magistrsko delo
Maša Špes (Author), Janja Kristl (Mentor), Vilma Šuštar (Co-mentor)

Abstract

Namen magistrske naloge je bil določiti vsebnosti skupnega cianida in podati minimalno količino živila, ki predstavlja tveganje za zastrupitev s cianidom. Za določanje koncentracije skupnega cianida smo kot referenčno metodo uporabili destilacijo, ki smo jo nato primerjali s kislinsko hidrolizo. Rezultate smo primerjali z linearno regresijo in napako ocenili kot koren povprečnega kvadratnega odklona (RMSE). Ne glede na uporabljeno metodo smo določili najnižjo vsebnost cianida v fižolu 0,05 mg/kg, najvišjo pa v olupku pasijonke 885 mg/kg. Izmed analiziranih koščic je z najvišjo vrednostjo izstopala divja češnja GB (201 mg/kg), najnižjo smo izmerili v avokadu (2,49 mg/kg). Ugotovili smo, da je pri določanju koncentracije HCN lahko veliko vzrokov variabilnosti, od načina priprave vzorca do uporabljenega postopka, predvsem učinkovitost razgradnje cianogenih glikozidov. Rezultati, dobljeni po metodi destilacije, so odstopali od rezultatov, dobljenih po metodi kislinske hidrolize. V vzorcih so bile prisotne moteče spojine, ki so vplivale na končni rezultat.

Keywords

cyanogenic glycosides;cyanide;toxins;analytical methods;

Data

Language: English
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FKBV - Faculty of Agriculture
Publisher: [M. Špes]
UDC: 543:543.632.656(043)=163.6
COBISS: 74561027 Link will open in a new window
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Other data

Secondary language: Slovenian
Secondary title: Comparison of analytical cyanide determination methods in plant samples
Secondary abstract: The aim of the master's thesis was to determine the total content of cyanide and to indicate the minimum amount of food that presents a risk of cyanide poisoning. Distillation was used as a reference method to determine the total cyanide concentration, which was then compared with acid hydrolysis. The results obtained were compared using linear regression and the error was estimated as a root mean square deviation (RMSE). The lowest cyanide content was found in beans (0.05 mg/kg) and the highest in passion fruit peels (885 mg/kg). Of the pits studied, wild cherry GB stood out with the highest value (201 mg/kg), and the lowest was measured in avocado (2.49 mg/kg). We have found that there may be many causes of variability in the determination of HCN concentration, ranging from the method of sample preparation to the analytical procedure used, especially the efficiency of degradation of cyanogenic glycosides. The results of the distillation method differed from the results of the acid hydrolysis method. We also found that there were interferences in the samples that affected the result.
Secondary keywords: cianogeni glikozidi;cianidi;toksini;analizne metode;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kmetijstvo in biosistemske vede
Pages: IX, 43, [1] f.
ID: 13252807