magistrsko delo
Kristina Gluhak (Author), Maša Islamčević Razboršek (Mentor), Brigita Tepuš (Co-mentor)

Abstract

Krmne mešanice so sestavljene iz organskih in anorganskih materialov. Zakonodaja zahteva, da so zmesi krmnih mešanic po sestavi homogene in da posamezne komponente med zmesmi ne povzročajo kontaminacije krmnih mešanic med sabo, zato je potrebno izvesti testa homogenosti in navzkrižne kontaminacije. Kot markerji se lahko uporabljajo posamezna barvila (na primer metilvijolično), antibiotiki, kovine, magnetni delci itd. Osnovni namen raziskav v okviru magistarskega dela je razvoj analizne metode, ki bo po statistični obdelavi rezultatov omogočala kvantitativno določanje markerja v različnih krmnih mešanicah. Proučevali smo manganov(II) oksid (MnO) kot možni marker. V vzorcih koruze in krmne mešanice smo analizirali vsebnost petih kovin: bakra, kalija, mangana, fosforja in cinka. Vsebnost kovin smo določili z induktivno sklopljeno plazmo z optično emisijsko spektrometrijo (ICP-OES). Pridobljene rezultate kemijske analize smo komometrično obdelali. Izbrane kovine smo analizirali na vzorcih podjetja Perutnina Ptuj d.d. Izvedli smo validacijo analizne metode in ovrednotili merilno negotovost. Ugotovili smo, da je metoda določanja izbranih kovin v koruzi in krmni mešanici z ICP-OES linearna, natančna, točna in primerna za ovrednotenje vsebnosti izbranih kovin v navedenih vzorcih.

Keywords

homogenost;koruza;krma;marker;validacija;merilna negotovost;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [K. Gluhak]
UDC: 543.4.062:633.15(043.2)
COBISS: 22657046 Link will open in a new window
Views: 727
Downloads: 74
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Other data

Secondary language: English
Secondary title: Determination of the optimal marker of compound feed homogeneity
Secondary abstract: Compound feed consists of organic and inorganic materials. The legislature requires that the structure is homogeneous and that individual components in mixture do not cause mutual contamination. Because of that, homogeneity and cross-contamination test is performed. Markers are used for certain dyes (e.g. methyl violet), antibiotics, metals, magnetic particles, etc. The main purpose of the master's thesis is to develop experimental method, which will allow the quantitative determination of markers in different types of forage by the statistical processing of the results. The studied marker example is the manganese (II) oxide (MnO). In the samples of maize and forage, content analysis of five elements is performed: copper, potassium, manganese, phosphorus, zinc. The metal content is determined by ICP-OES (Inductively coupled plasma optical emission spectroscopy). The obtained results of the chemical analysis are processed chemometrically. Selected metals were analyzed in the samples provided by Perutnina Ptuj d.d. Analytical method was validated and measurement uncertainty was determined. We have found that the method of determination of selected metals in maize and forage with ICP-OES is linear, precise, accurate and appropriate for determining the content of selected metals in the observed samples.
Secondary keywords: ICP-OES;Homogeneity;Corn;Compound feed;Marker;Validation;Measurement uncertainty;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: XI, 51 str.
ID: 11216669