Changes in the quality of frozen vegetables during storage

저장기간에 따른 동결채소의 품질 변화

  • Received : 2013.03.28
  • Accepted : 2013.06.05
  • Published : 2013.06.30


This study was conducted to assess the possibility of preserving frozen vegetables (Aster scaber, soybean sprouts, Chinese cabbage, green pumpkin, and Welsh onion) for a long period and of using them after such storage by measuring changes in quality due to their preservation. Various freshly harvested vegetables were blanched under optimal conditions (that were determined in a preliminary experiment), quick-frozen at $-40^{\circ}C$ for 24 h, and stored at $-20^{\circ}C$. The change in the chromaticity of the frozen A. scaber, soybean sprouts, Chinese cabbage, green pumpkin, and Welsh onion did not vary. The hardness of the frozen A. scaber, green pumpkin, Chinese cabbage and Welsh onion did not change during the preservation period, whereas the hardness of the cotyledon and hypocotyl of the soybean sprouts significantly increased on the sixth month of their storage. The total bacterial counts of the A. scaber during the preservation period remained constant at $10^3$ CFU/g, whereas those of soybean sprouts, Chinese cabbage, green pumpkin, and Welsh onion decreased slightly to $10^2$ CFU/g. Coliform was not detected in any of the samples. The sensory evaluation showed that the preservation period that was used in this study did not significantly affect the marketability of the frozen vegetables. Therefore, it was considered that A. scaber, soybean sprouts, Chinese cabbage, green pumpkin, and Welsh onion can be safely preserved by freeze-storing them for up to 12 months.


Supported by : 농림수산식품부


  1. Kim JY, Kwon IK, Ha SY, Hong CH (2005) Changes of contamination level of Listeria spp. during the processing environments in Kimbab restaurants. J Food Hyg Safety, 20, 232-236
  2. Bahk GJ, Chun SJ, Park KH, Hong CH, Kim JW (2003) Survey on the foodborne illness experience and awareness of food safety practice among Korean consumers. J Food Hyg Safety, 18, 139-145
  3. Yun SH, Yoon JY, Lee SR (1996) Retail distribution temperature and quality status of fried-frozen korean meat ball products. Korean J Food Sci Technol, 28, 657-662
  4. Roh PU, Bin SO (2001) Temperature control of freezers and refrigerators in department stores & supermarkets. Korean J Env Hlth Soc, 27, 66-74
  5. KFDA (2009) Food Code. Korea Food and Drug Administration. Seoul, Korea.
  6. Jeong JW, Jeong SW, Park KJ (2003) Changes in internal pressure of frozen fruits by freezing methods. Korean J Food Preserv, 10, 459-465
  7. Ulla K, Helle JM (1999) Changes in texture, microstructure and nutritional quality of carrot slices during blanching and freezing. J Sci Food Agric, 79, 1747-1753<1747::AID-JSFA429>3.0.CO;2-B
  8. Favell DJ (1998) A comparison of the vitamin C content of fresh and frozen vegetables. J Chem, 62, 59-64
  9. Lim JH, Seong JM, Park KJ, Jeong JW (2008) Effect of freezing and thawing conditions on the quality of mashed red pepper. Korean J Food Preserv, 15, 675-681
  10. Chung HD, Yoo JG, Choi YH (1999) Effect of microwave blanching on the improvement of the qualities of immature soybean. J Korean Soc Food Sci Nutr, 25, 1298-1303
  11. Lee MJ, Yoon KS (2009) Comparison of the perception of frozen processed food, food labeling and nutrition labeling between employees and non-employees in the frozen food industry. J East Asian Soc Dietary life, 19, 533-543
  12. Park SH, Kim KS, Yoo YA, Lee JK, Jung SK, Han KY, Kim MS (2010) Antibiotic resistance patterns of enterococcus spp. isolated from commercial frozen foods. J Food Hyg Safety, 25, 122-128
  13. Lee HE, Lim CI, Do KR (2007) Changes of characteristics in red pepper by various freezing and thawing methods. Korean J Food Preserv, 14, 227-232
  14. aT (2009) Food Code. Korea Agro-Fisheries & Food Trade Corporation. Seoul, Korea.
  15. Lee HO, Kim JY, Kim GH, Kim BS (2012) Quality characteristics of frozen Aster scaber according to various blanching treatment conditions. J Korean Soc Food Sci Nutr, 41, 246-253
  16. Lee HO, Lee YJ, Kim JY, Yoon DH, Kim BS (2011) Quality characteristics of frozen welsh onion(Allium fistulosum L.) according to various blanching treatment conditions. Korean J Food Sci Technol, 43, 426-431
  17. The institute of traditional Korean food (2002) The beauty of Korean food: with 300 best-loved recipes. Hollym, Seoul, p 219
  18. Penfield MP, Campbell, AM (1990) Experimenta food science. Academic Press.
  19. Kim YH, Lee DS, Kim JC. Effect of blanching on textural properties of refrigerated and reheated vegetables (2004) Korean J Soc Food Sci Nutr, 33, 911-916
  20. Lee HS (1995) The measurement methods of the textural characteristics of fermented vegetables. Korean J Soc Food Sci, 11, 83-91
  21. Han YS, Park JY (2001) The microbiological properties of frozen Bibimbap namul during storage. Korean J Food Cookery Sci, 17, 149-155
  22. Lim JH, Choi JH, Hong SI, Jeong MC, Kim DM (2005) Mild heat treatments for quality improvement of fresh-cut potatoes. Korean J Food Preserv, 12, 552-557

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