Degradation of folic acid in fortified vitamin juices during long term storage

Lara Frommherz; Yvonne Martiniak; Thorsten Heuer; Alexander Roth; Sabine E Kulling; Ingrid Hoffmann

doi:10.1016/j.foodchem.2014.02.156

Degradation of folic acid in fortified vitamin juices during long term storage

Food Chem. 2014 Sep 15:159:122-7. doi: 10.1016/j.foodchem.2014.02.156. Epub 2014 Mar 12.

Authors

Lara Frommherz¹, Yvonne Martiniak², Thorsten Heuer³, Alexander Roth⁴, Sabine E Kulling⁵, Ingrid Hoffmann⁶

Affiliations

¹ Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Safety and Quality of Fruit and Vegetables, Haid-und-Neu-Straße 9, 76131 Karlsruhe, Germany. Electronic address: lara.frommherz@mri.bund.de.
² Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Nutritional Behaviour, Haid-und-Neu-Straße 9, 76131 Karlsruhe, Germany. Electronic address: yvonne.martiniak@mri.bund.de.
³ Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Nutritional Behaviour, Haid-und-Neu-Straße 9, 76131 Karlsruhe, Germany. Electronic address: thorsten.heuer@mri.bund.de.
⁴ Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Physiology and Biochemistry of Nutrition, Haid-und-Neu-Straße 9, 76131 Karlsruhe, Germany. Electronic address: alexander.roth@mri.bund.de.
⁵ Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Safety and Quality of Fruit and Vegetables, Haid-und-Neu-Straße 9, 76131 Karlsruhe, Germany. Electronic address: sabine.kulling@mri.bund.de.
⁶ Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Nutritional Behaviour, Haid-und-Neu-Straße 9, 76131 Karlsruhe, Germany. Electronic address: ingrid.hoffmann@mri.bund.de.

PMID: 24767034
DOI: 10.1016/j.foodchem.2014.02.156

Abstract

Folic acid (FA) concentrations of nine fortified vitamin juices were determined with the aim to study the FA degradation and to investigate the deviation from the declared label value. The juices were received shortly after bottling and were analyzed monthly during controlled storage conditions (light and dark) over one year. The analyses were performed by HPLC-MS/MS, which included a fast "dilute and shoot" sample preparation. Average decreases in FA concentration of 46% were observed after one year. Fresh juices (shortly after bottling) showed the highest deviations from the declared label value (up to+89%). Label values did not reflect the actual concentration of FA in these products, making it difficult to determine the intake of this vitamin.

Keywords: Folic acid; Fortified vitamin juices; HPLC-MS/MS.

MeSH terms

Chromatography, High Pressure Liquid
Folic Acid / analysis
Folic Acid / chemistry*
Food Storage*
Food, Fortified / analysis*
Tandem Mass Spectrometry
Vitamins / chemistry*

Substances

Vitamins
Folic Acid