2853.     ---------------.  [ROELEN, O.]  [Determination of Iron in Catalysts.]  FIAT Reel K-29, 1939, frames 6,930-6,931; PB 70,218; TOM Reel 296.

                    For the determination of Fe in catalysts a 10% acetic acid is recommended as solvent.  The determination is based on active Fe and not on the total Fe content.