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ASTM D2780-92(1997)

(Test Method)

Standard Test Method for Solubility of Fixed Gases in Liquids

Standard Test Method for Solubility of Fixed Gases in Liquids

SCOPE
1.1 This test method covers the determination of the solubility of fixed gases in liquids. It is suitable for gases and liquids that do not react with each other and are compatible with borosilicate glass, mercury, stainless steel, PTFE (polytetrafluoroethylene), and FPM (vinylidene fluoridehexafluoro propylene copolymer) under the conditions of the test. This test method also covers the determination of the concentration of fixed gases in solutions which are not saturated with the gas.  
1.2 This standard does not purport to address all of the safety problems, if any, 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 specific hazard statements see Notes 3, 4, 5, 7, and 12.  
1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.

General Information

Status
Historical
Publication Date
31-Dec-1996
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Current Stage
Ref Project

Relations

Replaced By
ASTM D2780-92(2002)e1 - Standard Test Method for Solubility of Fixed Gases in Liquids
Effective Date
15-Oct-1992

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ASTM D2780-92(1997) - Standard Test Method for Solubility of Fixed Gases in LiquidsASTM D2780-92(1997) - Standard Test Method for Solubility of Fixed Gases in Liquids
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ASTM D2780-92(1997) - Standard Test Method for Solubility of Fixed Gases in Liquids
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact
ASTM International (www.astm.org) for the latest information.
Designation: D 2780 – 92 (Reapproved 1997) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
1
Solubility of Fixed Gases in Liquids
This standard is issued under the fixed designation D 2780; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This test method covers the determination of the solu- 4.1 The solubility of fixed gases in liquids is an important
bility of fixed gases in liquids. It is suitable for gases and engineering parameter in the design of hydraulic systems. It is
liquids that do not react with each other and are compatible a measure of the amount of gas which can be released from
with borosilicate glass, mercury, stainless steel, PTFE (poly- solution when a system undergoes changes in pressure and
tetrafluoroethylene), and FPM (vinylidene fluoride-hexafluoro temperature. Theoretical considerations permit approximate
propylene copolymer) under the conditions of the test. This test values of gas solubility to be computed with reasonable
method also covers the determination of the concentration of accuracy. In this test method, dissolved gases are separated
fixed gases in solutions which are not saturated with the gas. physically from a liquid and measured volumetrically. The test
1.2 This standard does not purport to address all of the method permits subsequent analysis of separated gases by any
safety concerns, if any, associated with its use. It is the appropriate method.
responsibility of the user of this standard to establish appro-
5. Apparatus
priate safety and health practices and determine the applica-
5.1 Ambient Pressure Saturator, suitable for the saturation
bility of regulatory limitations prior to use. For specific hazard
of liquids with fixed gases at various temperatures at ambient
statements see Notes 3-5, Note 7, and Note 12.
pressure is shown in Fig. 1. The system comprises four parts:
1.3 The values stated in SI units are to be regarded as the
5.1.1 Gas Supply and Pressure Regulator,
standard. The values in parentheses are for information only.
5.1.2 Gas Dispersion Element,
2. Referenced Documents
5.1.3 Heating Mantle, to fit 1000-mL separatory funnel
2.1 ASTM Standards:
(Fig. 1), and
D 831 Test Method for Gas Content of Cable and Capacitor
5.1.4 Temperature Measurement and Control Devices.
2
Oils
NOTE 1—In the event that it is desired to saturate a liquid with a toxic
D 2883 Test Method for Reaction Threshold Temperature of
or flammable gas, the use of this system is not recommended, unless
3
Liquid and Solid Materials
suitable means are provided for the collection and disposal of the escaping
D 4057 Practice for Manual Sampling of Petroleum and
gas.
3
Petroleum Products
5.2 Elevated Pressure Saturator, used to saturate liquids
4
E 260 Practice for Packed Column Gas Chromatography
with gases at pressures other than ambient. A suitable vessel,
usable at pressures up to 608 kPa (6 atm), is illustrated in Fig.
3. Summary of Test Method
2. The vessel consists of a 2.5 L stainless steel bomb with a
3.1 A specimen of the test liquid is saturated with a fixed gas
thermostatic control jacket. A valve at one end is connected to
under specified conditions of temperature and pressure. The
a pressure gage and gas supply. A valve at the other end is
saturation step may be eliminated if it is desired to determine
provided with a fitting that connects directly to the gas
the concentration of fixed gas in a liquid sample suitably
extraction apparatus.
presented for analysis. A portion of the solution of gas in liquid
5.2.1 Thermostatic Control, for jacket of saturator.
is transferred to a gas extraction apparatus in which the fixed
5.2.2 Shaker, reciprocating, horizontal.
gas is quantitatively removed from the liquid. The separated
5.2.3 Vacuum Pump, rotary.
gas is transferred to a gas buret in which its volume is
5.2.4 Transfer Line, with two male socket joint 12/2 fittings.
determined.
5
5.3 Gas Extraction System, as shown schematically in Fig.
3. A detailed drawing of the extraction chamber is shown in
1
This test method is under the jurisdiction of ASTM Committee D-2 on
Fig. 4. The apparatus provides for the separation of dissolved
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
gases from a liquid by repeatedly forcing the liquid containing
D02.11on Engineering Sciences of High Performance Fluids and Solids.
gas to pass through a narrow annular passage under redu
...

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