Any help would be much appreciated and thanks in advance! I have a selection of 50ml frozen water samples that I need to conduct ammonia assays on and was wondering how long is "safe" enough to leave the defrosted samples without degrading the sample. Can I leave them overnight to defrost and analyse them the following morning or is this too long?
Thanks again!
Megan Jones
Carbon dioxide from the atmosphere is dissolved in water. The pH of the water can change, so keep the water in the glass ampoule thawed. Or, check the change in the pH of the water over a time that is convenient for you.
This should help. Refer to standard methods for research grade work is always the best.
https://www.standardmethods.org/doi/abs/10.2105/SMWW.2882.087
Ammonia is lighter than air and can be frozen at 77.7 degrees centigrade. Before performing an ammonia test of frozen water it is necessary to keep the water at room temperature then perform the tests.
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