), Kilimanjaro tea 234-237 o C (0.93%) , Green label 1.03% , Amani Golden tea 234- 237 o C (1.09%) , Chai bora (Luxury blend) 0.9% , African Pride tea 236-240 o C (1.24%), and Locally prepared tea 231-237 o C (0.7%). Both teas and coffees were moderately acidic with pH values range from 5.0 to 6.10. These results show an indicative difference of amounts of caffeine for different coffee and tea brands. However coffee was observed to have relatively high caffeine content compared to tea. Keywords: Caffeine, coffee, tea, metabolism, Dodoma, Tanzania" @default.
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- W2216470265 date "2012-07-25" @default.
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- W2216470265 title "Indicative Investigation of Amount Caffeine in Some Commercial Teas and Coffees Found in the Dodoma Markets" @default.
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