Hydrochloric Acid → Flavonol

Beteiligte Stoffe

Reaktionsschritte

Determination of flavonoid glycosides and narichalcone (2′,4′,6′,4-tetrahydroxychalcone) in tomato fruit is carried out using a non-hydrolysing method as follows: 40 mg of freeze-dried tomato tissue is weighed and transferred to a 10 ml Pyrex glass tube. To each tube 4 ml of 75% aqueous methanol acidified with HCl to pH 2 is added. The tubes are closed with screw tops containing a Teflon inlay and incubated at room temperature (20-25° C.) for 1 hr with continuous mixing on a roller band.

Herkunft & Nachweise