Triglyceride Composition of Walnut Oil

호도기름의 Triglyceride 조성(組成)에 관한 연구(硏究)

The present study was conducted to elucidate the triglyceride composition of walnut oil. The triglycerides were separated by thin layer chromatography (TLC) and fractionated on the basis of partition numbers by reverse phase high performance liquid chromatography (HPLC) on a column packed with $\mu$-bondapak $C_{18}$ using methanol-chloroform mixture as a solvent system. Each of these collected fractions was fractionated again on the basis of acyl carbon number of triglyceride by gas liquid chromatography (GLC). The fatty acid composition of triglycerides for each partition numbered group was also analyzed by GLC. From the results, it was found that walnut oil consists of ten kinds of triglycerides, and the patterns of major ones in walnut oil were as follows: 53.3% of $(C_{18:2},\;C_{18:2},\;C_{18:2})$, 10.1% of $(C_{18:1},\;C_{18:2},\;C_{18:2})$, 5.4% of $(C_{18:1},\;C_{18:1},\;C_{18:2})$, 4.3% of $(C_{18:1},\;C_{18:2},\;C_{18:3})$, 3.9% of $(C_{18:0},\;C_{18:2},\;C_{18:2})$, 2.0% of $(C_{18:0},\;C_{18:1},\;C_{18:2})$, 1.8% of $(C_{18:0},\;C_{18:2},\;C_{18:2})$.

호도(胡桃)기름의 triglyceride 조성(組成)을 밝히기 위하여 TLC로서, 호도(胡桃)기름의 triglyceride를 분리하고, 이것을 HPLC에 의하여 PN별(別)로 triglyceride를 분획(分劃)하였다. PN 별(別)로 분획(分劃)한 각(各) 획분(劃分)을 다시 GLC에 의하여 acyl 탄소수별(炭素數別)로 분획(分劃)하였으며, 또한 PN별(別) 각획분(各劃分)의 지방산조성(脂肪酸組成)을 GLC로 분석(分析)하였다. 이들 세가지 chromatography의 분석결과(分析結果)로 부터 호도(胡桃)기름의 triglyceride 조성(組成)을 산정(算定)하였다. 산정(算定)한 호도(胡桃)기름의 triglyceride는 10종류였으며, 이들 중 1% 이상을 차지하는 triglyceride를 들면 다음과 같다. $(C_{18:2},\;C_{18:2},\;C_{18:2};\;53.3%)$, $(C_{18:1},\;C_{18:2},\;C_{18:2};\;10.1%)$, $(C_{18:1},\;C_{18:1},\;C_{18:2};\;5.4%)$, $(C_{18:1},\;C_{18:2},\;C_{18:3};\;4.3%)$, $(C_{18:0},\;C_{18:2},\;C_{18:2};\;3.9%)$, $(C_{18:0},\;C_{18:1},\;C_{18:2};\;2.0%)$, $(C_{18:0},\;C_{18:2},\;C_{18:2};\;1.8%)$.