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|Type:||Artigo de periódico|
|Title:||Contribution of guarana powder (Paullinia cupana) as a source of caffeine in the diet|
|Abstract:||Objective The present study was conducted in order to determine the caffeine levels in different brands of commercially available guarana powder. Methods The analytical methodology involved extraction with water clean-up with saturated basic lead acetate solution and determination by high performance liquid chromatography with diode array detector (200-400nm). 39 samples were purchased in the cities of Campinas and Ribeir (a) over tildeo Preto, SP between December 2003 and January 2004 and analyzed. Results The caffeine levels in the samples varied widely ranging from 9.52 to 36.71mg/g, probably due to differences in the origin of the raw material and to the types of processing that the guarana seeds are submitted to. In comparison to coffee, traditional source of caffeine in the diet, it is possible to verify that the average caffeine content in guarana powder is about four times higher than the quantities present in coffee. Conclusion Among guarana powder consumers, this product may be considered as an important source of caffeine in the diet. The association with other products containing caffeine suggests that the guarana powder consumption should be controlled as the debate regarding caffeine's safe dose of intake remains.|
high performance liquid chromatography
|Editor:||Pontificia Universidade Catolica Campinas|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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