The aim of the present study was to develop a capillary gas chromatography method for the
quantitative analysis of caffeine in Brazilian guarana as seed powder, dried crude ethanol …

A reversed-phase high-performance liquid-chromatographic method for the determination of
caffeine and theophylline in commercial guarana samples (drug obtained from the seeds of …

Paullinia cupana is a plant native to Brazil that is widely used in traditional medicine as a
physical and mental stimulant. It is also used worldwide to produce soft drinks. A method for …

Herbal preparations derived from the dried seeds of guarana (Paullinia cupana) have
become a popular nutritional supplement used for stimulatory purposes. Once considered a …

The present work was designed to quantify the caffeine and total polyphenols in the
extractive solution and the granulated form from the seeds of Paullinia cupana var. sorbilis …

The Neotropical plant 'guaraná'has been widely used in medicine, cosmetics, and industry
because of its versatile biological activities. These effects are mainly attributed to the …

Abstract The Identity Of Caffeine As The Major Xanthine Present In Guarana Has Been
Confirmed By Spectroscopic Methods. Theobromine and Theophylline Were Present In …

A capillary gas chromatography procedure for the determination of coumarin and kaurenoic
acid in" guaco'(Mikania glomerata Spreng., Compositae) leaves is described. The method is …

Paullinia cupana, commonly known as guarana, is an Amazonian fruit whose seeds are
used to produce the powdered guarana, which is rich in caffeine and consumed for its …

The last years have seen a significant increase in the use of herbal medicines and their
preparations all over the world. Adulterations with synthetic drugs are common problems …