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ASTM International - ASTM E104-85(1996)

Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions

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Organization: ASTM International
Publication Date: 1 January 1996
Status: inactive
Page Count: 3
ICS Code (Environmental testing): 19.040
scope:

1.1 This practice describes two methods for generating constant relative humidity (rh) environments in relatively small containers.

1.2 This practice is applicable for obtaining constant relative humidities ranging from dryness to near saturation at temperatures spanning from 0 to 50°C.

1.3 This practice is applicable for closed systems such as environmental conditioning containers and for the calibration of hygrometers.

1.4 This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless precautionary criteria are followed to ensure source stability. (See Section 9.)

1.5 Caution-Both saturated salt solutions and sulfuric acid-water solutions are extremely corrosive, and care should be taken in their preparation and handling. There is also the possibility of corrosive vapors in the atmospheres over the saturated salt solutions and over the sulfuric acid solution.

1.6 This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For more specific safety precautionary information see 1.5 and 10.1.

Document History

November 1, 2020
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
1.1 This practice describes one method for generating constant relative humidity (rh) environments in relatively small containers. 1.2 This practice is applicable for obtaining constant relative...
March 1, 2020
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
1.1 This practice describes one method for generating constant relative humidity (rh) environments in relatively small containers. 1.2 This practice is applicable for obtaining constant relative...
April 1, 2012
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
Standard value relative humidity environments are important for conditioning materials in shelf-life studies or in the testing of mechanical properties such as dimensional stability and strength....
October 1, 2007
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
1.1 This practice describes one method for generating constant relative humidity (rh) environments in relatively small containers. 1.2 This practice is applicable for obtaining constant relative...
October 10, 2002
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
1.1 This practice describes one method for generating constant relative humidity (rh) environments in relatively small containers. 1.2 This practice is applicable for obtaining constant relative...
ASTM E104-85(1996)
January 1, 1996
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
1.1 This practice describes two methods for generating constant relative humidity (rh) environments in relatively small containers. 1.2 This practice is applicable for obtaining constant relative...
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