Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
권호 표지

Elimination of Heavy Metals(Pb, Cd) by Steaming and Roasting Conditions of Polygonatum odoratum Roots

둥굴레 근경의 증자 및 볶음조건에 따른 중금속(Pb, Cd) 제거 특성

  • Kim Kyung-Tae (Department of Food Science and Technology, Kyungpook National University of Daegu) ;
  • Noh Jungeun (Department of Food Science and Technology, Kyungpook National University of Daegu) ;
  • Lee Jungeun (Department of Food Science and Technology, Kyungpook National University of Daegu) ;
  • Kim Jung-Ok (Department of Food Science and Technology, Kyungpook National University of Daegu) ;
  • Lee Gee-Dong (DG-Traditional Bio-Materials Industry Center) ;
  • Kwon Joong-Ho (Department of Food Science and Technology, Kyungpook National University of Daegu)
  • 김경태 (경북대학교 식품공학과) ;
  • 노정은 (경북대학교 식품공학과) ;
  • 이정은 (경북대학교 식품공학과) ;
  • 김정옥 (경북대학교 식품공학과) ;
  • 이기동 (대구신기술사업단 전통생물소재산업화센터) ;
  • 권중호 (경북대학교 식품공학과)
  • Published : 2005.06.01
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Abstract

Response surface methodology(RSM) was applied to monitor the elimination rate of heavy metals(Pb, Cd) and soluble solids depending on the steaming and roasting conditions of Polygonatum odoratum roots. Experiments of 16 different steaming and roasting conditions based on a central composite design for steaming time($60{\sim}180$ min), roasting temperature($110{\sim}150^{\circ}C$), and roasting time($10{\sim}50$ min) were conducted, thereby predicting the steaming and roasting conditions for the maximal responses; soluble solids($71.47\%$) at 65.24 min, $126.93^{\circ}C$ and 37.58 min; Pb removal rate($18.87\%$) at 71.23 min, $119.81^{\circ}C$ and 24.35 min; Cd removal rate($50,85\%$) at 160.89 min, $126.43^{\circ}C$ and 15.81 min, respectively. The optimum conditions estimated by RSM for the maximized values of soluble solids and heavy metal elimination rates were $165{\sim}180$ min of steaming time, $120{\sim}135^{\circ}C$ of roasting temperature, and $30{\sim}45$ min of roasting time, respectively. These estimated values were in agreement with those measured by real experiments.

둥굴레 근경의 증자 및 열처리 중 수용성 고형분 및 Pb, Cd 제거율의 변화를 확인하기 위하여 반응표면분석(RSM)을 활용하였다. 중심합성계획법에 따라 증자시간($60{\sim}180$ min), 볶음온도($110{\sim}150^{\circ}C$) 및 볶음시간($10{\sim}50$ min)을 달리하여 16구간으로 제조된 시료의 수용성 고형분 함량, Pb 및 Cd 제거율을 측정하고 회귀분석을 실시하였다. 예측된 가용성 고형분의 최대값은 $71.47\%$ 이었으며, 이때의 증자 및 볶음조건은 증자시간 65.24분, 볶음온도 $126.93^{\circ}C$ 및 볶음시간 37.58분 이었다. 둥굴레 시료의 Pb 제거율은 증자시간 71.23분, 볶음온도 $119.81^{\circ}C$ 및 볶음시간 24.35분일 때 최대값 $18.87\%$이었으며, Cd 제거율은 증자시간 160.89분, 볶음온도 $126.43^{\circ}C$ 및 볶음시간 15.81분일 때 최대값 $50.85\%$로 예측되었다. 중금속 제거율을 고려한 둥굴레차의 품질특성을 극대화시킬 수 있는 증자 및 볶음조건은 증자시간 $165{\sim}180$분, 볶음온도 $120{\sim}135^{\circ}C$ 및 볶음시간 $30{\sim}45$분 범위로 예측되었다. 이상의 예측범위 내의 임의의 점에서 실제 실험한 실험치는 반응표면분석법에 의해 예측된 값과 유사한 경향을 보여 도출된 회귀식의 신뢰성을 검증할 수 있었다.

Keywords

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