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Comparison of physicochemical and microorganism characteristics between the air-dried and sun-dried red pepper in south Korea

열풍 건조와 태양 건조한 국내산 고추의 물리화학적 및 미생물학적 품질 특성 비교

  • Ku, Kyung Hyung (Distribution System Research Group, Korea Food Research Institute) ;
  • Lee, Kyung-A (Distribution System Research Group, Korea Food Research Institute) ;
  • Koo, Minseon (Food Safty Research Group, Korea Food Research Institute)
  • 구경형 (한국식품연구원 유통시스템연구단) ;
  • 이경아 (한국식품연구원 유통시스템연구단) ;
  • 구민선 (한국식품연구원 안전시스템연구단)
  • Received : 2014.04.24
  • Accepted : 2014.06.09
  • Published : 2014.08.30

Abstract

The aim of this study was to provide useful information for making guide of quality index of Korean red pepper. The results of physicochemical characteristics analysis showed the moisture content of air-dried and sun-dried red pepper were 10.38~15.60% and 9.46~17.22%, which show that 50% of the 40 samples exceeded the 13% KS moisture standards of red pepper powder. The capsaicinoids content of the air-dried and sun-dried samples were 10.85~126.39 mg% (1,627~18,958 Scoville heat unit) and 0.43~164.09 mg% (64.5~24,613.5 Scoville heat unit). A wide distribution of ASTA values was observed: 49.12~154.69 and 70.08~182.13 for air-dried and sun-dried red pepper, respectively, with 9.29~23.10% free sugar, and 0~1,050 mg% of ascorbic acid. The total viable cells of the air-dried red peppers were 2.01~6.67 log CFU/g and of sun-dried red peppers, 1.74~5.77 log CFU/g. The contamination level of yeast in the samples were 1.03~4.12 log CFU/g of the air-dried samples and 1.05~6.10 log CFU/g of the sun-dried samples. Among the foodborne pathogens, Clostridium perfringens and Bacillus cereus were detected in many red pepper samples regardless drying method. In the principal component analysis, the first (PC1) and second principal components (PC2) accounted for 56.78 % of the total variances (38.47% and 18.31%, respectively). Ascorbic acid, ASTA, color value (L, a, b) were strongly correlated with the PC1, and quality characteristics such as moisture, microorganism, sample (drying method) showed a negative correlation with the PC1.

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