Polymer retention levels—units

Irrespective of the particular mechanisms of polymer retention, the main quantity of interest is how much polymer is retained. However, this may 

Frequently, in flow through porous media, retention is quoted in mass of polymer per unit volume of rock or sand pack, F. The most common field unit for this is Ib/acre-foot (Ib/AF). To convert from F to F , the density of the formation must be known. For example if the adsorption level is r = x /tg/g, then this is given in Ib/AF as  

These are simple relationships, but care should be taken when using results from the literature, especially in establishing whether the density Pr or Prg is being quoted. 

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Furthermore, the crystallographic correlation between the starting substance and the final product has been demonstrated in a chemical reaction on DSP - poly-DSP for the first time (M monomer and polymer crystals are closely related on the level of unit cell dimensions, with a retention of the crystal symmetry during the reaction. 

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