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Questions related from Joana P. A. Ferreira
I am starting with a GC-MS Agilent of 2013...a 7890. I was trying to make a manual injection (the method was developed for that purpose), but after my injection, I get an error from logbook...
12 December 2024 5,908 2 View
What do you think about the Journal Food Chemistry Advances? Does it worth publishing in there?
25 July 2023 8,167 5 View
I have some columns for my Thermo Scientific GC-MS: 1) DB-WAX 2) DB-1 c) DB-17HT d) VF-1MS e) TR-FAME f) TG-5MS g) TG-WAXMS A In my opinion, for polyphenols as flavonoid (and their glicosides)...
02 April 2022 7,988 3 View
I need to prepare a stock solution of 25U from an enzyme and the bottle I bought says that the enzyme is in 1U/mg. I am newin this field of research... I have worked only once with enzymes but I...
14 November 2021 5,515 3 View
Hello everybody! I am initiating my research on HPLC. I have used a C18 Accucore column, A gradient program of 40 min (60min in total) using as eluents MeOH (A) and Water(B), both acidified with...
22 May 2015 1,777 9 View
I have a complex mixture of phenolics, flavonoids and tannins from a methanol extract of Q suber. I did HPLC/UV in a C18 column using MeOH/Water/formic acid gradients and i don´t see any peak. It...
13 May 2015 5,297 7 View
