Določanje mineralov v listnem ohrovtu

diplomsko delo

Kristina Jordan (Author), Irena Kralj Cigić (Mentor)

Abstract

Naše telo potrebuje za normalno delovanje poleg drugih hranilnih snovi, tudi mnoge minerale. Tem pravimo esencialni minerali. Delijo se na makro- in mikrominerale. Obe skupini sta enako pomembni, vendar so makrominerale potrebni v večjih količinah (več kot 100 mg/dan), medtem ko potrebujemo mikrominerale zgolj v manjših količinah (manj kot 100 mg/dan). Med makrominerale uvrščamo kalcij, magnezij, fosfor, natrij, kalij in žveplo. Železo, cink, baker, selen, krom, jod, fluor, mangan, molibden, vanadij in kobalt pa spadajo med mikrominerale. V majhnih količinah potrebujemo tudi arzen, bor, nikelj in silicij. S pestro prehrano najlažje pokrijemo dnevne potrebe po mineralih. Celokupno vsebnost mineralov določamo kot določitev pepela, vsebnost posameznih mineralov pa lahko določamo s kompleksometrično titracijo, kolorimetrično, z atomsko absorbcijsko ali emisijsko spektroskopijo in z masno spektrometrijo z induktivno sklopljeno plazmo. Z zadnjo navedeno tehniko sem določala vsebnost posameznih mineralov v zelenem in rdečem listnem ohrovtu. Masna spektrometrija z induktivno sklopljeno plazmo se uporablja kot občutljiva tehnika za kovine in več nekovin v tekočih vzorcih pri zelo nizkih koncentracijah (v območju ng do pg). Dobljene rezultate sem primerjala z literaturnimi podatki. Sklepala sem, da so v literaturi podane vsebnosti za kodrolistni rdeči ohrovt. Vsebnost mineralov pri kodrolistnem rdečem in kodrolistnem zelenem ohrovtu so v zaporedju od najvišje do najnižje: Ca, K, Mg, Na, Fe in Zn, kar se ujema z literaturnimi podatki.

Keywords

listni ohrovt;minerali;določanje mineralov;analizne metode;masna spektrometrija;induktivno sklopljena plazma;diplomske naloge;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher:	[K. Jordan]
UDC:	543.51(043.2)
COBISS:	90766851
Views:	226
Downloads:	21
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Determination of minerals in kale
Secondary abstract:	In addition to other nutrients, our body needs many minerals to function normally. We call these essential minerals. They are divided into macro- and microminerals. Both groups are equally important, but macrominerals are needed in larger quantities (more than 100 mg/day), while microminerals are only needed in smaller quantities (less than 100 mg/day). Macrominerals are calcium, magnesium, phosphorus, sodium, potassium and sulfur. Iron, zinc, copper, selenium, chromium, iodine, fluorine, manganese, molybdenum, vanadium and cobalt are among the microminerals. We also need arsenic, boron, nickel and silicon in small quantities. A varied diet is the easiest way to cover the daily needs for essential minerals. The total mineral content is determined as the determination of ash content, while the content of individual minerals can be determined by complexometric titration, colorimetrically, atomic absorption or emission spectroscopy, and inductively coupled plasma mass spectrometry. Using the latter technique, I determined the content of individual minerals in green and red kale. Inductively coupled plasma mass spectrometry is used as a sensitive technique for metals and multiple non-metals in liquid samples at very low concentrations (ng to pg range). I compared the obtained results with data from the literature. I concluded that the contents given in the literature refer to curly red kale. The values of mineral concentrations in curly red and curly green kale follow this order from highest to lowest: Ca, K, Mg, Na, Fe and Zn, which corresponds to the data from the literature.
Secondary keywords:	kale;mineral determination;inductively coupled plasma;mass spectrometry;
Type (COBISS):	Bachelor thesis/paper
Study programme:	1000374
Thesis comment:	Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, VSŠ Kemijska tehnologija
Pages:	28 str.
ID:	14075175