Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Quality Characteristics Influenced by Different Packaging Materials in Washed Potatoes through an Integrated Washing System

통합세척시스템 활용시 포장재 종류별 세척감자의 품질 특성

  • Kim, Su Jeong (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Sohn, Hwang Bae (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Mekapogu, Manjulata (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Kwon, Oh Keun (National Institute of Horticultural & Herbal Science, RDA) ;
  • Hong, Su Young (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Nam, Jung Hwan (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Jin, Yong Ik (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Chang, Dong Chil (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Suh, Jong Taek (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Jeong, Jin Cheol (Highland Agriculture Research Institute, National Institute of Crop Science, RDA) ;
  • Kim, Yul Ho (Highland Agriculture Research Institute, National Institute of Crop Science, RDA)
  • 김수정 (국립식량과학원 고령지농업연구소) ;
  • 손황배 (국립식량과학원 고령지농업연구소) ;
  • ;
  • 권오근 (국립원예특작과학원 화훼과) ;
  • 홍수영 (국립식량과학원 고령지농업연구소) ;
  • 남정환 (국립식량과학원 고령지농업연구소) ;
  • 진용익 (국립식량과학원 고령지농업연구소) ;
  • 장동칠 (국립식량과학원 고령지농업연구소) ;
  • 서종택 (국립식량과학원 고령지농업연구소) ;
  • 정진철 (국립식량과학원 고령지농업연구소) ;
  • 김율호 (국립식량과학원 고령지농업연구소)
  • Received : 2016.02.11
  • Accepted : 2016.04.18
  • Published : 2016.06.30
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Abstract

This study was performed to investigate the effect of packaging materials on quality characteristics of washed potatoes such as Hunter's a value, chlorophyll and potato glycoalkaloids (PGA) content during their storage for 15 days. Packaging methods were evaluated into five ways: no packaging (NP, positive control), paper bag (PB, negative control), onion net (ON), transparent oriented to polypropylene without hole (TP), opaque oriented polypropylene with 4 holes (OP). Hunter's a values of washed potatoes showed minus in NP and TP after 12 days storage, whereas all plus values were observed in those of PB, ON, and OP. Total chlorophyll content of washed potatoes was the highest in no packaging at 15 days after storage. The PGA content of washed potatoes showed low levels in flesh part (below $5mg/100g{\cdot}FW$) as well as in peel part ($4.5-9.3mg/100mg{\cdot}FW$) in all packagings up to 15 days after storage.

우리나라에서 가장 많이 유통되고 있는 감자 품종인 '수미'를 사용하여 세척감자의 실용화를 위한 적정 포장재를 개발하고자 본 연구를 수행하였다. 세척감자의 포장재에 따른 품질특성의 변화를 구명하기 위해 무포장(NP, positive control), 종이봉투(PB, negative control), 양파망(ON), 무공투명비닐백(TP), 유공불투명비닐백(OP) 총 5종의 포장재를 대상으로 Hunter 값, 색차값(${\Delta}E$ value), 총 엽록소 및 글리코알카로이드(PGA) 함량 등 품질 특성을 평가하였다. 그 결과, Hunter a값(적색도/녹색도)은 세척감자 저장 12일째에 양파망(ON)과 무공투명비닐백(TP)에서 -a값을 나타내 녹색도로 바뀌었다. 색차값은 무포장(NP)에서 높게 나타나 다른 포장재에 비해 녹화가 심했다. 총 엽록소 함량은 저장기간에 따라 뚜렷하게 증가하는 경향을 보였으며, 무포장에서 저장 15일째 가장 큰 증가를 보였다. 세척감자의 괴경 내피 부위의 PGA 함량은 모든 처리에서 저장 15일째 5 mg/100 g 이하로 낮았으며, 외피 부위에서도 4.5-9.3 mg/100 g으로 국제연합식량농업기구(FAO) 권장기준(20 mg/100 g)보다 낮았다. 녹화와 각 품질평가 요인의 상관성을 구명하기 위해, 피어슨 상관분석을 한 결과, 엽록소 함량은 색차값(0.90786)과 높은 정의 상관관계를 보였으나, Hunter a값은 색차값(-0.86021), 엽록소 함량(-0.85196)과는 높은 부의 상관관계를 보였다. 글리코알카로이드(PGA)와 녹색도 품질평가 요인과는 상관관계가 없는 것으로 나타났다. 이러한 엽록소 함량, 색도 색차와 PGA 함량 등의 결과를 바탕으로 녹화와 소비자 선호도를 고려할 때 평가항목에서 우수한 유공불투명포장재가 세척감자 소포장재로 유망할 것으로 판단되었다.

Keywords

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