1. Burn cup tiles (crucible) dry and clean in a furnace, 550 DEG C for 1 hours and then cooled in a jar of moisture absorption (desiccators). Weighing record
2. Weighing sample grinder about 3 grams. Put down the cup tiles (crucible)
3.Burn the samples on hot plate (in the fume hood) until all the smoke
4. By burning in the furnace at 550 degrees Celsius for 3-4 hours. Until the sample becomes the white ash
5.Clamp cup tiles out of the furnace. Leave it to cool, moisture absorption in a jar (desicator). And then weighed cup
6, tile. Calculate the percentage of ash from the formula
.
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