Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Chlorine Dioxide Treatment on Microbial Safety and Quality of Saury during Storage

이산화염소 처리가 꽁치의 저장 기간 중 미생물학적 안전성 및 품질변화에 미치는 영향

  • Kim, Sunkyoung (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Ma, Yuhyun (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Gu, Kyoungju (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Lee, Yunjung (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Kim, Eunjung (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Song, Kyung-Bin (Dept. of Food Science & Technology, College of Agriculture & Life Sciences, Chungnam National University)
  • 김선경 (충남대학교 식품공학과) ;
  • 마유현 (충남대학교 식품공학과) ;
  • 구경주 (충남대학교 식품공학과) ;
  • 이윤정 (충남대학교 식품공학과) ;
  • 김은정 (충남대학교 식품공학과) ;
  • 송경빈 (충남대학교 식품공학과)
  • Published : 2005.10.01
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Abstract

We determined the effect of chlorine dioxide ($ClO_{2}$) treatment on microbial growth and quality of saury. Saury samples were treated with aqueous $ClO_{2}$ at 3, 10, and 50 ppm. After the treatment, saury samples were stored at -20$^{\circ}C$ and 4$ ^{\circ}C$, respectively. Saury samples treated with $ClO_{2}$ had significantly lower total bacterial counts during storage. In particular, treatment of 50 rpm $ClO_{2}$ decreased total bacterial count most significantly among the $ClO_{2}$ treated saury samples. After 4 days, populations of total bacteria for the control reached 6.43 log CFU/g, while the sample treated with 50 ppm of $ClO_{2}$ had 5.47 log CFU/g at the 9th day of storage. $ClO_{2}$ treatment also delayed increase in the population of psychrotrophic bacteria on saury. The pH of saury samples decreased with increase of $ClO_{2}$ concentration. Volatile basic nitrogen (VBN) and thiobarbituric acid reactive substance (TBARS ) values of saury samples increased during storage, regardless of $ClO_{2}$ concentration. Sen-sory evaluation of saury samples showed that treatment with $ClO_{2}$ could improve the quality of saury. These results indicate that $ClO_{2}$ treatment could be useful in improving microbial safety and quality of saury.

꽁치를 이산화염소 용액 처리하여 미생물에 대한 살균 효과와 pH, 지방산패, 휘발성 염기 질소 함량, 관능평가에 대한 이산화염소의 농도별 효과를 측정하였다. 4$^{\circ}C$에서 저장한 꽁치의 초기 미생물수는 이산화염소의 농도에 따른 유의적인 차이 없이 1.8$\∼$2.4 log CFU/g이었으나,저장 기간이 경과함에 따라 뚜렷한 차이를 보여 저장 4일에 대조구의 총균수가 6.43 log CFU/g에 도달한 반면 50 ppm 이산화염소를 처리한 시료에서는 저장 9일에 5.47 log CFU/g의 총균수에 도달하였다 또한 4$^{\circ}C$에서 저장한 꽁치의 저온균수도 저장 기간이 경과할수록 유의적인 차이를 보이며 증가하였고, 저장 4일에 대조구와 3 ppm은 각각 6.72, 6.34 log CFU/g을 나타내었으나, 이산화염소 농도 10 ppm과 50 ppm은 5.02, 4.13 log CFU/g으로 이산화염소 용액의 농도가 증가함에 따라 저온균수가 감소하는 경향을 보였다. -20$^{\circ}C$에서는 저장 마지막 날까지 총균수의 큰 변화를 보이지 않아 신선도 유지가 가능하였다. 꽁치의 pH는 저장 6일에 급격히 증가하여 저장 9일에는 대조구의 pH 7.05, 50 ppm의 이산화염소 처리구에서는 6.73으로 측정되었으며, 휘발성 염기 질소 함량을 측정한 VBN 값은 저장 4일까지 큰 변화를 보이지 않다가, 저장 5일에 증가하여 높은 값을 나타내었다. -20$^{\circ}C$에서 저장한 꽁치의 pH와 VBN 값은 미생물수와 마찬가지로 큰 변화를 보이지 않았다. 지방산패 정도를 측정한 TBARS 값은 저장 기간에 따라 증가하였는데 이산화염소 농도에 따른 큰 차이는 없었고, 관능검사를 실시한 결과 이산화염소 용액의 농도가 증가할수록 평가 점수가 높음을 확인할 수 있었다 따라서 이산화염소 용액의 처리가 꽁치의 미생물학적 안전성을 증가시켜 유통기간을 증대한다고 판단된다.

Keywords

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