Difference between revisions of "Saturated salt solutions"
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Percent relative humidities produced at 20 C (Greenspan 1977): | Percent relative humidities produced at 20 C (Greenspan 1977): | ||
| − | * lithium chloride = 12.4 | + | * [[lithium chloride]] = 12.4 |
| − | * potassium acetate = 23.3 | + | * [[potassium acetate]] = 23.3 |
| − | * magnesium chloride = 33.6 | + | * [[magnesium chloride]] = 33.6 |
| − | * potassium carbonate = 44 | + | * [[potassium carbonate]] = 44 |
* potassium nitrite = 49 | * potassium nitrite = 49 | ||
| − | * magnesium nitrate = 54.9 | + | * [[magnesium nitrate]] = 54.9 |
| − | * sodium nitrite = 65.3 | + | * [[sodium nitrite]] = 65.3 |
| − | * sodium chloride = 75.5 | + | * [[sodium chloride]] = 75.5 |
| − | * ammonium sulfate = 80.6 | + | * [[ammonium sulfate]] = 80.6 |
| − | * potassium nitrate = 93.2 | + | * [[potassium nitrate]] = 93.2 |
| − | * potassium sulfate = 97.2 | + | * [[potassium sulfate]] = 97.2 |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 13:35, 1 September 2020
Description
In a closed environment, saturated salt solutions can maintain an equilibrium with the moisture in the air. At low humidities, fully hydrated (liquid) salts can volatilize water. The solid salts can absorb moisture when the humidity is high.
Percent relative humidities produced at 20 C (Greenspan 1977):
- Lithium chloride = 12.4
- Potassium acetate = 23.3
- Magnesium chloride = 33.6
- Potassium carbonate = 44
- potassium nitrite = 49
- Magnesium nitrate = 54.9
- Sodium nitrite = 65.3
- Sodium chloride = 75.5
- Ammonium sulfate = 80.6
- Potassium nitrate = 93.2
- Potassium sulfate = 97.2
Synonyms and Related Terms
salt solutions
Resources and Citations
- L. Greenspan "Humidity Fixed Points of Binary Saturated Aqueous Solutions" J. Research of the NBS, Vol 81A, No. 1 1977.
- Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
- Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002