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IDENTIFICAÇÃO DE ADULTERAÇÃO EM ÓLEOS DE OLIVA: PROBLEMATIZANDO A INTRODUÇÃO À ESPECTROMETRIA DE MASSAS

2018; Brazilian Chemical Society; Volume: 2018; Linguagem: Inglês

10.21577/0100-4042.20170256

1678-7064

Angélica Priscila Parussolo Tonin, Gabrielly Ribeiro Carneiro, Marcos Ribeiro, Jaime da Costa Cedran, Valquíria Aparecida da Silva, Eduardo C. Meurer,

Agricultural and Food Sciences

SPECTROMETRY.This work propose the development of an experiment that may be used for the teaching of chemistry for undergraduate students in general, using the analysis of olive oil and soybean oil toward the direct injection electrospray ionization Mass Spectrometry -DI-MS/MS with 18-crown-6 as organic modifier.Firstly, olive oil was analyzed from two different brands, one of reputed brand and the other of popular brand and lower price.Soybean oil of popular brand was also analyzed in order to search possible similarities in the components of these oils and to search adulterations of olive oil with soybean oil.The mass spectra were obtained in positive ion mode of analysis, and allowed us to observe characteristic ions of soybean oil, olive oil, and identify the adulterated olive oil.This simple experiment of easy development may be applied in any institution which has a mass spectrometer with electrospray ionization.In addition, with the use of the experiment, the teacher can illustrate general chemistry concepts such as: molecular mass, preparation of solutions, oxidation, and acid-base reactions.