1. weighing Plate + Silicon Dioxide (20.00 g) and glass bars for people. Write down the exact total weight in all (A) ฏ 2. weighing samples into 1 g 5.0000 ~ ฏ 3. mash, for example, and Silicon Dioxide glass & bar together with arrangement. The surface area for evaporation, spread the most cup full as possible. ฏ4. Silicon Dioxide weighing Plate + Cup + sticks glass and, for example, write down the exact gross weight at all (B) is the weight of dry construction dialogues. 5. bring to the Oven Roasted long 105° C 4 hours. ฏ6. set to cool in the Desiccator long 30 minutes. ฏ7. Silicon Dioxide weighing Plate + Cup + sticks glass and, for example, write down the exact total weight in all (C) as the weight after drying.
การแปล กรุณารอสักครู่..