포도에서 과분은 육안으로 보았을 때 포도 과피 위에 하얀 가루로 덮혀 있는 듯한 외관을 보여, 농약, 효모, 또는 당 등으로 오인되고 있다. 이러한 과분의 구성성분을 알아보고자 흑포도 ‘캠벨얼리’와 ‘거봉’, 적포도 ‘홍이슬’, 그리고 백포도 ‘청수’를 이용하여 GC-MS(Gas Chromatography Mass Spectrometry)로 정성분석을 실시한 결과, 모든 품종에서 지방족 화합물인 알칸류와 알켄류, 제1알콜류, 알데히드류, 에스테르류, 지방산류 등이 검출되었으며, 적포도 품종은 알칸류와 에스테르류가 흑포도와 백포도 품종에서는 알칸류가 주 성분인 것으로 조사되었다. 또한 각 품종별 과분의 양은 ‘청수’(943.07㎍ㆍ㎝⁻²) > ‘캠벨얼리’(636.78㎍ㆍ㎝⁻²) > ‘홍이슬’(605.30㎍ㆍ㎝⁻²) > ‘거봉’(147.62㎍ㆍ㎝⁻²) 순으로 과분이 많이 형성되었다. 수확기의 포도 과립을 주사전자현미경을 이용하여 과분의 미세구조를 관찰한 결과 ‘캠벨얼리’와 ‘거봉’, ‘홍이슬’, ‘청수’ 모두 일정한 방향성이 없는 platelet을 가지고 있었으며, 특히, ‘거봉’과 ‘청수’는 기본 platelet에 긴 선형의 형태가 같이 공존하는 것으로 관찰되었다.
포도에서 과분은 육안으로 보았을 때 포도 과피 위에 하얀 가루로 덮혀 있는 듯한 외관을 보여, 농약, 효모, 또는 당 등으로 오인되고 있다. 이러한 과분의 구성성분을 알아보고자 흑포도 ‘캠벨얼리’와 ‘거봉’, 적포도 ‘홍이슬’, 그리고 백포도 ‘청수’를 이용하여 GC-MS(Gas Chromatography Mass Spectrometry)로 정성분석을 실시한 결과, 모든 품종에서 지방족 화합물인 알칸류와 알켄류, 제1알콜류, 알데히드류, 에스테르류, 지방산류 등이 검출되었으며, 적포도 품종은 알칸류와 에스테르류가 흑포도와 백포도 품종에서는 알칸류가 주 성분인 것으로 조사되었다. 또한 각 품종별 과분의 양은 ‘청수’(943.07㎍ㆍ㎝⁻²) > ‘캠벨얼리’(636.78㎍ㆍ㎝⁻²) > ‘홍이슬’(605.30㎍ㆍ㎝⁻²) > ‘거봉’(147.62㎍ㆍ㎝⁻²) 순으로 과분이 많이 형성되었다. 수확기의 포도 과립을 주사전자현미경을 이용하여 과분의 미세구조를 관찰한 결과 ‘캠벨얼리’와 ‘거봉’, ‘홍이슬’, ‘청수’ 모두 일정한 방향성이 없는 platelet을 가지고 있었으며, 특히, ‘거봉’과 ‘청수’는 기본 platelet에 긴 선형의 형태가 같이 공존하는 것으로 관찰되었다.
The epicuticular wax appears to cover the skin of grapes as white powder, so it’s often misunderstood as agricultural chemicals, yeast, or sugar. In order to find the components of this kind of fruit powder, a qualitative analysis was conducted through GC-MS (Gas Chromatography Mass Spectrometry) on...
The epicuticular wax appears to cover the skin of grapes as white powder, so it’s often misunderstood as agricultural chemicals, yeast, or sugar. In order to find the components of this kind of fruit powder, a qualitative analysis was conducted through GC-MS (Gas Chromatography Mass Spectrometry) on ‘Campbell Early’, ‘Kyoho’, ‘Hongisul’, and ‘Cheongsoo’. As the results, the aliphatic compounds of alkanes, primary alcohols, aldehydes, esters, and fatty acid were detected from all four species. It was also found that the main components of red grape species were alkanes and ester, whereas the main component of white grape species was alkanes. In addition, the inspection result for the quantity of epicuticular wax in each species showed that the highest was ‘Cheongsoo’(943.07 ㎍ㆍ㎝⁻²), followed by ‘Campbell Early’(636.78 ㎍ㆍ㎝⁻²), ‘Hongisul’ (605.30 ㎍ㆍ㎝⁻²), and ‘Kyoho’(147.62 ㎍ㆍ㎝⁻²). In order to examine the ultrastructure of fruit epicuticular wax, the grape berries of the harvesting seasons was observed through a scanning electron microscope, and it was found that all four species of grapes, ‘Campbell Early’, ‘Kyoho’, ‘Hongisul’, and ‘Cheongsoo’, had platelets with no regular direction, and in particular, ‘Kyoho’ and ‘Cheongsoo’ were examined to have both basic and long line-shaped platelets.
The epicuticular wax appears to cover the skin of grapes as white powder, so it’s often misunderstood as agricultural chemicals, yeast, or sugar. In order to find the components of this kind of fruit powder, a qualitative analysis was conducted through GC-MS (Gas Chromatography Mass Spectrometry) on ‘Campbell Early’, ‘Kyoho’, ‘Hongisul’, and ‘Cheongsoo’. As the results, the aliphatic compounds of alkanes, primary alcohols, aldehydes, esters, and fatty acid were detected from all four species. It was also found that the main components of red grape species were alkanes and ester, whereas the main component of white grape species was alkanes. In addition, the inspection result for the quantity of epicuticular wax in each species showed that the highest was ‘Cheongsoo’(943.07 ㎍ㆍ㎝⁻²), followed by ‘Campbell Early’(636.78 ㎍ㆍ㎝⁻²), ‘Hongisul’ (605.30 ㎍ㆍ㎝⁻²), and ‘Kyoho’(147.62 ㎍ㆍ㎝⁻²). In order to examine the ultrastructure of fruit epicuticular wax, the grape berries of the harvesting seasons was observed through a scanning electron microscope, and it was found that all four species of grapes, ‘Campbell Early’, ‘Kyoho’, ‘Hongisul’, and ‘Cheongsoo’, had platelets with no regular direction, and in particular, ‘Kyoho’ and ‘Cheongsoo’ were examined to have both basic and long line-shaped platelets.
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