ANALYSIS OF AUTOXIDIZED FATS BY GAS CHROMATOGRAPHY-MASS SPECTROMETRY .9. HOMOLYTIC VS HETEROLYTIC CLEAVAGE OF PRIMARY AND SECONDARY OXIDATION-PRODUCTS
ANALYSIS OF AUTOXIDIZED FATS BY GAS CHROMATOGRAPHY-MASS SPECTROMETRY .9. HOMOLYTIC VS HETEROLYTIC CLEAVAGE OF PRIMARY AND SECONDARY OXIDATION-PRODUCTS
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DOI：
10.1007/bf02534473
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发表时间：
1984-01-01
期刊：
影响因子：
1.9
通讯作者：
SELKE, E
中科院分区：
文献类型：
--
作者：
FRANKEL, EN;NEFF, WE;SELKE, E
为了阐明挥发性脂质氧化产物的成因，对热均解和酸异解过程进行了比较。二次氧化产物被热分解（200℃）。C)，形成的挥发物经毛细管气相色谱-质谱（GC-MS）鉴定。氧化产物在hcl -甲醇存在下也进行了分解，得到的缩醛二甲酯用GC-MS进行了鉴定。挥发性热分解产物符合均裂法预测的产物。过氧化氢基团两边都有-裂解。在热分解条件下未发现二醛。酸分解形成的缩醛是氢过氧化物基团与烯丙基双键之间选择性异裂反应所期望的缩醛。从环过氧化物和二氢过氧化物的酸分解中鉴定出的二醛包括丙二醛和2,4-己二烯二醛。
To elucidate the genesis of volatile lipid oxidation products, thermal homolytic and acid heterolytic decomposition processes were compared. Secondary oxidation products were decomposed thermally (200.degree. C), and the volatiles formed were identified by capillary gas chromatography-mass spectrometry (GC-MS). Oxidation products also were decomposed in the presence of HCl-methanol, and the resulting dimethyl acetals were identified by GC-MS. The volatile thermal decomposition products were those expected by homolytic .beta.-scission on both sides of the hydroperoxide group. No dialdehydes were identified under thermal decomposition conditions. The acetals formed by acid decomposition were those expected by selective heterolytic scission between the hydroperoxide group and the allylic double bond. Dialdehydes identified from acid decomposition of cyclic peroxides and dihydroperoxides included malonaldehyde and 2,4-hexadienedial.