Thermal decomposition of vitamin C: An evolved gas analysis-ion attachment mass spectrometry study
Thermal decomposition of vitamin C: An evolved gas analysis-ion attachment mass spectrometry study
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DOI：
10.1016/j.foodchem.2011.04.056
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发表时间：
2011-11-15
期刊：
影响因子：
8.8
通讯作者：
Fujii, Toshihiro
中科院分区：
文献类型：
--
作者：
Juhasz, Marta;Kitahara, Yuki;Fujii, Toshihiro
利用演化气体分析离子附着质谱法（EGA-IAMS）研究了维生素C的实时非等温分解。在本研究之前，在维生素C的固相降解中无法检测到脱氢- l-抗坏血酸作为分解产物被观察到。虽然它是一种重要的化合物，因为它具有一些生物活性，但由于它的化学不稳定性，很难测量。在本研究中，我们使用EGA-IAMS从维生素C的热降解中检测出脱氢l -抗坏血酸。我们从维生素C的热分解中获得的EGA-IAMS结果与之前使用热解-气相色谱-质谱（Pyr-GC-MS）的研究进行了比较。两种技术（EGA-IAMS和Pyr-GC-MS）所观察到的热解产物的定量和定性差异部分是由于产物出热解室的运输时间不同。(C) 2011 Elsevier Ltd.版权所有。
Evolved gas analysis ion attachment mass spectrometry (EGA-IAMS) was utilised to study the real-time non-isothermal decomposition of vitamin C. Dehydro-L-ascorbic acid, which has until this study been undetectable from the solid phase degradation of vitamin C, was observed as a decomposition product. While it is an important compound because it possesses some biological activity, dehydro-L-ascorbic acid is difficult to measure due to its chemical instability. In the present study using EGA-IAMS, we were able to detect dehydro-L-ascorbic acid from the thermal degradation of vitamin C. Our EGA-IAMS results obtained from the thermal decomposition of vitamin C were compared with a previous study employing pyrolysis-gas chromatography-mass spectrometry (Pyr-GC-MS). The observed quantitative and qualitative differences of the pyrolysis products obtained by the two techniques (EGA-IAMS vs. Pyr-GC-MS) are in part due to the difference in transportation time of the products out of the pyrolysis chamber. (C) 2011 Elsevier Ltd. All rights reserved.