Features of raisins grape quality according to the drying process method used

Authors
Espindola, Rodrigo Sebastian; Gutierrez, Aida; Suero, Eduardo
Publication Year
2019
Language
English
Format
article
Status
Published version
Description
The province of San Juan produces the 90% of grape raisins in Argentina. The main drying method uses solar energy on drying yards built with gravel. In the recent years, others drying methods have appeared: dry on vine, drying on structures or drying on plastics tarps. The raisins made by different method have different features about color, appearance, flavor, incrustations, mold or other kind of quality problems. This study assessed the quality characters in grape raisins drying by gravel yard, plastic tarps, metal structures and drying on vine. Up to 32 raisin samples were evaluated about physic features. Also organoleptic evaluation and ochratoxin A analysis were made. The data were process by SPSS 15.0 software. Descriptive statistic, ANOVA and cluster analysis were calculated. The results indicated the main problems were raisins out of range, discoloration, out of regular form, irregular wrinkle, crystallization, capstems, damage and spots. The method with the most sugar crystallization and caramelization process was drying by gravel yard. Plastic drying method had the most amount of incrustations or strange materials. Dry on vine raisins do not show any sign of mold or insects. Most percentage of substandard grade are found in plastic drying method. A cluster analysis showed gravel and plastic drying method are closer each other and dry on vine is similar to structure drying method. Gravel method have the most ochratoxin A content. Dry on vine and structure drying method are both the best option for a good raisin quality made on a farm.
EEA San Juan
Fil: Espindola, Rodrigo Sebastian. INTA. Estación Experimental Agropecuaria San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ingeniería; Argentina
Fil: Gutierrez, Aida. Universidad Nacional de San Juan. Facultad de Ingeniería; Argentina
Fil: Suero, Eduardo. Universidad Nacional de San Juan. Facultad de Ingeniería; Argentina
Source
IJRDO - Journal of Agriculture and Research 5 (2) : 01-07. (February 2019)
Subject
Uvas de Mesa
Pasas
Secado
Dessert Grapes
Raisins
Drying
Ochratoxins
Ocratoxinas
Pasas de Uva
Access level
Open access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/5836