3.3. Comparison between UHPLC analysis and MBA
The MBA results of the P. freudenreichii cells were similar to the UHPLC derived results, whereas analysis of the certified reference pig liver (BCR 487) resulted in a 17% higher vitamin B12 content by the MBA (Table 2). The vitamin B12 contents determined by the UHPLC were 67% and 63% of the MBA results for the fermented