Electrosynthesis of a new weak catex from p-nitrobenzoic acid and its application in separation and preconcentration of some organic compounds before measuring by HPLC

In this work a new weak catex was prepared by electropolymerization of p-nitrobenzoic acid under controlled potential of working electrode on Pb cathode. The electrochemical cells were separated by a thin layer of agar and electropolymerization was carried out at pH=8. After 8 hours a pale yellow polymer was precipitated and it was collected and after purification by soxhlet and water as solvent ,it was characterized by CV, FT-IR , DSC and NMR . The electrode-product was slightly soluble in water, MeOH and soluble in DMSO. The prepared polymer was coated on a suitable solid support and was used for separation of some aniline derivatives from aquatic samples before measuring by HPLC . The results of experiments show that the prepared polymer (catex) has a high tendency towards organic compounds containing nitrogen atom. In some cases the percentage of extraction is about 95 to 98 percent [1-5].