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master's thesis
Elementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu
Zagreb: University of Zagreb, Faculty of Science, 2017. urn:nbn:hr:217:497019
Hlebec, Dora
University of Zagreb
Faculty of Science
Department of Biology
University of Zagreb
Faculty of Science
Department of Chemistry

Institutional repository: Repository of the Faculty of Science

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Hlebec, D. (2017). Elementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu (Master's thesis). Zagreb: University of Zagreb, Faculty of Science; Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:497019

Hlebec, Dora. "Elementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu." Master's thesis, University of Zagreb, Faculty of Science; University of Zagreb, Faculty of Science, 2017. https://urn.nsk.hr/urn:nbn:hr:217:497019

Hlebec, Dora. "Elementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu." Master's thesis, University of Zagreb, Faculty of Science; University of Zagreb, Faculty of Science, 2017. https://urn.nsk.hr/urn:nbn:hr:217:497019

Hlebec, D. (2017). 'Elementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu', Master's thesis, University of Zagreb, Faculty of Science; University of Zagreb, Faculty of Science, accessed 20 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:497019

Hlebec D. Elementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; Zagreb: University of Zagreb, Faculty of Science; 2017 [cited 2024 November 20] Available at: https://urn.nsk.hr/urn:nbn:hr:217:497019

D. Hlebec, "Elementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu", Master's thesis, University of Zagreb, Faculty of Science, Zagreb; University of Zagreb, Faculty of Science, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:217:497019

Metadata
TitleElementna analiza orašastih plodova atomskom spektrometrijom uz induktivno spregnutu plazmu
Title (english)Determination of micro- and macroelements in nuts by inductively coupled plasma atomic spectroscopy
AuthorDora Hlebec
MentorIva Juranović Cindrić (mentor)
MentorNenad Judaš (mentor)
Committee memberIva Juranović Cindrić (predsjednik povjerenstva)
Committee memberNenad Judaš (član povjerenstva)
Committee memberInes Radanović (član povjerenstva)
Committee memberJasna Lajtner (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Biology)
Zagreb
GranterUniversity of Zagreb
Faculty of Science
(Department of Chemistry)
Zagreb
Defense date and country2017-07-14, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Sadržaj esencijalnih i toksičnih elemenata u orašastim plodovima (orahu, bademu, lješnjaku, brazilskom i indijskom oraščiću) određen je metodom atomske emisijske spektrometrije uz induktivno spregnutu plazmu. Uzorci su razoreni u uređaju za mikrovalno potpomognuto razaranje, a nakon optimizacije i validacije metode u uzorcima je određen udio Al, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Ni, Pb, Sr, V i Zn. Udio K i Na određen je plamenom fotometrijom. Točnost metode određena je na temelju iskoristivosti metode koja iznosi: 95 – 131 % za orah, 94 – 104 % za badem, 69 – 120 % za lješnjak, 80 – 129 % za brazilski oraščić i 89 – 110 % za indijski oraščić. Od makroelemenata u orašastim su plodovima najveći udjeli dobiveni za K i Ca, a od mikroelemenata za Fe, Mg, Mn i Zn. Toksični elementi (Co, Ni, V i Pb) prisutni su ispod detekcijskih granica (< 0,025 μg L−1). Rezultati elementne analize su uspoređeni s preporučenim dnevnim unosom elemenata u 100 i 20 g orašastih plodova. U okviru metodičkog dijela rada prikazan je prijedlog nastavnog sata o plazmi kao fizikalnom fenomenu koji će omogućiti uključivanje ovakvih sadržaja u svakodnevnu nastavnu praksu.
Abstract (english)
The content of essential and toxic elements in nuts (walnut, almond, hazelnut, brazil nut, cashew) was determined by inductively coupled plasma atomic emission spectrometry after thorough optimization and validation of the analytical procedure. The samples were digested in a microwave assisted digestion system, and the elements Al, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Ni, Pb, Sr, V i Zn were quantified. The concentration of K and Na however, were determined with flame photometry. The accuracy of the ICP-AES method expressed by the recovery determined by spiking experiments for micro- and macroelements ranged from 95 – 131 % for walnut, from 94 – 104 % for almond, from 69 – 120 % for hazelnut, from 80 – 129 % for brazil nut and from 89 – 110 % for cashew. The highest concentration among macroelements have been found for K and Ca and among microelements Fe, Mg, Mn i Zn. The toxic elements (Co, Ni, V i Pb) were present in concentrations below LOD (< 28 μg g−1). Based on the results obtained, the intake of essential elements consuming 100 and 20 gram of nuts per day was calculated and compared with their recommended daily intake. In the second part od this thesis one of the possible modern approaches in teaching chemistry for presenting plasma as physical phenomenon has been elaborated.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:497019
Study programmeTitle: Integrated undergraduate and graduate university study of Biology and Chemistry Education; specializations in: Integrated undergraduate and graduate university study of Biology and Chemistry Education
Course: Integrated undergraduate and graduate university study of Biology and Chemistry Education
Study programme type: university
Study level: integrated undergraduate and graduate
Academic / professional title: magistar/magistra edukacije biologije i kemije (magistar/magistra edukacije biologije i kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2018-12-31
Terms of useLicence In copyright icon
Created on2017-09-07 09:07:42