ASTM D888-03

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AnAmerican National Standard
Designation:D 888–03
Standard Test Methods for
1
Dissolved Oxygen in Water
This standard is issued under the fixed designation D 888; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 3.2 Definitions of Terms Specific to This Standard:
3.2.1 amperometric systems, n—those instrumental probes
1.1 Thesetestmethodscoverthedeterminationofdissolved
that involve the generation of an electrical current from which
oxygen in water. Two test methods are given as follows:
the final measurement is derived.
Range, mg/L Sections
3.2.2 instrumental probes, n—devicesusedtopenetrateand
Test MethodA—Titrimetric Procedure–High Level >1.0 8 to 14
Test Method B—Instrumental Probe Procedure 0.05 to 20 15 to 23
examineasystemforthepurposeofrelayinginformationonits
properties or composition. The term probe is used in these test
1.2 The precision of Test MethodsAand B was carried out
methods to signify the entire sensor assembly, including
using a saturated sample of reagent water. It is the user’s
electrodes, electrolyte, membrane, materials of fabrications,
responsibility to ensure the validity of the test methods for
etc.
waters of untested matrices.
3.2.3 potentiometric systems, n—those instrumental probes
1.3 This standard does not purport to address all of the
inwhichanelectricalpotentialisgeneratedandfromwhichthe
safety concerns, if any, associated with its use. It is the
final measurement is derived.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Significance and Use
bility of regulatory limitations prior to use. For a specific
4.1 Dissolved oxygen is required for the survival and
precautionary statement, see Note 17.
growth of many aquatic organisms, including fish. The con-
2. Referenced Documents
centration of dissolved oxygen may also be associated with
corrosivity and photosynthetic activity.The absence of oxygen
2.1 ASTM Standards:
2
may permit anaerobic decay of organic matter and the produc-
D1066 Practice for Sampling Steam
2
tion of toxic and undesirable esthetic materials in the water.
D1129 Terminology Relating to Water
2
D1193 Specification for Reagent Water
5. Purity of Reagents
D2777 Practice for Determination of Precision and Bias of
2
5.1 Purity of Reagents—Reagent grade chemicals shall be
Applicable Methods of Committee D19 on Water
used in all tests. Unless otherwise indicated, it is intended that
D3370 Practices for Sampling Water from Closed Con-
2
all reagents shall conform to the specifications of the Commit-
duits
tee on Analytical Reagents of the American Chemical Soci-
D5847 Practice for Writing Quality Control Specifications
5
3
ety. Other grades may be used if it is first ascertained that the
for Standard Test Methods for Water Analysis
reagent is of sufficiently high purity to permit its use without
E200 Practice for Preparation, Standardization, and Stor-
lessening the accuracy of the determination.
age of Standard and Reagent Solutions for Chemical
4
5.1.1 Reagentgradechemicals,asdefinedinPracticeE200,
Analysis
shall be used unless otherwise indicated. It is intended that all
3. Terminology reagents conform to this standard.
5.2 Unless otherwise indicated, reference to water shall be
3.1 Definitions—For definitions of terms used in these test
understood to mean reagent water conforming to Specification
methods, refer to Terminology D1129.
D1193, Type I. Other reagent water types may be used
provided it is first ascertained that the water is of sufficiently
1
These test methods are under the jurisdiction of ASTM Committee D19 on
Water and are the direct responsibility of Subcommittee D19.05 on Inorganic
5
Constituents in Water. Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved June 10, 2003. Published July 2003. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
approved in 1946. Last previous edition approved in 1996 as D888–92 (1996). listed by the American Chemical Society, see Analar Standards for Laboratory
2
Annual Book of ASTM Standards, Vol 11.01. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
3
Annual Book of ASTM Standards, Vol 11.02. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
4
Annual Book of ASTM Standards, Vol 15.05. MD.
*A Summary of Changes section appears at the end of this standard.
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