Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

Testing and statistical evaluation of six operating systems suitable for the isotachophoretic determination of NO₃^-, SO₄^2-, NO₂^- and H₂PO₄^-, with the aim of the determination of the mentioned anions in plant material, are described. The proposed sample pretreatment reflecting the effort to minimize the number of unavoidable steps consisted only of extraction and filtration. The attention was paid to quantitative aspects of the extraction and to the possibility of extracts contamination during filtration. Influence of the sample amount on the anion zone lengths and the reproducibility of the determination were investigated too.