ASTM D1293-99

Standard Test Methods for pH of Water

SCOPE
1.1 These test methods cover the determination of pH by electrometric measurement using the glass electrode as the sensor. Two test methods are given as follows: SectionsTest Method A-Precise Laboratory Measurement 8 to 15Test Method B-Routine or Continuous Measurement 16 to 24
1.2 Test Method A covers the precise measurement of pH in water utilizing at least two of seven standard reference buffer solutions for instrument standardization.
1.3 Test Method B covers the routine measurement of pH in water and is especially useful for continuous monitoring. Two buffers are used to standardize the instrument under controlled parameters, but the conditions are somewhat less restrictive than those in Test Method A.
1.4 Both test methods are based on the pH scale established by NIST (formerly NBS) Standard Reference Materials.
1.5 Neither test method is considered to be adequate for measurement of pH in water whose conductivity is less than about 5 S/cm. Refer to Test Methods D 5128 and D 5464.
1.6 Precision and bias data were obtained using buffer solutions only. It is the user's responsibility to assure the validity of these test methods for untested types of water.
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.
1.7 This test method covers the precise measurement of pH in water under strictly controlled laboratory conditions.
1.8 This test method is used for the routine measurement of pH in the laboratory and the measurement of pH under various process conditions.

General Information

• Status: Historical
• Publication Date: 09-Dec-1999
• 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

Relations

• Replaced By: ASTM D1293-99(2005) - Standard Test Methods for pH of Water
• Effective Date: 01-Jan-2005
• Referred By: ASTM D5338-15(2021) - Standard Test Method for Determining Aerobic Biodegradation of Plastic Materials Under Controlled Composting Conditions, Incorporating Thermophilic Temperatures
• Effective Date: 10-Dec-1999
• Referred By: ASTM D7475-20 - Standard Test Method for Determining the Aerobic Degradation and Anaerobic Biodegradation of Plastic Materials under Accelerated Bioreactor Landfill Conditions
• Effective Date: 10-Dec-1999
• Referred By: ASTM G202-12(2020) - Standard Test Method for Using Atmospheric Pressure Rotating Cage
• Effective Date: 10-Dec-1999
• Referred By: ASTM C1926-23 - Standard Test Method for Measurement of Glass Dissolution Rate Using Stirred Dilute Reactor Conditions on Monolithic Samples
• Effective Date: 10-Dec-1999
• Referred By: ASTM D887-13(2022) - Standard Practices for Sampling Water-Formed Deposits
• Effective Date: 10-Dec-1999
• Referred By: ASTM C1663-18 - Standard Test Method for Measuring Waste Glass or Glass Ceramic Durability by Vapor Hydration Test
• Effective Date: 10-Dec-1999
• Referred By: ASTM D3375-18 - Standard Test Method for Column Capacity of Particulate Mixed Bed Ion<brk/>Exchange Materials
• Effective Date: 10-Dec-1999
• Referred By: ASTM E70-19 - Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
• Effective Date: 10-Dec-1999
• Referred By: ASTM D6764-02(2019) - Standard Guide for Collection of Water Temperature, Dissolved-Oxygen Concentrations, Specific Electrical Conductance, and pH Data from Open Channels
• Effective Date: 10-Dec-1999
• Referred By: ASTM C1662-18 - Standard Practice for Measurement of the Glass Dissolution Rate Using the Single-Pass Flow-Through Test Method
• Effective Date: 10-Dec-1999
• Referred By: ASTM E1943-98(2015) - Standard Guide for Remediation of Ground Water by Natural Attenuation at Petroleum Release Sites
• Effective Date: 10-Dec-1999
• Referred By: ASTM D5864-18 - Standard Test Method for Determining Aerobic Aquatic Biodegradation of Lubricants or Their Components
• Effective Date: 10-Dec-1999
• Referred By: ASTM C1285-21 - Standard Test Methods for Determining Chemical Durability of Nuclear, Hazardous, and Mixed Waste Glasses and Multiphase Glass Ceramics: The Product Consistency Test (PCT)
• Effective Date: 10-Dec-1999
• Referred By: ASTM D2187-17 - Standard Test Methods and Practices for Evaluating Physical and Chemical Properties of Particulate Ion-Exchange Resins
• Effective Date: 10-Dec-1999

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 lastest information
ASTM-D1293
ADOPTION NOTICE
ASTM-D1293, "WATER, PH OF", was adopted on 26-OCT-84 for use by
the Department of Defense (DoD). Proposed changes by DoD
activities must be submitted to the DoD Adopting Activity:
Commander, Naval Sea Systems Command, SEA 03R42, 2531 Jefferson
Davis Highway, Arlington, VA 22242-5160. Copies of this
document may be purchased from the American Society for Testing
and Materials 100 Barr Harbor Drive West Conshohocken,
Pennsylvania, United States, 19428-2959. http://www.astm.org/____________________
Custodians: Adopting Activity:
Army - EA Navy - SH
Navy - SH
Air Force - 68
Reviewer Activities:
Army - CR4, GL, MD
Navy - AS, OS
DLA - GS, PS
FSC 6810
Approved for public release; distribution
DISTRIBUTION STATEMENT A:
is unlimited.
Copyright ASTM International
Provided by IHS under license with ASTM Licensee=ASTM/5955840001, User=Pace, John
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Designation:D 1293–99
Standard Test Methods for
1
pH of Water
This standard is issued under the fixed designation D 1293; 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.
3
1. Scope D 1193 Specification for Reagent Water
D 2777 Practice for Determination of Precision and Bias of
1.1 These test methods cover the determination of pH by
3
Applicable Methods of Committee D-19 on Water
electrometric measurement using the glass electrode as the
D 3370 Practices for Sampling Water from Closed Con-
sensor. Two test methods are given as follows:
3
duits
Sections
D5128 TestMethodforOn-LinepHMeasurementofWater
Test MethodA—Precise Laboratory Measurement 8 to 15
3
Test Method B—Routine or Continuous Measurement 16 to 24
of Low Conductivity
D5464 TestMethodsforpHMeasurementofWaterofLow
1.2 TestMethodAcoverstheprecisemeasurementofpHin
3
Conductivity
water utilizing at least two of seven standard reference buffer
E 70 Test Method for pH of Aqueous Solutions with the
solutions for instrument standardization.
4
Glass Electrode
1.3 TestMethodBcoverstheroutinemeasurementofpHin
water and is especially useful for continuous monitoring. Two
3. Terminology
buffers are used to standardize the instrument under controlled
3.1 Definitions—For definitions of terms used in these test
parameters, but the conditions are somewhat less restrictive
methods, refer to Terminology D1129.
than those in Test Method A.
3.2 Definitions of Terms Specific to This Standard:
1.4 Both test methods are based on the pH scale established
2
3.2.1 pH, n—the pH of an aqueous solution is derived from
by NIST (formerly NBS) Standard Reference Materials.
E, the electromotive force (emf) of the cell
1.5 Neither test method is considered to be adequate for
measurement of pH in water whose conductivity is less than glasselectrode|solution||referenceelectrode
about 5 µS/cm. Refer to Test Methods D5128 and D5464.
(where the double vertical line represents a liquid junction)
1.6 Precision and bias data were obtained using buffer
when the electrodes are immersed in the solution in the
solutions only. It is the user’s responsibility to assure the
diagrammed position, and E is the electromotive force ob-
s
validity of these test methods for untested types of water.
tained when the electrodes are immersed in a reference buffer
1.7 This standard does not purport to address all of the
solution.
safety concerns, if any, associated with its use. It is the
With the assigned pH of the reference buffer designated as
5
responsibility of the user of this standard to establish appro-
pH , and E and E expressed in volts is the following:
s s
priate safety and health practices and determine the applica-
~E2E!F
s
bility of regulatory limitations prior to use.
pH5pH 1
s
2.3026RT
2. Referenced Documents
where:
2.1 ASTM Standards:
F 5 Faraday,
3
D 1066 Practice for Sampling Steam R 5 gas constant, and
3
D 1067 Test Methods for Acidity or Alkalinity of Water T 5 absolute temperature, t (°C) + 273.15.
3
The reciprocal of F/2.3026 RT is known as the slope of the
D 1129 Terminology Relating to Water
D 1192 Specification for Equipment for Sampling Water electrode, and is the expected difference in observed voltage
3
fortwomeasurementsonepHunitapart.Valuesoftheslopeat
and Steam in Closed Conduits
various temperatures are given in Table 1.
1
These test methods are under the jurisdiction of ASTM Committee D-19 on
4. Summary of Test Method
Water
...