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Food Chem. 2017 Feb 1;216:301-8. doi: 10.1016/j.foodchem.2016.08.037. Epub 2016 Aug 16.

Isolation and analysis of vitamin B12 from plant samples.

Author information

  • 1Institute of Technical Chemistry, Gottfried Wilhelm Leibniz University Hanover, Callinstrasse 5, 30167 Hanover, Germany. Electronic address: michailnak@hotmail.com.
  • 2Institute of Technical Chemistry, Gottfried Wilhelm Leibniz University Hanover, Callinstrasse 5, 30167 Hanover, Germany. Electronic address: pepelanova@iftc.uni-hannover.de.
  • 3Institute of Technical Chemistry, Gottfried Wilhelm Leibniz University Hanover, Callinstrasse 5, 30167 Hanover, Germany. Electronic address: beutel@iftc.uni-hannover.de.
  • 4Institute of Food Chemistry, Gottfried Wilhelm Leibniz University Hanover, Callinstrasse 5, 30167 Hanover, Germany. Electronic address: krings@lci.uni-hannover.de.
  • 5Institute of Food Chemistry, Gottfried Wilhelm Leibniz University Hanover, Callinstrasse 5, 30167 Hanover, Germany. Electronic address: rg.berger@lci.uni-hannover.de.
  • 6Institute of Technical Chemistry, Gottfried Wilhelm Leibniz University Hanover, Callinstrasse 5, 30167 Hanover, Germany. Electronic address: scheper@iftc.uni-hannover.de.

Abstract

Based on increased demands of strict vegetarians, an investigation of vitamin B12 content in plant sources, was carried out. The vitamin B12 concentration was determined by RP-HPLC with UV detection, after prior matrix isolation by immunoaffinity chromatography (IAC). Vitamin B12 was extracted in the presence of sodium cyanide, to transform all forms of cobalamin into cyanocobalamin. Diode array detector was used to monitor vitamin B12, after its chromatographic separation under gradient elution with a mobile phase consisting of acetonitrile and trifluoroacetic acid 0.025% (w/v). The method demonstrated excellent linearity with a limit of detection 0.004μg/ml. The method precision was evaluated for plant samples and it was below 0.7% (n=6). Significant amounts of vitamin B12 in plants were detected in Hippophae rhamnoides (37μg/100g dry weight), in Elymus (26μg/100g dry weight) and in Inula helenium (11μg/100g dry weight).

KEYWORDS:

Frankia alni; HPLC-MS/MS; HPLC-UV; Hippophae rhamnoides; Immunoaffinity chromatography (IAC); Plant-based foods; Vitamin B(12) (cobalamin)

PMID:
27596424
DOI:
10.1016/j.foodchem.2016.08.037
[PubMed - indexed for MEDLINE]
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