Naslov
ICP-AES determination of minor- and major elements in various berries after microwave assisted digestion

Autori
Zeiner, Michaela ; Juranović Cindrić, Iva ; Krpetić, Martina ; Stingeder Gerhard

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts / Buchberger, Wolfgang - Linz : University of Linz, Austria, 2011

Skup
14. Österreichische Chemietage

Mjesto i datum
Linz, Austrija, 26.09.2011. - 29.09.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
berries; elements; ICP-AES

Sažetak
Inductively coupled plasma atomic emission spectrometry (ICP-AES) was used for the determination of minor and major elements present in cornelian cherries, blueberries, rose hip, and cranberries, as these fruits themselves and/or food stuff prepared from them are of nutritional importance. These berries are rich in sugar, anthocyanins, organic acids, tannins, phenols and antioxidants. All samples were collected in Croatia. Prior to ICP-AES measurement, the dried samples were digested in a closed microwave assisted digestion system. The ICP-AES method was validated and optimized for the determination of selected elements in the different kind of berries. The study was focused on the following elements: Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Ni, Pb, Sr, and Zn. The accuracy of the method was determined by spiking experiments, the recoveries obtained after microwave digestions in whole fruit ranged from 84-123%, 83-101%, 83- 115% and from 79-108% for cornelian cherries, blueberries, rose hip, and cranberries, respectively. The precision, the intermediate precision, the day-to-day reproducibility (< 6.8%), and the overall uncertainty of measurement (approx. 4-10%) for all elements analyzed were up to 2.2%, 5.1%, 7.3%, and from 4-10%, respectively. The limits of detection obtained were all below 4 μg g-1. All berries are rich in K (0.1 up to 4 mg/g) and Mg (0.02 up to 1.2 mg/g). No cadmium, cobalt, and chromium could be detected in all samples. Cupper was found only in cornelian cherries. The contents of iron, manganese, sodium, nickel, lead, and zinc ranged from 2-20 μg/g, 1-250 μg/g, 2-25 μg/g, 13-45 μg/g, 0.3-6 μg/g, and 1-12 μg/g, respectively.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA