Sharif University of Technology Scientia Iranica 1026-3098 15 4 2008 07 01 Determination of Traces of 2,4-Dichlorophenoxy Acetic Acid in Environmental Samples 2933 EN N. Maleki Department of Chemistry,Shiraz University A. Safavi Department of Chemistry,Shiraz University Journal Article 2009 05 27 drop electrode in aqueous media and in the presence of Britton-Robinson buer as the electrolyte. In this study, the electroinactive 2,4-D was rst converted to electroactive nitrated 2,4-D. Subsequent determination was carried out by dierential pulse polarography. Under optimum conditions (pH = 11;  = 90 mV s????1; modulation amplitude = 120 mV), the relative standard deviation was 4.5% and limit of detection in terms of nitrated 2,4-D was 5 g L????1 (1:8810????8 M) with linear concentration range from 8 to 300 g L????1(310????8 ????1:1210????6M). The proposed method oered high sensitivity as well as good selectivity. A mechanistic study, showed fourelectron reduction of nitrated 2,4-D to its hydroxylamine derivative. The proposed method was, also, applied to the determination of 2,4-D in environmental samples such as soil samples. https://scientiairanica.sharif.edu/article_2933_34b897ee27c029e387d5f6057f60596b.pdf