Quantitation of twelve metals in tequila and mezcal spirits as authenticity parameters.
In this paper the differentiation of silver, gold, aged and extra-aged tequila and mezcal has been carried out according to their metal content. Aluminum, barium, calcium, copper, iron, magnesium, manganese, potassium, sodium, strontium, zinc, and sulfur were determined by inductively coupled plasma optical emission spectrometry. The concentrations found for each element in the samples were used as chemical descriptors for characterization purposes. Principal component analysis, linear discriminant analysis and artificial neural networks were applied to differentiate types of tequila and mezcal. Using probabilistic neural networks 100% of success in the classification was obtained for silver, gold, extra-aged tequila and mezcal. In the case of aged tequila 90% of samples were successfully classified. Sodium, potassium, calcium, sulfur, magnesium, iron, strontium, copper and zinc were the most discriminant elements.
Ceballos-Magańa
Silvia Guillermina
SG
Department of Analytical Chemistry, Faculty of Chemistry, University of Seville, Seville, Spain.
Jurado
José Marcos
JM
Martín
María Jesús
MJ
Pablos
Fernando
F
D027882:Agave / Q000737:chemistry*; D000434:Alcoholic Beverages / Q000032:analysis* / Q000145:classification*; D005511:Food Handling / Q000379:methods; D008670:Metals / Q000032:analysis; D018547:Plant Stems / Q000737:chemistry; D013054:Spectrophotometry, Atomic
D008670:Metals