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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Organic Acids, Free Sugars, and Volatile Flavor Compounds by Type of Jerusalem Artichoke

돼지감자의 품종별 유기산, 유리당 및 휘발성 향기성분

  • Jung, Bok-Mi (Division of Food and Nutrition, Chonnam National University / Human Ecology Research Institute) ;
  • Shin, Tai-Sun (Division of Food and Nutrition, Chonnam National University / Human Ecology Research Institute)
  • 정복미 (전남대학교 식품영양과학부/ 생활과학연구소) ;
  • 신태선 (전남대학교 식품영양과학부/ 생활과학연구소)
  • Received : 2017.04.18
  • Accepted : 2017.06.19
  • Published : 2017.07.31
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Abstract

This study analyzed contents of organic acids, free sugars, and volatile flavor compounds by type of Jerusalem artichoke (Helianthus tuberosus L.). Organic acids in dried Jerusalem artichoke were mainly composed of malic acid, citric acid, and succinic acid. Sucrose, fructose, and glucose were the major sugar components of dried Jerusalem artichoke. Free sugars were more abundant in the white colored sample than in the purple colored sample. In contrast, purple colored sample contained more organic acids than the white colored one. Volatile compounds in Jerusalem artichoke were investigated using the solid-phase micro-extraction method of gas chromatography/mass spectrometry. A total of 117 volatile compounds were identified in Jerusalem artichoke, and chemical classification was as follows: 5 acids, 13 alcohols, 19 aldehydes, 12 hydrocarbons, 15 ketones, 8 miscellaneous, 27 pyrazines, and 18 terpenes in all samples. Terpene was the most abundant in Jerusalem artichoke, and ${\beta}$-bisabolene was the main component in terpenes. The second most common compound was aldehyde, and hexanal was the highest. Pyrazines were the most abundant in the roasted samples, and 2,5-dimethyl-3-ethylpyrazine was present at the highest level, followed by 2,5-dimethylpyrazine. Compared with purple samples, main compounds contained in white samples were aldehydes and hydrocarbons, whereas the major compounds in purple samples were terpenes and alcohols.

돼지감자의 품종별 유기산, 유리당 함량 및 휘발성 향기성분을 측정한 결과는 다음과 같다. 돼지감자에 함유된 유기산은 citric acid, malic acid, succinic acid였으며, malic acid의 함량이 가장 높았고 다음으로 citric acid로 나타났다. 총유기산 함량은 흰색이 2,065 mg/100 g, 자색은 2,482 mg/100 g으로 자색 돼지감자의 함량이 유의적으로(P<0.05) 높았다. 유리당은 sucrose, fructose, glucose로 나타났으며, sucrose의 함량이 가장 높았고 총유리당 함량은 흰색이 24.95 g/100 g, 자색이 11.57 g/100 g으로 나타나 흰색 돼지감자의 총유리당 함량이 유의적으로(P<0.05) 높게 나타났다. 휘발성 향기성분에서 돼지감자는 품종별, 처리방법과는 관계없이 acid류 5종, alcohol류 13종, aldehyde류 19종, hydrocarbon류 12종, ketone류 15종, 기타 8종, pyrazine류는 27종, terpene류는 18종이었으며, 총 117개의 휘발성 성분이 확인되었다. 돼지감자에는 terpene류가 가장 많았으며, terpene류 중에서는 ${\beta}$-bisabolene이 주된 성분이었다. 두 번째로 많은 화합물은 aldehyde류였으며, hexanal이 가장 높게 나타났다. 처리방법에 따른 차이로 볶은 시료에서는 pyrazine류가 대부분을 차지하였으며, 2,5-dimethyl-3-ethylpyrazine이 가장 높았고 다음으로 2,5-dimethylpyrazine으로 나타났다. 자색시료보다 흰색시료에 함량이 높은 화합물은 aldehyde류, hydrocarbone류였으며, 흰색시료보다 자색시료에 많은 화합물은 terpene류와 alcohol류로 나타났다.

Keywords

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