ISI 04-1e Determination of Dry Matter in Starch Syrup in Vacuum Oven at 70 oC
ISI 04-1e Determination of Dry Matter in Starch Syrup in Vacuum Oven at 70 o C 1. Scope The method is applicable to starch hydrolysates, syrups and dextrose mother liquor. LT 15. Dec. 1964 Rev. LT 21. Nov. 1997 2. Principle The starch sample is dried in vacuum at 70 o 3. Reagent 3.1 Kieselguhr, acid washed and dried. Wash kieselguhr on a Büchner funnel with water acidified with 1 ml concentrated hydrochloric acid per l until washings turns acid (litmus). Rinse with water until chloride can no longer be detected with silver nitrate, AgNO 3 . Dry over night at 105 o C. Store in tight container. 4. Apparatus 4.1 Analytical balance weighing to the nearest 1 mg. 4.2 Dish of aluminium or glass with tight-fitting lid 4.3 Electrically heated vacuum oven. 4.4 Desiccator with dry drying agent 4.5 Small stirring rod of glass 4.6 Glass beaker 100 ml 4.7 Weighing pipette, Quickfit 5. Procedure Fill 30 g kieselguhr (3.1) into dish (4.2). Dry dish, kie