ISI 01-1e Determination of Dry Matter in Starch by Oven Drying at 130 oC
Return 1. Scope The method is applicable to starch in native or modified form. LT 15 Dec. 1964 Rev.: LT 21 Nov. 1997 2. Principle The sample is dried to constant weight. 3. Apparatus 3.2 Dish of aluminium or glass with tight-fitting lid 3.3 Electrically heated constant-temperature oven. 3.4 Desiccator with dry drying agent 4. Procedure An empty dish (3.2) is dried 1/2 hour in oven (3.3) at 130 o C. Cool dish in desiccator (3.4) to room temperature and weigh on balance (3.1) to the nearest 1 mg. Weight = w 0 Let cool 40 min Distribute 5 g of sample in a uniform layer in dish. Close lid and weigh to the nearest 1 mg. Weight = w 1 Place the open dish with sample in oven preheated to 130 o C. Dry 90 minutes after oven has once again reached 130 o C. Close lid and cool in desiccator for 30 to 45 minutes. Weigh immediately after rem