ASTM D1253-14
Standard Test Method for Residual Chlorine in Water

Standard No.
ASTM D1253-14
Release Date
2014
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM D1253-14(2021)e1
Latest
ASTM D1253-14(2021)e1
Scope

5.1 Chlorine is used to destroy or deactivate a variety of unwanted chemicals and microorganisms in water and wastewater.

5.2 An uncontrolled excess of chlorine in water, whether free available or combined, can adversely affect the subsequent use of the water.

1.1 This test method covers the determination of residual chlorine in water by direct amperometric titration.

1.2 Within the constraints specified in Section 6, this test method is not subject to commonly encountered interferences and is applicable to most waters. Some waters, however, can exert an iodine demand, usually because of organic material, making less iodine available for measurement by this test method. Thus, it is possible to obtain falsely low chlorine readings, even though the test method is working properly, without the user's knowledge.

1.3 Precision data for this test method were obtained on estuary, inland main stem river, fresh lake, open ocean, and fresh cooling tower blowdown water. Bias data could not be determined because of the instability of solutions of chlorine in water. It is the user's responsibility to ensure the validity of the test method for untested types of water.

1.4 In the testing by which this standard was validated, the direct and back starch-iodide titrations and the amperometric back titration, formerly part of this standard, were found to be unworkable and were discontinued in 1986. Historical information is presented in Appendix X1.

Note 1—Orthotolidine test methods have been omitted because of poor precision and accuracy.

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.

ASTM D1253-14 Referenced Document

  • ASTM D1129 Standard Terminology Relating to Water
  • ASTM D1193 Standard Specification for Reagent Water
  • ASTM D2777 Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water
  • ASTM D3370 Standard Practices for Sampling Water from Closed Conduits
  • ASTM D5847 Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis

ASTM D1253-14 history

Standard Test Method for Residual Chlorine in Water


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