Monitoring of Color Changes and Organoleptics Properties of Chungkookjang Products during Storage for Shelf-life Establishment

청국장 제품의 유통기한 설정을 위한 저장중의 색도변화 및 관능적 특성 monitoring

  • 김동명 ((주)도들샘) ;
  • 김성호 (경북과학대학 바이오식품계열) ;
  • 이진만 (경북과학대학 바이오식품계열) ;
  • ;
  • 강선철 (대구대학교 식품.생명.화학공학부)
  • Published : 2005.06.30

Abstract

In order to examine the changes of commercial value during storage conditions and shelf-life of Chungkookjang, response surface methodology of SAS program was applied to monitor orgenoleptic properties and color changes to determine optimum storage conditions. Lightness (L) value of vacuum-packed Chungkookjang showed under the 1% significance probability with high influence in all conditions such as sterilized temperature, storage time and storage temperature. Redness (a) value of vacuum-packed Chungkookjang was increased during highly sterilized and storage temperatures, and was individually influenced. One of the generally packed sample also showed that significance value was influenced under 10%, during high storage temperature. Yellowness (b) value of vacuum-packed Chungkookjang showed the significance probability under 1% during storage time and temperature, and under 5% during sterilized temperature. Also, stational point showed saddle type in both packaging samples. In case of vacuum-packed Chungkookjang, compatibility of odor was influenced by sterilized temperature under 10% significance probability. But generally packed samples have an effect on storage time under 1% significance probability effect on storage time, and sterilized temperature under 5%. In case of vacuum-packed Chungkookjang, compatibility of taste was highly concerned with storage time under 1% significance probability, whereas generally packed samples were concerned with storage temperature under 5% significance probability. Overall palatability of vacuum-packed samples showed maximum value of 5.15 on sterilized temperature ($61.92^{\circ}C$), storage temperature ($6.79^{\circ}C$) and storage time (56.48 days) during storage.

청국장 제품의 저장조건 및 유통기간 중에 상품성의 변화를 조사하기 위하여 살균온도, 저장온도 및 저장기간별로 관능적 특성과 색도의 변화를 측정하여 SAS program의 반응표면분석법으로 monitoring하였다. 진공 포장한 청국장의 명도(L)값은 살균온도, 저장기간 및 저장온도 모두 1% 이내에서 유의확률을 가지는 것으로 나타나 세 조건 모두가 명도에 영향성이 높은 것으로 나타났다. 적색도(a)값은 진공포장의 경우 살균온도와 저장온도가 높을수록 증가하며 각기 독립적으로 영향을 미치는 것으로 나타났다. 일반포장의 경우, 저장온도가 높을수록 유의적 값(10% 이내)이 영향을 미치는 것으로 나타났다. 황색도(b)값은 진공 포장한 경우, 저장기간과 저장온도는 1% 이내에서, 살균온도의 경우 5% 이내에서 유의확률을 가지는 것으로 나타났다. 또한 두 포장군 모두 정상점이 안장점의 형태로 나타났다. 관능적 평가 중 외관에 대한 적합성은 두 포장군 모두 저장온도가 1% 이내의 유의확률로 결정적인 영향을 주었고, 냄새에 대한 적합성은 진공포장의 경우 살균온도가 10% 이내의 유의확률로서 관련성이 있었으나, 일반포장은 저장기간이 1% 이내, 살균온도가 5% 이내 유의확률로서 영향성이 있는 것으로 나타났다. 맛에 대한 적합성에서는 진공포장한 경우 저장기간이 1% 이내의 높은 관련성이 있었고, 일반포장은 저장온도가 5% 이내의 유의확률로서 관련성이 있었다. 관능검사의 전체적인 평가에서는 진공포장의 경우 살균온도가 $61.92^{\circ}C$, 저장 온도 $6.79^{\circ}C$, 저장기간 56.48일에서 5.15로 최대 값을 나타내었다.

Keywords

References

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