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Dissolving Samples in Nitric Acid
After the samples were weighed and these weights were recorded, and several drops of distilled water were added to the fluffy ash in each crucible. The samples were then dissolved into 8 ml of 6N HNO3-. After the samples were put into solution, the crucibles were placed on a hot plate and simmered for 5 to 10 minutes. Each crucible was removed once the solution had begun to roil, indicated by a subtle swirling motion. After it was removed from the hot plate, each sample was filtered through #41 filter paper into a 50 ml volumetric flask. Each crucible was thoroughly rinsed twice with distilled water to remove any remaining sample solution. Each sample was then diluted to a total of 50 ml with distilled water and homogenized by shaking. The contents of each flask were then poured into 60 ml nalgene plastic bottles and labeled according to the sample number.
Always wear safety goggles...
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Wendy tries the acid...
Crucibles ready to roil...
Fran tried the acid...
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