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Light-induced oxidation and isomerization of all-trans-beta-cryptoxanthin in a model system

文献类型: 外文期刊

作者: Li, Dajing 1 ; Xiao, Yadong 1 ; Zhang, Zhongyuan 1 ; Liu, Chunquan 1 ;

作者机构: 1.Jiangsu Acad Agr Sci, Inst Farm Prod Proc, Nanjing 210014, Jiangsu, Peoples R China

2.Nanjing Agr Univ, Coll Food Sci & Technol, Nanjing 210095, Jiangsu, Peoples R China

3.Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China

期刊名称:JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY ( 影响因子:6.252; 五年影响因子:5.375 )

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收录情况: SCI

摘要: The oxidation and isomerization of all-trans-p-cryptoxanthin as affected by iodine-catalysed illumination and non-iodine-catalysed illumination were studied. Seven cis-isomers and two oxidation products were separated by HPLC method using a C-30 column. The identification and structural elucidation of the compounds were determined by HPLC-DAD-APCI-MS. Five compounds were identified in details for the first time, namely, beta-beta-carotene-3-one, 5,6-epoxy-beta-beta-carotene-3-one, 13,15-di-cis-, 9,13-di-cis- and 9,9'-di-cis-beta-ciyptoxanthin. Sum of 13- and 13'-cis-beta-cryptoxanthin was the major cis-isomer of beta-cryptoxanthin formed, accounting for 59.0% and 30.6%, respectively. The formation of di-cis isomers may prefer in the present of iodine. 13,15-di-cis-beta-cryptoxanthin was the major di-cis-isomer of the iodine-catalysed photo-isomerization. (C) 2014 Elsevier B.V. All rights reserved.

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