Migracija teških metala iz čeličnog posuđa uslijed pripreme i čuvanja hrane

master's thesis

• Title (english): Migration of heavy metals from steel dishes due to preparation and storage of food
• Author: Martina Marić
• Mentor: Anita Štrkalj (mentor)
• Mentor: Zoran Glavaš (komentor)
• Committee member: Damir Hršak (predsjednik povjerenstva)
• Committee member: Zoran Glavaš (član povjerenstva)
• Committee member: Ivan Brnardić (član povjerenstva)
• Committee member: Ljerka Slokar Benić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2022-11-23, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Izrada i primjena posuđa od metala, posebno čelika, omogućila je bržu i jednostavniju pripremu
hrane. Međutim, pri pripremi hrane posuđe je izloženo visokim temperaturama. Osim toga,
hrana zbog kiselog ili lužnatog pH također utječe na posuđe. Budući da se posuđu od čelika pri
proizvodnji dodaju određeni elementi radi poboljšavanja svojstava gotovog proizvoda, postoji
mogućnost migracije navedenih elemenata u hranu.
U ovom radu praćena je migracija teških metala (As, Cd, Cr, Ni, Pb i Zn) u ovisnosti o
temperaturi i vremenu kontakta s hranom. Za ispitivanje su korištene dvije modelne otopine
koje su predstavljale kiselu i lužnatu hranu. Također su korištene i dvije vrste posuđa: posuđe
od nehrđajućeg čelika i posuđe od ugljičnog nelegiranog čelika s prevlakom od emajla.
Dobiveni rezultati su pokazali da uslijed kontakta posuđa s hranom dolazi do migracije
ispitivanih elemenata. Koncentracija migriranih elemenata ovisi o vremenu kontakta posuđa s
hranom, pH vrijednosti hrane, temperaturi i starosti posuđa.

Abstract (english)

The production and use of dishes made of metal, especially steel, enabled faster and simpler
food preparation. However, dishes are exposed to high temperatures when preparing food. In
addition, food due to acidic or alkaline pH also affects dishes. Since certain elements are added
during the production of steel dishes in order to improve the properties of the finished product,
there is a possibility of migration of these elements into food.
In this graduate thesis, the migration of heavy metals (As, Cd, Cr, Ni, Pb and Zn) depending
on the temperature and time of contact with food was monitored. Two model solutions
representing acidic and alkaline foods were used for the research. Two types of dishes were
also used: stainless steel dishes and enamel-coated carbon steel dishes. The obtained results
showed that there is a migration of the analysed elements due to the contact of dishes with
food. The concentration of migrated elements depends on the time of contact of the dishes with
food, the pH value of the food, the temperature, and the age of the dishes.

• Keywords: Ključne riječi: čelik; posuđe; teški metali; migracija iona
• Keywords (english): steel; dishes; heavy metals; ion migration
• Language: croatian
• URN:NBN: urn:nbn:hr:115:535028
• Study programme: Title: Graduate study program Metallurgy; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka metalurgije (magistar/magistra inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-11-11 11:58:36