Maša Hojnik (Avtor), Mojca Škerget (Avtor), Željko Knez (Avtor)

Povzetek

This study was aimed to assess the feasibility of extracting chlorophylls fromstinging nettle (Urtica dioica L.) by solvent extraction. In preliminary, the investigation concerned three parts of raw material (leaves, stalk and whole plant), different preservation techniques (blanching and drying) and different storage temperatures of preserved material ( |20 C for blanched and 4 C for dried sample). Extracts were analysed for chlorophyll A and chlorophyll B, respectively, by means of HPLC method. Afterwards, optimizationof single-step conventional extraction was carried out by examining the influence of the following process parameters on the extraction yield and isolation efficiency of chlorophylls: type of organic solvent, content of water in ethanol/water mixtures, ratio solvent/material, temperature, time of extraction and pH of the extraction mixture. Furthermore,to improve the yield and/or the selectivity of the extraction, multi-step conventional extraction experiments as well as other solid ]liquid extraction techniques (soxhlet and ultra-sound assisted) were performed and compared. c 2007 Elsevier B.V. All rights reserved.

Ključne besede

kemijska procesna tehnika;ekstrakcija;koprive;izolacija klorofila;vsebnost klorofila;topila;chemical processing;extraction;nettle;isolation of chlorophyll;chlorophyll content;solvent extraction;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 66.061
COBISS: 11289878 Povezava se bo odprla v novem oknu
ISSN: 1383-5866
Št. ogledov: 2165
Št. prenosov: 99
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarne ključne besede: kemijska procesna tehnika;ekstrakcija;koprive;izolacija klorofila;vsebnost klorofila;topila;
URN: URN:SI:UM:
Strani: str. 37-46
Letnik: ǂVol. ǂ57
Zvezek: ǂiss. ǂ1
Čas izdaje: 2007
ID: 8717346