Mendes LTS, Dall´Antonia LH. Ammonium ions determination with polypyrrole modified electrode. Semin., Exact Tech. Scienc. [Internet]. 2007 Jul. 15 [cited 2026 May 1];28(1):79-86. Available from: https://ojs.uel.br/revistas/uel/index.php/semexatas/article/view/1886