title: Investigation of Polyhenolic Content of Rose Hip (Rosa caninaL.) Tea Extracts: A Comparative Study.
abstract: Three different brands of Rose hip (Rosa caninaL.) tea were extracted with water, ethanol (EtOH), methanol (MeOH), and aqueous mixtures (50%, v/v) by ultrasound-assisted extraction (UAE) and Soxhlet methods. Total phenolic content was determined according to the Folin-Ciocalteu method. The results were presented by means of the extract yields and total phenolic contents, expressed in gallic acid equivalent (GAE) per g of dried matter (DM). The greatest amount of extract observed in tea samples was obtained by UAE through water with the value of 619.37 ± 0.58 mg/g DM. Regarding the phenolic content, the best result was achieved by the Soxhlet method through 50% MeOH mixture (59.69 ± 0.89 mg GAE/g DM), followed by the UAE method with water (48.59 ± 0.29 mg GAE/g DM).
authors.affiliation: Department of Chemical Engineering, Engineering Faculty, Istanbul University, 34320 Avcılar, Istanbul, Turkey. zilbay@gmail.com.
authors.forename: Zeynep
authors.initials: Z
authors.lastname: İlbay
authors.affiliation: Department of Chemical Engineering, Engineering Faculty, Istanbul University, 34320 Avcılar, Istanbul, Turkey. selins@istanbul.edu.tr.
authors.forename: Selin
authors.initials: S
authors.lastname: Şahin
authors.affiliation: Department of Chemical Engineering, Engineering Faculty, Istanbul University, 34320 Avcılar, Istanbul, Turkey. krbaslar@istanbul.edu.tr.
authors.forename: Ş İsmail
authors.initials: Şİ
authors.lastname: Kirbaşlar
keywords: Rosa canina L.; extraction effect; soxhlet method; total phenol content; ultrasound-assisted extraction