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題 名 | 應用上部空隙自動取樣技術結合氣相層析質譜儀分析油脂揮發性氣化產物=Application of Headspace Auto-Sampling Equipped with Gas Chromatography-Mass Spectroscopy for the Analysis in Volatile Compounds of Lipid Oxidation |
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作 者 | 顏裕鴻; 陳昭雄; 楊堯凱; 陳玉舜; | 書刊名 | 弘光學報 |
卷 期 | 30 1997.10[民86.10] |
頁 次 | 頁13-28 |
分類號 | 466.11 |
關鍵詞 | 上部空隙自動取樣; 油脂氧化; 揮發性成分; Headspace auto-sampling; Lipid oxidation; Volatile compounds; |
語 文 | 中文(Chinese) |
中文摘要 | 以上部空隙自動取樣裝置結合氣相層析儀進行不同過氣化價的黃豆油與黃豆油甲酯其揮發性成分的定量分析,期能以揮發性成分判斷油脂之劣變,及瞭解立體阻礙效應對油脂氧化之影響。結果得知低過氧化價(Perolddevalue;POV)之黃豆油(POV=l.04)與黃豆油甲酯(POV=1.7)其揮發性成分甚少,遠低於POV=4.11 之黃豆油與POV=3.97之黃豆油甲酯。經氣相層析質譜儀(GC-MS)鑑定油脂自氧化之揮發性成分分別為丙酮、戊醛、2-丁酮、己醛及2,4-庚二烯醛,其中黃豆油揮發性成分隨氣化程度增加,戊醛之相對含量減少,而2,4-庚二烯醛則相對增加,黃豆油甲酯氣化過程均以2-丁酮含定量最高佔60%以上且有逐漸增加的趨勢,可作為油脂氧化程度之參考指標。由此研究亦發現黃豆油自氧化反應時,其氧化的起始階段較容易由近甲基端開始氧化,存在著立體阻礙效應。 |
英文摘要 | The volatile compounds formed in the soybean oil and its methyl esters with different autoxidative degree were analyzed by gas chromatography equipped with static headspace auto-sampler. And the justification of Hqid rancidity with the effect ofsteric hindrance were be respected. Results show the content in volatile compounds of soyybean oil (peroxide value; POV=1.04) and its methyl esters (POV=1.7) were less than soybean oil (POV=4.11) and its methyl esters (POV=3.97). The volatile compounds from autoxidized soybean oil identified by GC-MS were n-propanal, n-pentanal, 2-butanone, n-hexanal and 2.4-heptadlenal. And the content of 2.4-heptadienal increase when the pentanal decrease during autoxidation for soybean oil. For methyl esters of soybean oil, the content of 2-butanone was the largest and more than 60% and increase during oxidative stage. These results provide the index of lipid oxidation. This study again indicated that the fatty acids on the triacylglycerol molecule exhibited the steric hindrance effect during initial stage of autoxidation. |
本系統中英文摘要資訊取自各篇刊載內容。