Background: Caffeine is the most consumed psychostimulant in the world that is found in
numerous foods and drinks with coffee and tea have the highest concentration of caffeine …

In this study three miniaturized liquid chromatography (LC) instruments have been
evaluated and compared for the analysis of caffeine in dietary supplements, namely a …

Caffeine is the most widely studied psychoactive molecule in history due to its many
pharmacological activities and a high number of biological and physiological effects. In …

Young leaves of seven guarana cultivars were collected (April/2019), in the Amazonian
municipalities of Maués, Presidente Figueiredo and Manaus, from ten plants/cultivar, in each …

A simple, precise and accurate HPTLC method was developed for the determination of
caffeine in different coffee products, beverage and pharmaceutical products. Caffeine from …

The present study was undertaken to develop a validated, rapid, simple and economic
HPLC method for estimating caffeine in pharmaceutical preparations. Chromatographic …

This study evaluated the technological feasibility of producing a semipurii ed extract of
guaraná (Paullinia cupana Kunth, Sapindaceae) in tablet form, using a direct-compression …

The present study focuses on the quantification of caffeine from 11 pharmaceutical and
natural products. Pharmaceutical products were purchased from pharmacy and include 4 …

Guaraná (P. cupana var. sorbilis) is a plant from the Amazonian region belonging to the
Sapindaceae family. Its red fruit is known for its high level of caffeine (approximately 4 g/100 …

Caffeine, trigonelline and nicotinic acid are important bioactive constituents of coffee. In this
work, the combination of different water temperatures and pressures in the settings of the …