Spektrofotometrijsko i kemometričko razdvajanje apsorpcijskih spektara pri određivanju azo bojila u dijetalnom sirupu

master's thesis

• Title (english): Spectrophotometric and chemometric separation of absorption spectra for determination of azo dyes in diet syrup
• Author: Marina Palčić
• Mentor: Zorana Grabarić (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Chemistry and Biochemistry); (Laboratory for General and Inorganic Chemistry and Electroanalysis); Zagreb
• Defense date and country: 2007-11-09, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

Za određivanje sintetskih azo boja u prehrambenim proizvodima u ovom je radu korištena rezolucijska metoda omjera signala. Metoda je primijenjena na dijetalni sirup. Budući da su sintetske organske boje koje se koriste kao prehrambeni aditivi potencijalno toksične i kancerogene, a njihova uporaba zbog toga zakonski regulirana, potrebno je kontrolirati koncentraciju prehrambenih boja u hrani. Prema rezultatima ispitivanja pokazalo se da se korištenjem metode omjera signala iz preklopljenih apsorpcijskih spektara mogu odrediti vrlo male koncentracije analita (μM) u uzorku u kojem se nalaze tri komponente. Princip metode je uklanjanje jedne komponente iz globalnog signala pri čemu je maksimum spektra druge komponente linearno proporcionalan koncentraciji traženog analita.

Abstract (english)

The signal ratio resolution method was applied in this paper for determination of synthetic azo dyes in food products. The method was applied to diet syrup. Since synthetic organic dyes used as food additives are potentially toxic and carcinogenic and their application is under governmental regulations, their concentration in food must be controlled. Results of this work show that by using signal ratio resolution method for separation of absorption spectra small concentrations (μM) of analytes in ternary mixture can be determined. Method is based on separation of one component from global signal, revealing the contribution of other components in peak-shaped form that is linearly proportional to the analyte concentration.

• Keywords: azo bojila; metoda omjera signala; sirup; spektrofotometrija
• Keywords (english): azo dyes; signal ratio method; spectrophotometry; syrup
• Language: croatian
• URN:NBN: urn:nbn:hr:159:597629
• Study programme: Title: Food Technology; specializations in: Food Engineering; Course: Food Engineering; Study programme type: university; Study level: graduate; Academic / professional title: diplomirani inženjer prehrambene tehnologije; smjer prehrambeno inženjerstvo (diplomirani inženjer prehrambene tehnologije; smjer prehrambeno inženjerstvo)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-09-05 12:59:48