Comparison of high-performance ion chromatography and absorptiometric methods for the determination of phytic acid in food samples

Abstract

The objective of this paper consists in defining the interest of a new high-performance ion chromatography method (HPIC) with a chemically suppressed conductivity detector for phytic acid determination in food samples. Firstly, accuracy and precision of the HPIC method were measured. Secondly, the HPIC method and a classical absorptiometric method were compared. The HPIC method was more sensitive and selective than the absorptiometric method which led to a 27% overestimation of the phytic acid content in legume seeds. Because it is rapid and easy to perform, the HPIC method appears to be particularly suitable for routine analysis of food samples. (Résumé d'auteur