ASTM D5543-15

Standard Test Method for Low-Level Dissolved Oxygen in Water

SIGNIFICANCE AND USE
5.1 Dissolved oxygen is detrimental in certain boiler and steam cycles because it may accelerate corrosion. Concentrations above 10 μg/L are unacceptable in many high-pressure boiler systems. The efficiency of dissolved oxygen removal from boiler feedwater by chemical or mechanical means, or both, is determined by measuring the concentration before and after the process. The measurement is also made to check for air leakage into the boiler system.  
5.2 The oxygen treatment method for boiler corrosion reduction requires injection of oxygen into the boiler feedwater. The resulting oxygen level is monitored for control purposes.
SCOPE
1.1 This test method covers the rapid determination of low-level (  
1.2 This test method may be applicable to electronic-grade, pharmaceutical-grade, and other high-purity waters, although these were not addressed in the collaborative study.  
1.3 It is the user's responsibility to ensure the validity of this test method for waters of untested matrices.  
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-2015
• ICS: 13.060.50 - Examination of water for chemical substances
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D5543 − 15
Standard Test Method for
1
Low-Level Dissolved Oxygen in Water
This standard is issued under the fixed designation D5543; 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 rapid determination of 3.1 Definitions—For definitions of terms used in this test
low-level (<100 µg/L) dissolved oxygen in thermal-cycle method, refer to Terminology D1129.
steamcondensate,deaeratedboilerfeedwater,boilerwater,and
4. Summary of Test Method
deaerated deionized water. Color comparators allow the esti-
mation of concentrations ranging from 0 to 100 µg/L (ppb)
4.1 The tip of a partially evacuated sealed ampoule is
oxygen.
broken while submerged in a flowing water sample. The
sample is drawn into the ampoule where it reacts instanta-
1.2 This test method may be applicable to electronic-grade,
neously with the oxygen-sensitive indicator (leuco form of
pharmaceutical-grade, and other high-purity waters, although
RhodazineD)toproduceareddishvioletcolorwhoseintensity
these were not addressed in the collaborative study.
3
is proportional to the concentration of dissolved oxygen.
1.3 Itistheuser’sresponsibilitytoensurethevalidityofthis
test method for waters of untested matrices.
5. Significance and Use
1.4 The values stated in SI units are to be regarded as
5.1 Dissolved oxygen is detrimental in certain boiler and
standard. No other units of measurement are included in this
steam cycles because it may accelerate corrosion. Concentra-
standard.
tions above 10 µg/L are unacceptable in many high-pressure
boiler systems. The efficiency of dissolved oxygen removal
1.5 This standard does not purport to address all of the
from boiler feedwater by chemical or mechanical means, or
safety concerns, if any, associated with its use. It is the
both, is determined by measuring the concentration before and
responsibility of the user of this standard to establish appro-
after the process. The measurement is also made to check for
priate safety and health practices and determine the applica-
air leakage into the boiler system.
bility of regulatory limitations prior to use.
5.2 The oxygen treatment method for boiler corrosion
2. Referenced Documents
reduction requires injection of oxygen into the boiler feedwa-
2
ter. The resulting oxygen level is monitored for control
2.1 ASTM Standards:
purposes.
D1066 Practice for Sampling Steam
D1129 Terminology Relating to Water
6. Interferences
D1193 Specification for Reagent Water
6.1 Color, turbidity, and oxidizing impurities interfere in
D2777 Practice for Determination of Precision and Bias of
this test method to yield high results. If the sample is colored
Applicable Test Methods of Committee D19 on Water
or turbid or contains oxidizing impurities, the amount of
D3370 Practices for Sampling Water from Closed Conduits
interference that may be contributed by such effects must be
D5463 Guide for Use of Test Kits to Measure Inorganic
determined independently prior to using this test method.
Constituents in Water
6.2 Easily reduced metal ions may interfere in this test
method to cause high results. For example, 100 µg/L (ppb)
+2
1
Cu may appear as 5 µg/L (ppb) dissolved oxygen, and 100
These test methods are under the jurisdiction of ASTM Committee D19 on
+3
Water and are the direct responsibility of Subcommittee D19.03 on Sampling Water
µg/L Fe may appear as 7 µg/L dissolved oxygen. However,
and Water-Formed Deposits, Analysis of Water for Power Generation and Process +2 +3
less than 50 µg/L Cu or Fe cause less than 1-µg/L
Use, On-Line Water Analysis, and Surveillance of Water.
interference.
Current edition approved Feb. 1, 2015. Published May 2015. Originally
approved in 1994. Last previous edition approved in 2009 as D5543 – 09. DOI:
10.1520/D5543-15.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Spokes, G. N., Dissolved Oxygen in Water Measurement and Standardization,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM EPRI PWR Plant Chemists’ Meeting, San Diego, CA, Nov. 17–20, 1992. Copies
Standards volume information, refer to the standard’s Document Summary page on obtainable from CHEMetrics Inc., 4295 Catlett Rd., Midland, VA 22728, https://
the ASTM website. www.chemetrics.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D5543 − 15
6.3 Hydrogen peroxide alone in concentrations up to 200
µg/L does not affect the measurement of 1.4 µg/L of
...

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: D5543 − 09 D5543 − 15
Standard Test Method for
1
Low-Level Dissolved Oxygen in Water
This standard is issued under the fixed designation D5543; 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 low-level (<100μ g/L) dissolved oxygen in thermal-cycle steam condensate,
deaerated boiler feedwater, boiler water, and deaerated deionized water. The following test method is included:
Range, μg/L Sections
Color Comparator Test 0 to 100 8 to 17
Method Using Self-Filling Glass
Ampoules
1.2 This test method may be applicable to electronic-grade, pharmaceutical-grade, and other high-purity waters, although these
were not addressed in the collaborative study.
1.3 This test method is a colorimetric procedure applicable to dissolved oxygen in water in the range from 0 to 100 μg/L.
1.4 It is the user’s responsibility to ensure the validity of these test methods for waters of untested matrices.
1.5 The values stated in SI units are to be regarded as the 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:
D1066 Practice for Sampling Steam
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 these test methods, refer to Terminology D1129.
4. Significance and Use
4.1 Dissolved oxygen is detrimental in certain boiler and steam cycles because it may accelerate corrosion. Concentrations
above 10 μg/L are unacceptable in many high-pressure boiler systems. The efficiency of dissolved oxygen removal from boiler
feedwater by chemical or mechanical means, or both, is determined by measuring the concentration before and after the process.
The measurement is also made to check for air leakage into the boiler system.
4.2 The oxygen treatment method for boiler corrosion reduction requires injection of oxygen into the boiler feedwater. The
resulting oxygen level is monitored for control purposes.
5. Reagents
5.1 This test method does not require the preparation of any reagents. All the necessary analytical reagents are provided by the
manufacturer in sealed ampoules.
1
These test methods are under the jurisdiction of ASTM 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 Oct. 1, 2009Feb. 1, 2015. Published October 2009May 2015. Originally approved in 1994. Last previous edition approved in 20052009 as
D5543 – 94D5543 – 09. (2005). DOI: 10.1520/D5543-09.10.1520/D5543-15.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D5543 − 15
5.2 Purity of Water—Reference to water shall mean water that meets or exceeds the quantitative specifications for Type II
reagent water of Specification D1193, Section 1.1.
6. Precautions
6.1 Users must exercise caution by using finger cots, in accordance with the manufacturer’s instructions, when handling the
mixing of sample and reagent in the glass ampoules.
7. Sampling
7.1 Sampling is the most critical part of any dissolved oxygen test. The sample stream must be completely leak-free, since even
the smallest leak can elevate the oxygen level in the sample and cause large errors in the results. New or intermittently used
sampling systems must be purged for a minimum of 4 h. Sample streams that are used routinely may require only a few minutes
of purging.
7.2 Collect the s
...