비발효 매실주의 제조조건을 설정하기 위하여 매실의 성숙중 주요성분을 분석하였는 바, 매실의 중량은 6월 22일 전후에 $18.3{pm}2.57;g$. 수분은 평균$92.1{pm}0.27%$이었다. 호흡량은 6월22일경에 climacteric maximum에 도달하였으며, 이때 pH는 성숙함에 따라 $2.76{pm}0.025$에서 $2.51{pm}0.081$로 낮아졌고, 적정산도는 $1.15{pm}0.083%$에서 점차 증가하였다. 무기물의 함량은 Fe가 가장 많았으며, 다음으로 Zn, Mg, Cu 및 Ca순이었고, 무기물의 함량비는 매실이 성숙함에 따라 감소하는 경향을 나타내었다. 총당은 4월 27일 경에 $1.12{pm}0.032%$이던 것이 6월 8일 경에 $1.74{pm}0.090%$까지 증가하였고, 환원당도 이와 비슷한 경향으로 증가하였다. 유기산은 malic acid와 citric acid의 함량이 많았으며, 매실이 성숙함에 따라 malic acid의 함량은 급격히 감소하였고, citric acid의 함량은 증가하였다.
In order to determine optimal conditions for the preparation of Japanese apricot wine, the changes in major components were experimented during ripening. A weight was $18.3{pm}2.57;g$ at June 22 or so. Moisture was reached $92.1{pm}0.17;%$ at that time. Respiration amounts were decreased by degrees during the ripening of Japanese apricot but came near climacteric maximum state about June 22. pH was decreased from $2.76{pm}0.025$ to $2.51{pm}0.081$, titratible acidity was increased from $1.15%{pm}0.083%$ to $1.39{pm}0.061%$. Fe was detected most of all and Zn, Mg, Cu and Ca were checked by the next order in mineral contents. And the rate of mineral contents was decreasing phenomenon slightly with ripening. Total sugar, about June 8, was higher than any other time with $1.74{pm}0.090%$ and reducing sugar was increased with similarly a tendency of total sugar. Malic and citric acid were much of organic acids. The content of malic acid was decreased greatly but ctric acid was increased during ripening.
