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ASTM International - ASTM D5464-07

Standard Test Method for pH Measurement of Water of Low Conductivity

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Organization: ASTM International
Publication Date: 1 August 2007
Status: inactive
Page Count: 10
ICS Code (Examination of water for chemical substances): 13.060.50
significance And Use:

pH measurement of low conductivity water is frequently applied to power plant water and condensed steam samples for corrosion and scale prevention. It is sometimes used in pure water treatment... View More

scope:

1.1 This test method is applicable to determine the pH of water samples with a conductivity of 2 to 100 µ S/cm over the pH range of 3 to 11. pH measurements of water of low conductivity are problematic. Specifically, this test method avoids contamination of the sample with atmospheric gases and prevents volatile components of the sample from escaping. This test method provides for pH electrodes and apparatus that address additional considerations discussed in . This test method also minimizes problems associated with the sample's pH temperature coefficient when the operator uses this test method to calibrate an on-line pH monitor or controller (see Appendix X1).

1.2 This test method covers the measurement of pH in water of low conductivity with a lower limit of 2.0 µS/cm, utilizing a static grab-sample procedure where it is not practicable to take a real-time flowing sample.

Note 1

Test Method D 5128 for on-line measurement is preferred over this method whenever possible. Test Method D 5128 is not subject to the limited conductivity range, temperature interferences, potential KCl contamination, and time limitations found with this method.

1.3 For on-line measurements in water with conductivity of 100 µS/cm and higher, see Test Method D 6569.

1.4 For laboratory measurements in water with conductivity of 100 µS/cm and higher, see Test Method D 1193.

1.5 The values stated in SI units are to be regarded as standard.

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.

Document History

June 1, 2016
Standard Test Method for pH Measurement of Water of Low Conductivity
6.1 pH measurement of low conductivity water is frequently applied to power plant water and condensed steam samples for corrosion and scale prevention. It is sometimes used in pure water treatment...
May 1, 2011
Standard Test Method for pH Measurement of Water of Low Conductivity
1.1 This test method is applicable to determine the pH of water samples with a conductivity of 2 to 100 μS/cm over the pH range of 3 to 11. pH measurements of water of low conductivity are...
ASTM D5464-07
August 1, 2007
Standard Test Method for pH Measurement of Water of Low Conductivity
pH measurement of low conductivity water is frequently applied to power plant water and condensed steam samples for corrosion and scale prevention. It is sometimes used in pure water treatment...
January 1, 2001
Standard Test Methods for pH Measurement of Water of Low Conductivity
1.1 These test methods are applicable to determine the pH of water samples with a conductivity lower than 100 µ S/cm (see Annex A1 and Table A1.1 and Table A1.2 ) over the pH range of 3 to 11 (see...
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