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손미령,조래광 ( Mi Ryeong Sohn,Rae Kwang Cho ) 한국응용생명화학회 1998 Applied Biological Chemistry (Appl Biol Chem) Vol.41 No.3
In non-destructive evaluation of free acid content in apples by near- infrared spectroscopy(NIRS), browning and heat treatment of squeezed apple juice affected to the accuracy but titrable alkali concentration did not. The free acid content in apples after harvest was able to determine using different apples in harvest time for calibration making. The result of MLR multiple correlation coefficient(R) was 0.77 and standard error of prediction(SEP) was 0.03%. The free acid content in apples during storage was able to determine using calibration equation established with stored apples, R was 0.90 and SEP was ca. 0.04%. The prediction accuracy by LAIR was not sufficient for use of quantitative analysis of free acid content in apple, but classification of law and high level in acid content was supposed to be applicable.
손미령,조래광,Sohn, Mi-Ryeong,Cho, Rae-Kwang 한국응용생명화학회 1998 Applied Biological Chemistry (Appl Biol Chem) Vol.33 No.2
근적외 분광분석법으로 사과의 유리산 함량을 비파괴적으로 측정함에 있어서 사과 착즙액의 갈변에 의한 영향은 있었으나 실활처리 및 적정 알칼리액 농도는 측정 정확도에 영향을 주지 않았다. 수확기 사과의 유리산 함량은 수확 시기를 달리한 시료로 작성한 검량식을 사용하여 측정하였는데 중회귀분석 결과, 중상관계수(R)는 0.77이었고 측정오차(SEP)는 0.03%이었다. 저장 중인 사과의 유리산 함량은 저장하여 유리산 함량폭이 넓은 시료로 작성한 검량식을 사용하여 측정하였으며 그 결과 R은 0.90, SEP는 약 0.04%이었다. 근적외 분광분석법을 응용하여 사과 중의 유리산 함량을 정확히 정량하기는 다소 미흡하나 높은 산 함량치와 낮은 산 함량치를 가지는 사과로 분류하는 것은 가능한 것으로 판단되었다. In non-destructive evaluation of free acid content in apples by near- infrared spectroscopy(NIRS), browning and heat treatment of squeezed apple juice affected to the accuracy but titrable alkali concentration did not. The free acid content in apples after harvest was able to determine using different apples in harvest time for calibration making. The result of MLR, multiple correlation coefficient(R) was 0.77 and standard error of prediction(SEP) was 0.03%. The free acid content in apples during storage was able to determine using calibration equation established with stored apples, R was 0.90 and SEP was ca. 0.04%. The prediction accuracy by LAIR was not sufficient for use of quantitative analysis of free acid content in apple, but classification of law and high level in acid content was supposed to be applicable.
근적외 분광분석법을 응용한 사과의 비파괴 품질 측정 가능성 조사
조래광,손미령,권영길,이경희,박우철 ( Rae Kwang Cho,Mi Ryeong Sohn,Young Kil Kwon,Kyung Hee Lee,Woo Churl Park ) 한국응용생명화학회 1998 Applied Biological Chemistry (Appl Biol Chem) Vol.41 No.2
A possibility of evaluation of the major internal quality factors-Brix, moisture contents, firmness and acid content in the Korean domestic `Fuji` apple fruits by near-infrared reflectance spectroscopic (NIRS) methods were investigated. A multiple linear regression(MLR) analysis between the data obtained by physico- chemical analysis method using refractometer, freeze drier, texture analyzer and titrater and NIR spectral data was carried out to make a calibration. The standard error of prediction(SEP) of Brix, moisture, firmness and acid content were 0.50°Brix, 0.64%, 0.14 ㎏/㎠ and 0.07%. It is concluded that NIRS methods can be used to evaluate Brix and moisture contents of in a apple non-destructive and rapid way but the accuracy for determination of firmness and acid content was slightly low.