Identify two potential sources of error when prepare samples
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Identify two potential sources of error when prepare samples

Task 3: DETERMINATION OF MINERAL CONTENT

1. Tabulate your result in the following format.


2. Identify two potential sources of error when prepare samples for ash analysis.

3. You wish to have at least 100 mg of ash from a cereal grain. Assuming 2.5% ash on average, how many grams of the grain should be weighed for ashing?

Hint
Science2.  The petri dish was dried in a desiccator to prevent atmospheric moisture from entering the sample. To eliminate weight inaccuracies caused by moisture addition when handling with bare hands, the dish was always handled with tongs. The dish was left uncovered to allow maximal moisture evaporation from the sample during the drying process in the hot air oven, if not handled appropriate...
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