ASTM D7677-16
(Test Method)Standard Test Method for the Continuous Measurement of Dissolved Ozone in Low Conductivity Water
Standard Test Method for the Continuous Measurement of Dissolved Ozone in Low Conductivity Water
SIGNIFICANCE AND USE
5.1 Dissolved Ozone is useful in many industries for water sanitization, TOC reduction, food preservation, cleaning-in-place of food and beverage systems, and pyrogen destruction. It is often necessary to know how much ozone has entered the water, how much remains, and the degree to which it has been removed before process use.
5.2 Some applications require that contact time, DO3 concentration integrated over time, be calculated, to assure disinfection.
5.3 Continuous observation of trends in these measurements are needed for continuous quality monitoring and the measurement may be used for closed loop control of ozonation.
5.4 In many pure water applications and especially where water quality is regulated by the FDA or similar enforcement agencies, ozone removal must be complete before the water is used. This test method is useful for detecting and determining dissolved ozone levels in water at the trace level as well as at process concentrations where sanitization and chemical reactions occur.
SCOPE
1.1 This test method covers the on-line and in-line determination of dissolved ozone (DO3) in low conductivity water in the range from 0.001 mg/L to 5.0 mg/L DO3 and conductivity 3 is detected by correlating the response of a membrane-covered electrochemical sensor to the dissolved ozone concentration.
1.2 This test method provides a more convenient means for continuous measurement than the colorimetric methods typically used for grab sample measurements.
1.3 This test method has the advantage of high sensitivity as well as durability in the process environment and has few interferences.
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.
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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: D7677 − 16
Standard Test Method for the
Continuous Measurement of Dissolved Ozone in Low
1
Conductivity Water
This standard is issued under the fixed designation D7677; 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 3. Terminology
1.1 This test method covers the on-line and in-line determi- 3.1 Definitions—For definitions of terms used in this
standard, refer to Terminology D1129.
nation of dissolved ozone (DO ) in low conductivity water in
3
the range from 0.001 mg/L to 5.0 mg/L DO and conductivity
3
3.2 Definitions of Terms Specific to This Standard:
<100 µS/cm, typical of pharmaceutical and microelectronics
3.2.1 dissolved ozone (DO ), n—Ozone is the tri-atomic
3
pure waters. DO is detected by correlating the response of a
3
form of oxygen and, when dissolved in water, is uniformly
membrane-covered electrochemical sensor to the dissolved
dispersed and remains in molecular form.
ozone concentration.
4. Summary of Test Method
1.2 This test method provides a more convenient means for
4.1 Dissolved ozone measurements are made on a flowing
continuous measurement than the colorimetric methods typi-
water sample containing dissolved ozone gas.
cally used for grab sample measurements.
4.2 The sensor flow housing is connected to a process-water
1.3 This test method has the advantage of high sensitivity as
sample line or the sensor probe is inserted into a pipe or vessel
well as durability in the process environment and has few
with flowing water.
interferences.
4.3 The ozone gas permeates the sensor membrane and is
1.4 The values stated in SI units are to be regarded as
reduced to oxygen and hydroxide ion at the sensor’s cathode at
standard. No other units of measurement are included in this
a controlled potential, producing a current flow in direct
standard.
proportion to the partial pressure of ozone in the sample
1.5 This standard does not purport to address all of the
outside the membrane.
safety concerns, if any, associated with its use. It is the
4.4 The current is correlated with a calibration curve in the
responsibility of the user of this standard to establish appro-
measuring instrument, accounting for temperature effects on
priate safety and health practices and determine the applica-
membrane permeation rate and on the solubility of ozone in
bility of regulatory limitations prior to use.
water. This correlation provides the conversion from ozone
partial pressure to concentration.
2. Referenced Documents
2 4.5 The instrument readout is provided in units of mg/L
2.1 ASTM Standards:
(ppm) or µg/L (ppb). For the purposes of this standard, the
D1129 Terminology Relating to Water
paired units are considered equivalent.
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of
5. Significance and Use
Applicable Test Methods of Committee D19 on Water
5.1 Dissolved Ozone is useful in many industries for water
D3370 Practices for Sampling Water from Closed Conduits
sanitization, TOC reduction, food preservation, cleaning-in-
place of food and beverage systems, and pyrogen destruction.
It is often necessary to know how much ozone has entered the
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
water, how much remains, and the degree to which it has been
and is the direct responsibility of Subcommittee D19.03 on Sampling Water and
removed before process use.
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
On-Line Water Analysis, and Surveillance of Water.
5.2 Some applications require that contact time, DO con-
3
Current edition approved July 15, 2016. Published July 2016. Originally
centration integrated over time, be calculated, to assure disin-
approved in 2011. Last previous edition approved in 2011 as D7677 – 11. DOI:
fection.
10.1520/D7677-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3 Continuousobservationoftrendsinthesemeasurements
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
are needed for continuous quality monitoring and the measure-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ment may be used for closed loop control of ozonation.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7677 − 16
5.
...
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: D7677 − 11 D7677 − 16
Standard Test Method for the
Continuous Measurement of Dissolved Ozone in Low
1
Conductivity Water
This standard is issued under the fixed designation D7677; 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 on-line and in-line determination of dissolved ozone (DO ) in low conductivity water in the
3
range from 0.001 mg/L to 5.0 mg/L DO and conductivity < 100 <100 μS/cm, typical of pharmaceutical and microelectronics pure
3
waters. DO is detected by correlating the response of a membrane-covered electrochemical sensor to the dissolved ozone
3
concentration.
1.2 This test method provides a more convenient means for continuous measurement than the colorimetric methods typically
used for grab sample measurements.
1.3 This test method has the advantage of high sensitivity as well as durability in the process environment and has few
interferences.
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:
D1129 Terminology Relating to Water
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
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, standard, refer to Terminology D1129.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 dissolved ozone (DO ), n—Ozone is the tri-atomic form of oxygen and, when dissolved in water, is uniformly dispersed
3
and remains in molecular form.
4. Summary of Test Method
4.1 Dissolved ozone measurements are made on a flowing water sample containing dissolved ozone gas.
4.2 The sensor flow housing is connected to a process-water sample line or the sensor probe is inserted into a pipe or vessel
with flowing water.
4.3 The ozone gas permeates the sensor membrane and is reduced to oxygen and hydroxide ion at the sensor’s cathode at a
controlled potential of approximately +350 mV, potential, producing a current flow in direct proportion to the partial pressure of
ozone in the sample outside the membrane.
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 Feb. 1, 2011July 15, 2016. Published March 2011July 2016. Originally approved in 2011. Last previous edition approved in 2011 as D7677 –
11. DOI: 10.1520/D7677-11.10.1520/D7677-16.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7677 − 16
4.4 The current is correlated with a calibration curve in the measuring instrument, accounting for temperature effects on
membrane permeation rate and on the solubility of ozone in water. This correlation provides the conversion from ozone partial
pressure to concentration.
4.5 The instrument readout is provided in units of mg/L (ppm) or μg/L (ppb). For the purposes of this standard, the paired units
are considered equivalent.
5. Significance and Use
5.1 Dissolved Ozone is useful in many industries for water sanitization, TOC reduction, food preservation, cleaning-in-place of
food and beverage systems, and pyrogen destruction. It is often necessary to know how much ozone has entered the water, how
much remains, and the degree to which it has been removed before process use.
5.2 Some applications require that contact time, DO concentration integrated over time,
...
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: D7677 − 16
Standard Test Method for the
Continuous Measurement of Dissolved Ozone in Low
1
Conductivity Water
This standard is issued under the fixed designation D7677; 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 3. Terminology
3.1 Definitions—For definitions of terms used in this
1.1 This test method covers the on-line and in-line determi-
nation of dissolved ozone (DO ) in low conductivity water in standard, refer to Terminology D1129.
3
the range from 0.001 mg/L to 5.0 mg/L DO and conductivity
3
3.2 Definitions of Terms Specific to This Standard:
<100 µS/cm, typical of pharmaceutical and microelectronics
3.2.1 dissolved ozone (DO ), n—Ozone is the tri-atomic
3
pure waters. DO is detected by correlating the response of a
3
form of oxygen and, when dissolved in water, is uniformly
membrane-covered electrochemical sensor to the dissolved
dispersed and remains in molecular form.
ozone concentration.
4. Summary of Test Method
1.2 This test method provides a more convenient means for
4.1 Dissolved ozone measurements are made on a flowing
continuous measurement than the colorimetric methods typi-
water sample containing dissolved ozone gas.
cally used for grab sample measurements.
4.2 The sensor flow housing is connected to a process-water
1.3 This test method has the advantage of high sensitivity as
sample line or the sensor probe is inserted into a pipe or vessel
well as durability in the process environment and has few
with flowing water.
interferences.
4.3 The ozone gas permeates the sensor membrane and is
1.4 The values stated in SI units are to be regarded as
reduced to oxygen and hydroxide ion at the sensor’s cathode at
standard. No other units of measurement are included in this
a controlled potential, producing a current flow in direct
standard.
proportion to the partial pressure of ozone in the sample
1.5 This standard does not purport to address all of the
outside the membrane.
safety concerns, if any, associated with its use. It is the
4.4 The current is correlated with a calibration curve in the
responsibility of the user of this standard to establish appro-
measuring instrument, accounting for temperature effects on
priate safety and health practices and determine the applica-
membrane permeation rate and on the solubility of ozone in
bility of regulatory limitations prior to use.
water. This correlation provides the conversion from ozone
partial pressure to concentration.
2. Referenced Documents
2 4.5 The instrument readout is provided in units of mg/L
2.1 ASTM Standards:
(ppm) or µg/L (ppb). For the purposes of this standard, the
D1129 Terminology Relating to Water
paired units are considered equivalent.
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of
5. Significance and Use
Applicable Test Methods of Committee D19 on Water
5.1 Dissolved Ozone is useful in many industries for water
D3370 Practices for Sampling Water from Closed Conduits
sanitization, TOC reduction, food preservation, cleaning-in-
place of food and beverage systems, and pyrogen destruction.
It is often necessary to know how much ozone has entered the
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
water, how much remains, and the degree to which it has been
and is the direct responsibility of Subcommittee D19.03 on Sampling Water and
removed before process use.
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
On-Line Water Analysis, and Surveillance of Water.
5.2 Some applications require that contact time, DO con-
3
Current edition approved July 15, 2016. Published July 2016. Originally
centration integrated over time, be calculated, to assure disin-
approved in 2011. Last previous edition approved in 2011 as D7677 – 11. DOI:
fection.
10.1520/D7677-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3 Continuous observation of trends in these measurements
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
are needed for continuous quality monitoring and the measure-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ment may be used for closed loop control of ozonation.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7677 − 16
5.4 In many pure water applications and especially where 6.7.1 Sample lines must be short and run at high flow
water quality is regulated by t
...
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