ASTM D5032-19
(Practice)Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions
SIGNIFICANCE AND USE
4.1 Controlled relative humidity environments are important for conditioning materials for shelf-life studies or for investigating the change in physical or dielectric properties after exposure.
4.2 The use of aqueous-glycerin solutions reduces the possibility of contamination of the materials or corrosion of electrode systems which would be more likely to result from saturated salt or acid water solutions.
4.3 Applicable material specifications shall state the exposure conditions, including time, temperature and relative humidity that a material is to be subjected to before subsequent testing. Typical conditions are given in Practice D618 or D6054.
SCOPE
1.1 This practice describes a method for obtaining constant relative humidity ranging from 30 to 98 % at temperatures ranging from 0 to 70°C in relatively small containers by means of an aqueous glycerin solution.
1.2 This practice is applicable for closed systems such as environmental conditioning containers.
1.3 This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless precautionary criteria are followed to ensure source stability.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5032 − 19
Standard Practice for
Maintaining Constant Relative Humidity by Means of
1
Aqueous Glycerin Solutions
This standard is issued under the fixed designation D5032; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Other Documents:
4
DIN50008 Constant Climates over Aqueous Solutions
1.1 This practice describes a method for obtaining constant
Part 1:Saturated Salt and Glycerol Solutions
relative humidity ranging from 30 to 98% at temperatures
Part 2:Sulfuric Acid Solutions (1981)
rangingfrom0to70°Cinrelativelysmallcontainersbymeans
of an aqueous glycerin solution.
3. Summary of Practice
1.2 This practice is applicable for closed systems such as
3.1 Controlled relative humidity environments are gener-
environmental conditioning containers.
ated using mixtures of glycerin and water.
1.3 This practice is not recommended for the generation of
3.2 Practice E104 contains methods for maintaining con-
continuous (flowing) streams of constant humidity unless
stant relative humidity environments using aqueous saturated
precautionary criteria are followed to ensure source stability.
salt solutions or various strength sulfuric acid-water systems.
1.4 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.1 Controlled relative humidity environments are impor-
priate safety, health, and environmental practices and deter-
tant for conditioning materials for shelf-life studies or for
mine the applicability of regulatory limitations prior to use.
investigating the change in physical or dielectric properties
1.5 This international standard was developed in accor-
after exposure.
dance with internationally recognized principles on standard-
4.2 The use of aqueous-glycerin solutions reduces the pos-
ization established in the Decision on Principles for the
sibility of contamination of the materials or corrosion of
Development of International Standards, Guides and Recom-
electrode systems which would be more likely to result from
mendations issued by the World Trade Organization Technical
saturated salt or acid water solutions.
Barriers to Trade (TBT) Committee.
4.3 Applicable material specifications shall state the expo-
sure conditions, including time, temperature and relative hu-
2. Referenced Documents
midity that a material is to be subjected to before subsequent
2
2.1 ASTM Standards:
testing. Typical conditions are given in Practice D618 or
D618Practice for Conditioning Plastics for Testing
D6054.
D6054Practice for Conditioning Electrical Insulating Mate-
3
rials for Testing (Withdrawn 2012) 5. Apparatus
E104Practice for Maintaining Constant Relative Humidity
5.1 Container, airtight, of a material not acted upon by
by Means of Aqueous Solutions
coppersulfate(orwiththeglycerinsolutioncontainedinatray
made of a material not acted upon by copper sulfate).
5.2 Refract meter, covering the range of 1.33 to 1.47
1
This practice is under the jurisdiction of ASTM Committee D09 on Electrical
(sodium) with an accuracy of 0.0003.
and Electronic Insulating Materials and is the direct responsibility of Subcommittee
D09.12 on Electrical Tests.
6. Glycerin Solution
Current edition approved March 1, 2019. Published March 2019. Originally
approved in 1990. Last previous edition approved in 2011 as D5032–11. DOI:
6.1 Use a good industrial grade of glycerin (“high gravity”
10.1520/D5032-19.
2 and “dynamite” grades have been found to be satisfactory) in
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
4
the ASTM website. Available from Deutsches Institut fur Normung, 4-10 Burggrenzenstrasse
3
The last approved version of this historical standard is referenced on Postfach 1107, D-1000 Berlin, Germany. Also available from American National
www.astm.org. Standards Institute, 25 W. 43rd St., 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5032 − 19
distilled water. Calculate the concentration in terms of the Proper precaution must be taken to prevent the reduction of
refractive inde
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5032 − 11 D5032 − 19
Standard Practice for
Maintaining Constant Relative Humidity by Means of
1
Aqueous Glycerin Solutions
This standard is issued under the fixed designation D5032; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice describes a method for obtaining constant relative humidity ranging from 30 to 98 % at temperatures ranging
from 0 to 70°C in relatively small containers by means of an aqueous glycerin solution.
1.2 This practice is applicable for closed systems such as environmental conditioning containers.
1.3 This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless
precautionary criteria are followed to ensure source stability.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
3
D4023 Terminology Relating to Humidity Measurements (Withdrawn 2002)
3
D6054 Practice for Conditioning Electrical Insulating Materials for Testing (Withdrawn 2012)
E104 Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
2.2 Other Documents:
4
DIN50008 Constant Climates over Aqueous Solutions
Part 1: Saturated Salt and Glycerol Solutions
Part 2: Sulfuric Acid Solutions (1981)
3. Summary of Practice
3.1 Controlled relative humidity environments are generated using mixtures of glycerin and water.
3.2 Practice E104 contains methods for maintaining constant relative humidity environments using aqueous saturated salt
solutions or various strength sulfuric acid-water systems.
4. Significance and Use
4.1 Controlled relative humidity environments are important for conditioning materials for shelf-life studies or for investigating
the change in physical or dielectric properties after exposure.
1
This practice is under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of Subcommittee D09.12
on Electrical Tests.
Current edition approved Aug. 1, 2011March 1, 2019. Published September 2011March 2019. Originally approved in 1990. Last previous edition approved in 20032011
as D5032 – 97D5032 – 11.(2003). DOI: 10.1520/D5032-11.10.1520/D5032-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
4
Available from Deutsches Institut fur Normung, 4-10 Burggrenzenstrasse Postfach 1107, D-1000 Berlin, Germany. Also available from American National Standards
Institute, 25 W. 43rd St., 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5032 − 19
4.2 The use of aqueous-glycerin solutions reduces the possibility of contamination of the materials or corrosion of electrode
systems which would be more likely to result from saturated salt or acid water solutions.
4.3 Applicable material specifications shouldshall state the exposure conditions, including time, temperature and relative
humidity that a material should is to be subjected to before subsequent testing. Typical conditions are given in Practice D618 or
D6054.
5. Apparatus
5.1 Container, airtight, of a material not acted upon by copper sulfate (or with the glycerin solution contained in a tray made
of a material not acted upon by copper sulfate).
5.2 Refract meter, covering the range of 1.33 to 1.47 (sodium) with
...
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