Add to ORKGp. 2482-2486.In this work a new experiment using HPLC is proposed in order to explore the role of acidity and the organic modifiers in the determination of methylxanthines in tea and coffee. Multivariate and univariate optimizations of the experimental conditions were used
Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistr...
To investigate the role of 7-methylxanthine as an intermediary compound in the degradation of theobr...
The increased popularity of alternative medicine treatments has prompted resurgence in the use of tr...
In this work a new experiment using HPLC is proposed in order to explore the role of acidity and the...
Texto completo: acesso restrito. p.1007–1013Caffeine (1,3,7-trimethylxanthine), theobromine (3,7-di...
Texto completo: acesso restrito. p. 45-48This work relates the development of an analytical methodol...
In this work, the coupling of a commercial monolithic column to a traditional low pressure FIA syste...
A sensitive and specific high-performance liquid chromatographic (HPLC) procedure is developed for s...
The contents of caffeine, theophylline and theobromine were studied in 100 plants commercialized in ...
Ilex paraguariensis A. St. -Hil. is a native species of southern South America. The caffeine content...
A simple and rapid HPLC method has been developed to analyse all the methylxanthines that can be pro...
<p>In general, there are four basic types of tea: green (not fermented), black (fermented), oolong a...
Liquid chromatography coupled with a photodiode array detector, electrospray ionization, collision- ...
Methylxanthines present psychostimulant effects. These compounds have low toxicity and their consump...
To carry out this study, 10 samples of different kinds and brands of teas were analyzed with the pur...
Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistr...
To investigate the role of 7-methylxanthine as an intermediary compound in the degradation of theobr...
The increased popularity of alternative medicine treatments has prompted resurgence in the use of tr...
In this work a new experiment using HPLC is proposed in order to explore the role of acidity and the...
Texto completo: acesso restrito. p.1007–1013Caffeine (1,3,7-trimethylxanthine), theobromine (3,7-di...
Texto completo: acesso restrito. p. 45-48This work relates the development of an analytical methodol...
In this work, the coupling of a commercial monolithic column to a traditional low pressure FIA syste...
A sensitive and specific high-performance liquid chromatographic (HPLC) procedure is developed for s...
The contents of caffeine, theophylline and theobromine were studied in 100 plants commercialized in ...
Ilex paraguariensis A. St. -Hil. is a native species of southern South America. The caffeine content...
A simple and rapid HPLC method has been developed to analyse all the methylxanthines that can be pro...
<p>In general, there are four basic types of tea: green (not fermented), black (fermented), oolong a...
Liquid chromatography coupled with a photodiode array detector, electrospray ionization, collision- ...
Methylxanthines present psychostimulant effects. These compounds have low toxicity and their consump...
To carry out this study, 10 samples of different kinds and brands of teas were analyzed with the pur...
Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistr...
To investigate the role of 7-methylxanthine as an intermediary compound in the degradation of theobr...
The increased popularity of alternative medicine treatments has prompted resurgence in the use of tr...