维生素B12的光解研究及发酵液中维生素B12检测新方法的建立

采用HPLC检测法研究5，脱氧腺苷钴胺素和甲基基钴胺素的水溶液在不同光源及不同照度下的光解情况，结果表明随着光能量的增加光解速度加快。利用脱氧腺苷钴胺素的光解性质，探索了一种检测发酵液中维生素B12含量的新方法。将含有钴胺素的细胞破碎液完全光解后，测定光解后的产物羟基钴胺素，以此来确定维生素B12产量。此方法简便快速、重复性好，可应用于发酵生产维生素B12的各个环节。

Study on photolysis of Vitamin B12 and New Method to Determine the Contents of Vitamin B12 in Fermentation Broth

The photolytic behavior of deoxyadenosylcobalamin and methylcobalamin in water solution was investigated with high performance liquid chromatography. The results indicated that the photolytic cleavage rate increased with the light intensity, according to which a new method was developed to determine the concentration of vitamin B12 in fermentation broth. The samples were completely photolyzed after cell disruption. The content of vitamin B12 was obtained by determining the content of the hydroxycobalamin. The method shows many advantages, such as rapidness, high accuracy and low sample quantity needed, over traditions methods. The developed method may be used in the field of vitamin B12 fermentation.