本文選題：油酸 + 亞油酸��； 參考：《中國食品學(xué)報(bào)》2017年10期

【摘要】：采用氣相色譜-質(zhì)譜法分析油酸和亞油酸異構(gòu)體的出峰順序和質(zhì)譜特征,結(jié)果表明:脂肪酸在強(qiáng)極性毛細(xì)管柱BPX-70(120 m×0.25 mm×0.25μm)上的出峰順序具有一定規(guī)律。油酸和亞油酸異構(gòu)體中,出峰順序依次為C_(18:1 6t)、C_(18:19t)、C_(18:1 11t)、C_(18:1 9c)、C_(18:1 11c)和C_(18:2 9t,12t)、C_(18:2 9c,12t)、C_(18:2 9t,12c)、C_(18:2 9c,12c)。根據(jù)斷裂規(guī)律和質(zhì)譜特征分析,油酸甲酯的特征離子為m/z 55(基峰離子)、222([M-74]~+)、264([M-32]~+)和296(M~+),而亞油酸甲酯的特征離子為m/z67(基峰離子)、220([M-74]~+)、263([M-31]~+)和294(M~+)。油酸和亞油酸的異構(gòu)體分別具有相同的特征離子,且質(zhì)譜圖極為相近,說明不能通過特征離子和質(zhì)譜圖判斷油酸和亞油酸異構(gòu)體中的雙鍵位置和順反構(gòu)象。
[Abstract]:The peak order and mass spectra of oleic acid and linoleic acid isomers were analyzed by gas chromatography-mass spectrometry. The results showed that the peak order of fatty acids in the strong polar capillary column BPX-70 (120 m x 0.25 mm x 0.25 mu m) had a certain regularity. The order of oleic acid and linoleic acid isomers was C_ (18:1 6T), C_ (18:19t), C_ (18:1 11T), 18 1 9C), C_ (18:1 11C) and C_ (18:2 9t, 12t), C_ (18:2 9C, 12t). The characteristic ions of methyl oleate are 55 (base peak ion), 222 (), 264, and 296, while the characteristic ions of methyl linoleate are 220 (base peak ions), 220, 263. And 294 (M~+). The isomers of oleic acid and linoleic acid have the same characteristic ions respectively, and the mass spectrogram is very close, indicating that the double bond position and the conformation of the oleic acid and linoleic acid isomers can not be judged by the characteristic ions and mass spectrograms.
【作者單位】： 寧波大學(xué)海洋學(xué)院;中國海洋大學(xué)食品科學(xué)與工程學(xué)院;中國水產(chǎn)科學(xué)研究院南海水產(chǎn)研究所農(nóng)業(yè)部水產(chǎn)品加工重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(31201283) 農(nóng)業(yè)部水產(chǎn)品加工重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(nybjg201208) 寧波市自然科學(xué)基金項(xiàng)目(2012A610136)
【分類號】：O657.63;TS221
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本文編號：1912452