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Effect of Different Pretreatments on the Quality of Frozen Strawberries

HU Li-ju, MENG Xian-jun*, SUN Xi-yun, LI Bin, YAN Ting-cai, LI Li   

  1. College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
  • Online:2014-11-25 Published:2014-12-09

Abstract:

Pretreatments with aqueous solutions of sugar and calcium chloride were applied to slow down the quality
deterioration of strawberries during frozen storage. Changes in strawberry quality stored at –18 ℃ were investigated with
respect to vitamin C (VC), drip loss, conductivity, firmness, soluble solids and total acid. The results showed that the
strawberries pretreated by 20% sugar solution for 20 min had a lower VC loss rate, smaller changes in soluble solids and
conductivity and a slower decrease in total acid, which revealed a significant difference (P < 0.05) when compared with other
treatments. In addition, the strawberries pretreated by 3% calcium chloride solution for 15 min had a lower drip loss and a
smaller change in firmness, showing an extremely significant difference (P < 0.01) when compared with other treatments.

Key words: strawberries, treatment, frozen storage, quality

CLC Number: