Hi All, I am trying to figure out the most efficient method for testing plant available phosphorus. Much of the literature suggests using an anion-exchange membrane made by BDH (Prod. # 551642S). This product, however, has been discontinued. Does anyone know if another company is now making the product or another alternative that I can use? I know that I can use resin beads, but I did not know if this was my only option since the BDH anion-exchange membrane is out of production.
Billy
