ASTM D1125-14

Standard Test Methods for Electrical Conductivity and Resistivity of Water (Withdrawn 2023)

SIGNIFICANCE AND USE
4.1 These test methods are applicable for such purposes as impurity detection and, in some cases, the quantitative measurement of ionic constituents dissolved in waters. These include dissolved electrolytes in natural and treated waters, such as boiler water, boiler feedwater, cooling water, and saline and brackish water.  
4.1.1 Their concentration may range from trace levels in pure waters (2)4 to significant levels in condensed steam (see Test Methods D2186 and D4519, and Ref (3)), or pure salt solutions.  
4.1.2 Where the principal interest in the use of conductivity methods is to determine steam purity, see Ref (4). These test methods may also be used for checking the correctness of water analyses (5).
SCOPE
1.1 These test methods cover the determination of the electrical conductivity and resistivity of water. The following test methods are included:    
Range  
Sections  
Test Method A—Field and Routine Laboratory  
10 to 200 000  
12 to 18  
Measurement of Static (Non-Flowing) Samples  
μS/cm  
Test Method B—Continuous In-Line Measure  
5 to 200 000  
19 to 23  
ment  
μS/cm  
1.2 These test methods have been tested in reagent water. It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices.  
1.3 For measurements below the range of these test methods, refer to Test Method D5391.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Jan-2014
• ICS: 13.060.60 - Examination of physical properties of water
• Technical Committee: D19 - Water
• Drafting Committee: D19.03 - Sampling Water and Water-Formed Deposits, Analysis of Water for Power Generation and Process Use, On-Line Water Analysis, and Surveillance of Water

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D1125 − 14
Standard Test Methods for
1
Electrical Conductivity and Resistivity of Water
This standard is issued under the fixed designation D1125; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D1193Specification for Reagent Water
D2186Test Methods for Deposit-Forming Impurities in
1.1 These test methods cover the determination of the
Steam
electrical conductivity and resistivity of water. The following
D2777Practice for Determination of Precision and Bias of
test methods are included:
Applicable Test Methods of Committee D19 on Water
Range Sections
D3370Practices for Sampling Water from Closed Conduits
Test Method A—Field and Routine Laboratory 10 to 200 000 12 to 18
Measurement of Static (Non-Flowing) µS/cm D4519Test Method for On-Line Determination of Anions
Samples
and Carbon Dioxide in High Purity Water by Cation
Test Method B—Continuous In-Line Measure 5 to 200 000 19 to 23
Exchange and Degassed Cation Conductivity
ment µS/cm
D5391Test Method for Electrical Conductivity and Resis-
1.2 These test methods have been tested in reagent water. It
tivity of a Flowing High Purity Water Sample
is the user’s responsibility to ensure the validity of these test
E2251Specification for Liquid-in-Glass ASTM Thermom-
methods for waters of untested matrices.
eters with Low-Hazard Precision Liquids
1.3 For measurements below the range of these test
3. Terminology
methods, refer to Test Method D5391.
3.1 Definitions:
1.4 The values stated in SI units are to be regarded as
3.1.1 electrical conductivity, n—the reciprocal of the a-c
standard. No other units of measurement are included in this
resistance in ohms measured between opposite faces of a
standard.
centimetre cube of an aqueous solution at a specified tempera-
1.5 This standard does not purport to address all of the
ture.
safety concerns, if any, associated with its use. It is the
3.1.1.1 Discussion—The unit of electrical conductivity is
responsibility of the user of this standard to establish appro-
siemenspercentimetre.(Thepreviouslyusedunitsofmhos/cm
priate safety and health practices and determine the applica-
are numerically equivalent to S/cm.) The actual resistance of
bility of regulatory limitations prior to use.
the cell, R , is measured in ohms. The conductance, 1/R,is
x x
2
directlyproportionaltothecross-sectionalarea,A(incm ),and
2. Referenced Documents
inversely proportional to the length of the path, L (in cm):
2
2.1 ASTM Standards:
1/R 5 K·A/L
x
D1066Practice for Sampling Steam
The conductance measured between opposite faces of a cen-
D1129Terminology Relating to Water
timetre cube, K, is called conductivity. Conductivity values
D1192Guide for Equipment for Sampling Water and Steam
are usually expressed in microsiemens/centimetre or in
3
in Closed Conduits (Withdrawn 2003)
siemens/centimetre at a specified temperature, normally
25°C.
3.1.2 electrical resistivity, n—the a-c resistance in ohms
1
These test methods are under the jurisdiction of Committee D19 on Water and
measured between opposite faces of a centimetre cube of an
are the direct responsibility of Subcommittee D19.03 on Sampling Water and
aqueous solution at a specified temperature.
Water-Formed Deposits,Analysis of Water for Power Generation and Process Use,
On-Line Water Analysis, and Surveillance of Water. 3.1.2.1 Discussion—Theunitofelectricalresistivityisohm-
Current edition approved Feb. 1, 2014. Published March 2014. Originally
centimetre.The actual resistance of the cell, R , is measured in
x
approved in 1950. Last previous edition approved in 2009 as D1125–95 (2009).
ohms, and is directly proportional to the length of the path, L
DOI: 10.1520/D1125-14.
2 (in cm), and inversely proportional to the cross-sectional area,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
2
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
A (in cm ):
Standards volume information, refer to the standard’s Document Summary page on
R 5 R·L/A
the ASTM website. x
3
The resistance measured between opposite faces of a centi-
The last approved version of this historical standard is referenced on
www.astm.org. metre cube, R, is called resistivity. Resistivity values are
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D1125 − 14
A
TABLE 1 Electrical Conductivity Values Assigned to the Potassium Chloride in the Reference Solution
Ap
...

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: D1125 − 95 (Reapproved 2009) D1125 − 14
Standard Test Methods for
1
Electrical Conductivity and Resistivity of Water
This standard is issued under the fixed designation D1125; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 These test methods cover the determination of the electrical conductivity and resistivity of water. The following test methods
are included:
Range Sections
Test Method A—Field and Routine Laboratory 10 to 200 000 12 to 18
Test Method A—Field and Routine Laboratory 10 to 200 000 12 to 18
Measurement of Static (Non-Flowing) μS/cm
Samples
Test Method B—Continuous In-Line Measure 5 to 200 000 19 to 23
Test Method B—Continuous In-Line Measure 5 to 200 000 19 to 23
ment μ S/cm
ment μS/cm
1.2 These test methods have been tested in reagent water. It is the user’s responsibility to ensure the validity of these test
methods for waters of untested matrices.
1.3 For measurements below the range of these test methods, refer to Test Method D5391.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D1066 Practice for Sampling Steam
D1129 Terminology Relating to Water
3
D1192 Guide for Equipment for Sampling Water and Steam in Closed Conduits (Withdrawn 2003)
D1193 Specification for Reagent Water
D2186 Test Methods for Deposit-Forming Impurities in Steam
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits
D4519 Test Method for On-Line Determination of Anions and Carbon Dioxide in High Purity Water by Cation Exchange and
Degassed Cation Conductivity
D5391 Test Method for Electrical Conductivity and Resistivity of a Flowing High Purity Water Sample
E1E2251 Specification for ASTM Liquid-in-Glass ThermometersLiquid-in-Glass ASTM Thermometers with Low-Hazard
Precision Liquids
3. Terminology
3.1 Definitions:
1
These test methods are under the jurisdiction of Committee D19 on Water and are the direct responsibility of Subcommittee D19.03 on Sampling Water and Water-Formed
Deposits, Analysis of Water for Power Generation and Process Use, On-Line Water Analysis, and Surveillance of Water.
Current edition approved May 1, 2009Feb. 1, 2014. Published June 2009March 2014. Originally approved in 1950. Last previous edition approved in 20052009 as
D1125 – 95 (2009). (2005). DOI: 10.1520/D1125-95R09.10.1520/D1125-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D1125 − 14
3.1.1 electrical conductivity—conductivity, n—the reciprocal of the a-c resistance in ohms measured between opposite faces of
a centimetre cube of an aqueous solution at a specified temperature.
NOTE 1—The unit of electrical conductivity is siemens per centimetre. (The previously used units of mhos/cm are numerically equivalent to S/cm.)
2
The actual resistance of the cell, R , is measured in ohms. The conductance, 1/R , is directly proportional to the cross-sectional area, A (in cm ), and
x x
inversely proportional to the length of the path, L (in cm):
1/R 5 K·A/L
x
3.1.1.1 Discussion—
The unit of electrical conductivity is siemens per centimetre. (The previously used units of mhos/cm are numerically equivalent
to S/cm.) The actual resistance of the cell, R , is measured in ohms. The conductance, 1/R , is directly proportional to the
x x
2
cross-sectional area, A (in cm ), and inversely proportion
...