ASTM E70-19
Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
- Standard No.
- ASTM E70-19
- Release Date
- 2019
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM E70-24
- Latest
- ASTM E70-24
- Scope
- 1.1 This test method specifies the apparatus and procedures for the electrometric measurement of pH values of aqueous solutions with the glass electrode. It does not deal with the manner in which the solutions are prepared. pH measurements of good precision can be made in aqueous solutions containing high concentrations of electrolytes or water-soluble organic compounds, or both. It should be understood, however, that pH measurements in such solutions are only a semiquantitative indication of hydrogen ion concentration or activity. The measured pH will yield an accurate result for these quantities only when the composition of the medium matches approximately that of the standard reference solutions. In general, this test method will not give an accurate measure of hydrogen ion activity unless the pH lies between 2 and 12 and the concentration of neither electrolytes nor nonelectrolytes exceeds 0.1 mol/L (M). 1.2 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only. 1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29. 1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 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.
ASTM E70-19 Referenced Document
- ASTM D1193 Standard Specification for Reagent Water
- ASTM D1293 Standard Test Methods for pH of Water
- ASTM D5128 Standard Test Method for On-Line pH Measurement of Water of Low Conductivity
- ASTM D5464 Standard Test Methods for pH Measurement of Water of Low Conductivity
- ASTM D6569 Standard Test Method for On-Line Measurement of pH*， 2023-04-01 Update
- ASTM D6809 Standard Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials*， 2020-10-01 Update
- ASTM E180 Standard Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
- ASTM E1910/E1910M Standard Test Method for Agricultural pH Control Agents, Measurement of pH Change and Buffering Capacity*， 2021-04-01 Update
- ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
- ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E70-19 history
- 2024 ASTM E70-24 Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
- 2019 ASTM E70-19 Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
- 2007 ASTM E70-07(2015) Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
- 2007 ASTM E70-07 Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
- 1997 ASTM E70-97(2002) Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
- 1997 ASTM E70-97 Standard Test Method for pH of Aqueous Solutions With the Glass Electrode
