Encara no tenim significats per a "remove by filtration".
1If a residue remains which is sufficiently colored to obscure the end-reaction of the permanganate, it must be removed by filtration.
2If the residue is white, or known to be free from iron, it may be neglected and need not be removed by filtration.
3The residual amounts of the Total Organic Solids (TOS) in glucose syrups are removed by filtration and purification during starch processing.