... Abstract It was propoused to use polyurethane foam (PUF) as solid polymer reagent for determination of nitrite. The determination is based on the diazotization of terminal toluidine groups of PUF with nitrite in acid solution, followed by azo coupling reactions of polymer cation with compounds such as 1- naphtylamine, 2,3-diaminonaphtaline, rivanole, 8-oxyguinoline, 1- and 2-naphtols. ... Moscow University Chemistry Bulletin . 2004, Vol. ... 2, P. 131 . ... Moscow State University, 2002 . ...