Rodrigues, M.A.Arrobas, Margarida2011-01-062011-01-062010Rodrigues, M.A.; Arrobas, Margarida (2010). Optimizing the time of incubation of an anion exchange membrane inserted into the soil to use in studies of monitoring soil nitrate levels. In AGRO2010 the XIth ESA Congress, Montpellierhttp://hdl.handle.net/10198/3015Ann anion exchange membrane (AEM) is a solid organic polymer that has a positive electrostatic charge, which is saturated by the addition of a counter ion, such as bicarbonate (HCO3), before use. In the presence of an anion, such as NO3 HCO3 will be exchanged for a stoichiometrically equivalent amount of that anion.engconference object