2. Soap Analysis 137-138 Moisture 138-139 Free Alkali or Acid 139-142 Insoluble Matter 143 Starch and Gelatine 143-144 Total Fatty and Resin Acids 144 Determination of Rosin 144-147 Total Alkali 147-148 Unsaponifiable Matter 148 Silica and Silicates 148-149 Glycerine in Soap 149-150 Sugar in Soap 150 3. Glycerine Analysis 150-151 Sampling 151 Analysis 151-154 Acetin Process for the Determination of Glycerol 155-156 The Method 156-159 Ways of Calculating Actual Glycerol Contents 159-160 Bichromate Process for Glycerol Determination Reagents Required 160-161 The Method 161-162 Sampling Crude Glycerine 162-164 CHAPTER VII STANDARD METHODS FOR THE SAMPLING AND ANALYSIS OF COMMERCIAL FATS AND OILS 165-195 1. Scope, Applicability and Limitations of the Methods 165-166 Scope 165 Applicability 166 Limitations 166 Sampling 166-169 Tank Cars 166-167 Barrels, Tierces, Casks, Drums, and Other Packages 168 2. Analysis 169-183 Sample 169 Moisture and Volatile Matter 170-172 Insoluble Impurities 172-173 Soluble Mineral Matter 173 Free Fatty Acids 174 Titer 174-175 Unsaponifiable Matter 176-177 Iodine Number-Wijs Method 177-181 Saponification Number (Koettstorfer Number) 181 Melting Point 181-182 Cloud Test 182-184