NORMAL CARBONATE 38 HYDROXIDE 38 ALKALI CARBONATES 39 ACIDITY 39 TOTAL ACIDITY 40 FREE CARBON DIOXIDE 40 FREE MINERAL ACIDS 41 MINERAL ACIDS AND SULFATES OF IRON AND ALUMINIUM 41 CHLORIDE 41 IRON 43 TOTAL IRON 44 COLORIMETRIC METHOD 44 COMPARISON WITH IRON STANDARDS 45 COMPARISON WITH PERMANENT STANDARDS 46 VOLUMETRIC METHOD 46 DISSOLVED IRON 47 SUSPENDED IRON 47 FERROUS IRON 47 FERRIC IRON 48 MANGANESE 48 PERSULFATE METHOD 48 BISMUTHATE METHOD 49 LEAD, ZINC, COPPER, AND TIN 50 LEAD 51 ZINC 52 COPPER 53 TIN 54 MINERAL ANALYSIS 56 RESIDUE ON EVAPORATION 56 ALKALINITY AND ACIDITY 56 CHLORIDE 56 NITRATE NITROGEN 56 SEPARATION OF SILICA, IRON, ALUMINIUM, CALCIUM, AND MAGNESIUM 56 SILICA 56 IRON AND ALUMINIUM 57 CALCIUM 57 MAGNESIUM 57 SEPARATION OF SULFATE, SODIUM, AND POTASSIUM 58 SULFATE 58 SODIUM, POTASSIUM AND LITHIUM 58