Effect of Thawing Methods on Quality of Frozen Ripe Kaew Kamin Mango

Authors

  • Thawanrat Sumrit คณะเทคโนโลยีการเกษตรและอาหาร มหาวิทยาลัยราชภัฏพิบูลสงคราม
  • Voraluck Suriwong คณะเทคโนโลยีการเกษตรและอาหาร มหาวิทยาลัยราชภัฏพิบูลสงคราม
  • Patcharaporn Inrirai คณะเทคโนโลยีการเกษตรและอาหาร มหาวิทยาลัยราชภัฏพิบูลสงคราม
  • Surintraporn Swaeng-ngam คณะเทคโนโลยีการเกษตรและอาหาร มหาวิทยาลัยราชภัฏพิบูลสงคราม
  • Araya Bunsak คณะเทคโนโลยีการเกษตรและอาหาร มหาวิทยาลัยราชภัฏพิบูลสงคราม
  • Yanisa Chindaluang คณะเทคโนโลยีการเกษตรและอาหาร มหาวิทยาลัยราชภัฏพิบูลสงคราม

Abstract

The objectives of this research were to investigate the freezing of ripe kaew kamin mango pulp and the effect of thawing using water thawing, air thawing, and infrared thawing on the quality of the frozen ripe kaew kamin mango. The ripe mango flesh were slowly frozen at -38 °C in a chest deep freezer for 156±2.64 minutes, and the freezing rate was 0.27±0.05°C/min. Then, the samples were defrosted using three different techniques: water thawing, air thawing, and 250 watts of infrared thawing. The results showed that the thawing times were 15, 25, and 8 minutes, respectively. Weight losses of mango pulp after the thawing were 3.09±0.14, 4.05±0.43, and 2.34±0.36 % wt, respectively. In terms of color quality, the samples had L* values (lightness) of 44.27±1.21, 44.22±0.00, and 44.56±0.00, the a* values (redness) of 2.63±0.01, 2.58±0.00, and 2.62±0.01, and the b* values (yellowness) were 33.83±0.02, 31.81±0.01, and 33.82±0.00, respectively.         In addition, the pH values were 4.96, 4.93, and 5.08, respectively. The total soluble solids were 11.53±0.06, 11.23±0.05 and 11.86±0.05 °Brix, respectively. The firmness values after thawing were 1.40±0.57, 1.70±0.63, and 2.27±0.27 N, respectively. When compared to the fresh sample, infrared thawing had minimum effect on changes in the quality of frozen ripe mango, in which the firmness of ripe mangos after thawing was less than about 64.02%. Additionally, sensory evaluation showed that the ripe mango pulp after infrared thawing obtained the highest overall acceptability score (7.40±0.51 points), which was significant difference among the assessed samples. Keywords :  ripe mango pulp ; thawing ; drip loss; infrared 

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Published

2023-05-11