Evolucion en el tiempo de cafe molido en funcion del tipo de mezcla grado de molido y condiciones de envasado

  1. VILA MARTIN, MARIA AURELIA
Supervised by:
  1. Concepción Cid Canda Director
  2. María Paz de Peña Fariza Co-director

Defence university: Universidad de Navarra

Fecha de defensa: 17 November 2006

Committee:
  1. José Bello Gutierrez Chair
  2. Diana Ansorena Artieda Secretary
  3. Jesús Salmerón Egea Committee member
  4. María Dolores Ruiz López Committee member
  5. María José Villanueva Suárez Committee member

Type: Thesis

Teseo: 296741 DIALNET

Abstract

GROUND ROASTED COFFEE EVOLUTION ALONG THE TIME DEPENDING ON THE COFFEE BLEND, GRINDING GRADE AND PACKAGING CONDITIONS%&/María A. Vi la Martín. Faculty of Pharmacy, university of Navarra (Spain). 2006. Nowadays, the merchandizing of the ground coffee with an specific grinding grade for a method of brew coffee preparation is becoming more usual, like, ground coffee for espresso coffee machine. The general aim of this work was studying and comparing the evolution during the time of the ground roasted coffees qualities depending on coffee blend, grinding grade and packaging conditions during 180 days of storage at 25 °C. This evolution was studied specially through lipid fraction changes (principal responsible for the staling) and volatile compounds changes (responsible for the aroma quality). Besides, the ground coffee evolution influence on the espresso coffee was studied evaluating the sensorial quality. On one hand, the influence of the coffee blend (Brazilian Arábica 100% and Brazilian Arábica:indian cherry Robusta 80:20) and grinding grade (fine and coarse, both accurate to prepare espresso coffee brew) on the ground coffee evolution at vacuum pack during 180 days at 25 °C. on the other hand, the influence of the packaging conditions (control, at vacuum, nitrogen) on the finely ground Brazilian Arábica coffee 100% evolution during 180 days storaged at 25 °C. The process from green coffee to espresso coffee was carried out in the laboratory. Finally, coarsely ground Brazilian Arábica 100% was the coffee with the best global technical qualificatión at 180 days of the storage. The packaging with nitrogen did not show important advantages versus vacuum pack in the ground coffee storage. Besides, the ground coffee shelf life could be 90 days.