25th International Symposium on Analytical and Environmental Problems 252 CHARACTERIZATION OF RECYCLED RESINS WITH AMINOPHOSPHONIC GROUPS FOR A FUTURE ANTIMICROBIAL TEST Ileana Nichita 1* , Lavinia Lupa 2 , Adriana Popa 3 , Valentin Radu Gros 1 1 “Banat” University of Agricultural Science and Veterinary Medicine, 119 Calea Aradului, 30465 Timisoara, Romania 2 Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, 6 Vasile Parvan Blv, 300223 Timisoara, Romania 3 Institute of Chemistry “Coriolan Dragulescu”, 24 Mihai Viteazul Blv, 300223 Timisoara, Romania *e-mail: nichita_ileana@yahoo.com, e-mail: apopa_ro@yahoo.com Abstract This article describes analysis of resins with functional group (by type aminophosphonic groups) recuperated from a biological environment for the use in a new study of antimicrobial test. Their stability was confirmed by Fourier transform infrared spectroscopy, energy- dispersive X-ray analysis and scanning electron microscopy. Introduction Bacteria show a significant role in our life. They are dispersed in soil, air and water. They may cause numerous health related problems. For prevent the infection of bacteria some materials were employed as antimicrobial agents. One of the remarkable substances is aminophosphonic acid. It has an important role in biological system [1]. The compounds of aminophosphonic acid can be use as enzyme inhibitors, potential antibiotics and pharmacological agents [1]. In the past decade, the field of macromolecular systems with antimicrobial properties has intensive development including the chemical modification of known polymers with bioactive groups by polymer-analogous reactions [2-5]. This study concerns the characterization of recycled resins with aminophosphonic groups (see figure 1) [6] for using in a new antimicrobial test. The efficacy of the aminophosphonic pendant groups grafted on styrene-6.7%divinylbenzene copolymers was investigated by Fourier transform infrared spectroscopy, energy-dispersive X-ray analysis and scanning electron. Where: R= -C 6 H 5 (1Ba-Bz), -C 2 H 6 (2Ba-Pr); P- styrene-6.7%divinylbenzene copolymers Figure 1. Aminophosphonic pendant groups grafted on styrene-6.7%divinylbenzene copolymers P NH-CH-P(O)(OH) 2 R