216 343 343 6 6 M. C. Gennaro C. Abrigo Dipartimento di Chimica Analitica Universitá di Torino Via P. Giuria 5 I-10125 Torino Italy Summary A new method based on reversed-phase ion-interaction HPLC is described for the identification and quantitation of theobromine, theophylline and caffeine in beverages. The interaction reagent used is octylamine orto-phosphate which also constitutes the mobile phase. The stationary phase is a microparticulate reversed-phase C-18 packing. With spectrophotometric detection at 274 nm, detection levels of 0.15, 0.30 and 0.40 ppm were achieved for theobromine, theophylline and caffeine, respectively. Quantitative analysis was performed by the standard addition method for theobromine and caffeine contents in tea, espresso-coffee, decaffeinated coffee, decaffeinated tea and cola-beverages.
Analytical and Bioanalytical Chemistry – Springer Journals
Published: Jun 1, 1992
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera