ASTM D6317-15
(Test Method)Standard Test Method for Low Level Determination of Total Carbon, Inorganic Carbon and Organic Carbon in Water by Ultraviolet, Persulfate Oxidation, and Membrane Conductivity Detection
Standard Test Method for Low Level Determination of Total Carbon, Inorganic Carbon and Organic Carbon in Water by Ultraviolet, Persulfate Oxidation, and Membrane Conductivity Detection
SIGNIFICANCE AND USE
5.1 This test method is used for determination of the carbon content of water from a variety of natural, domestic, and industrial sources. In its most common form, this test method is used to measure organic carbon as a means of monitoring organic impurities in high purity process water used in industries such as nuclear power, pharmaceutical, and electronics.
SCOPE
1.1 This test method covers the determination of total carbon (TC), inorganic carbon (IC), and total organic carbon (TOC) in water in the range from 10 to 1000 μg/L of carbon. This method is for laboratory or grab sample applications and has been subjected to an interlaboratory study under the guidelines of D2777. Test Method D5997 can be used for on-line determinations. The test method utilizes persulfate or ultraviolet oxidation of organic carbon, or both coupled with a CO2 selective membrane to recover the CO2 into deionized water. The change in conductivity of the deionized water is measured and related to carbon concentration in the oxidized sample. Inorganic carbon is determined in a similar manner without the oxidation step. In both cases, the sample is acidified to facilitate CO2 recovery through the membrane. The relationship between the conductivity measurement and carbon concentration is described by a set of chemometric equations for the chemical equilibrium of CO2, HCO3– , and H+, and the relationship between the ionic concentrations and the conductivity. The chemometric model includes the temperature dependence of the equilibrium constants and the specific conductances resulting in linear response of the method over the stated range of TOC. See Test Method D4519 for a discussion of the measurement of CO2 by conductivity.
1.2 This test method has the advantage of a very high sensitivity detector that allows very low detection levels on relatively small volumes of sample. Also, use of two measurement channels allows determination of CO2 in the sample independently of organic carbon. Isolation of the conductivity detector from the sample by the CO2 selective membrane results in a very stable calibration, with minimal interferences.
1.3 This test method was used successfully with reagent water spiked with various organic materials. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices.
1.4 In addition to laboratory analyses, this test method may be adapted to on line monitoring. See Test Method D5997.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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.
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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: D6317 − 15
Standard Test Method for
Low Level Determination of Total Carbon, Inorganic Carbon
and Organic Carbon in Water by Ultraviolet, Persulfate
1
Oxidation, and Membrane Conductivity Detection
This standard is issued under the fixed designation D6317; 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 responsibility to ensure the validity of this test method for
waters of untested matrices.
1.1 This test method covers the determination of total
carbon (TC), inorganic carbon (IC), and total organic carbon 1.4 In addition to laboratory analyses, this test method may
(TOC) in water in the range from 10 to 1000 µg/L of carbon. be adapted to on line monitoring. See Test Method D5997.
This method is for laboratory or grab sample applications and
1.5 The values stated in SI units are to be regarded as
has been subjected to an interlaboratory study under the
standard. No other units of measurement are included in this
guidelines of D2777. Test Method D5997 can be used for
standard.
on-line determinations. The test method utilizes persulfate or
1.6 This standard does not purport to address all of the
ultraviolet oxidation of organic carbon, or both coupled with a
safety concerns, if any, associated with its use. It is the
CO selective membrane to recover the CO into deionized
2 2
responsibility of the user of this standard to establish appro-
water. The change in conductivity of the deionized water is
priate safety and health practices and determine the applica-
measured and related to carbon concentration in the oxidized
bility of regulatory limitations prior to use.
sample. Inorganic carbon is determined in a similar manner
without the oxidation step. In both cases, the sample is
2. Referenced Documents
acidifiedtofacilitateCO recoverythroughthemembrane.The 2
2
2.1 ASTM Standards:
relationshipbetweentheconductivitymeasurementandcarbon
D1129 Terminology Relating to Water
concentration is described by a set of chemometric equations
D1192 Guide for Equipment for Sampling Water and Steam
– +
for the chemical equilibrium of CO , HCO , and H , and the
3
2 3
in Closed Conduits (Withdrawn 2003)
relationship between the ionic concentrations and the conduc-
D1193 Specification for Reagent Water
tivity. The chemometric model includes the temperature de-
D2777 Practice for Determination of Precision and Bias of
pendence of the equilibrium constants and the specific conduc-
Applicable Test Methods of Committee D19 on Water
tancesresultinginlinearresponseofthemethodoverthestated
D3370 Practices for Sampling Water from Closed Conduits
range of TOC. See Test Method D4519 for a discussion of the
D4210 Practice for Intralaboratory Quality Control Proce-
measurement of CO by conductivity.
2
dures and a Discussion on Reporting Low-Level Data
3
1.2 This test method has the advantage of a very high
(Withdrawn 2002)
sensitivity detector that allows very low detection levels on
D5997 Test Method for On-Line Monitoring of Total
relatively small volumes of sample.Also, use of two measure-
Carbon, Inorganic Carbon in Water by Ultraviolet, Persul-
ment channels allows determination of CO in the sample
fate Oxidation, and Membrane Conductivity Detection
2
independently of organic carbon. Isolation of the conductivity
D4519 Test Method for On-Line Determination of Anions
detector from the sample by the CO selective membrane
and Carbon Dioxide in High Purity Water by Cation
2
results in a very stable calibration, with minimal interferences.
Exchange and Degassed Cation Conductivity
1.3 This test method was used successfully with reagent
3. Terminology
water spiked with various organic materials. It is the user’s
3.1 Definitions—For definitions of terms used in this test
method, refer to Terminology D1129.
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
2
and is the direct responsibility of Subcommittee D19.03 on Sampling Water and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use, contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
On-Line Water Analysis, and Surveillance of Water. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 1, 2015. Published August 2015. Originally the ASTM website.
3
approved in 1998. Last previous edition approved in 2009 as D6317
...
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: D6317 − 98 (Reapproved 2009) D6317 − 15
Standard Test Method for
Low Level Determination of Total Carbon, Inorganic Carbon
and Organic Carbon in Water by Ultraviolet, Persulfate
1
Oxidation, and Membrane Conductivity Detection
This standard is issued under the fixed designation D6317; 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 test method covers the determination of total carbon (TC), inorganic carbon (IC), and total organic carbon (TOC) in
water in the range from 10 to 1000 μg/L of carbon. This method is for laboratory or grab sample applications and has been
subjected to an interlaboratory study under the guidelines of D2777. Test Method D5997 can be used for on-line determinations.
The test method utilizes persulfate or ultraviolet oxidation of organic carbon, or both coupled with a CO selective membrane to
2
recover the CO into deionized water. The change in conductivity of the deionized water is measured and related to carbon
2
concentration in the oxidized sample. Inorganic carbon is determined in a similar manner without the oxidation step. In both cases,
the sample is acidified to facilitate CO recovery through the membrane. The relationship between the conductivity measurement
2
– +
and carbon concentration is described by a set of chemometric equations for the chemical equilibrium of CO , HCO , and H ,
2 3
and the relationship between the ionic concentrations and the conductivity. The chemometric model includes the temperature
dependence of the equilibrium constants and the specific conductances resulting in linear response of the method over the stated
range of TOC. See Test Method D4519 for a discussion of the measurement of CO by conductivity.
2
1.2 This test method has the advantage of a very high sensitivity detector that allows very low detection levels on relatively
small volumes of sample. Also, use of two measurement channels allows determination of CO in the sample independently of
2
organic carbon. Isolation of the conductivity detector from the sample by the CO selective membrane results in a very stable
2
calibration, with minimal interferences.
1.3 This test method was used successfully with reagent water spiked with various organic materials. It is the user’s
responsibility to ensure the validity of this test method for waters of untested matrices.
1.4 In addition to laboratory analyses, this test method may be adapted to on line monitoring. See Test Method D5997.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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:
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
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
D4210 Practice for Intralaboratory Quality Control Procedures and a Discussion on Reporting Low-Level Data (Withdrawn
3
2002)
1
This test method is under the jurisdiction of ASTM Committee D19 on Water and is 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 Oct. 1, 2009May 1, 2015. Published November 2009August 2015. Originally approved in 1998. Last previous edition approved in 20042009
as D6317 – 98 (2004).(2009). DOI: 10.1520/D6317-98R09.10.1520/D6317-15.
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.
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...
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