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CSA Z223.23

Revision 81M, June 1981

Complete Document

Method for the Measurement of Ozone in Air

Includes all amendments and changes through Reaffirmation Notice , 1999

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Product Details:

  • Revision: Revision 81M, June 1981
  • Published Date: January 1999
  • Status: Not Active, See comments below
  • Document Language: English
  • Published By: CSA Group (CSA)
  • Page Count: 19
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This Standard applies to the continuous measurement of ozone in air.

This Standard sets forth the chemiluminescence method for the measurement of concentrations of ozone between 2 µg·m-3 and 10 mg·m-3 at 25°C and 101.3 kPa (approximately 0.001 ppm v/v and 5 ppm v/v).


(1) All concentrations referred to throughout this Standard are based on a temperature of 25OC and an atmospheric pressure of 101.3 kPa unless otherwise Sta ted.

(2) Two calibration procedures are described: the ultraviolet photometric method and the use of transfer standards.

Ultraviolet photometry is used in this Standard only for the primary calibration of ozone atmospheres. However, this Standard recognizes that, under many circumstances, ultraviolet photom etry can be used as an alternative ozone-monitoring method. A brief outline of this instrumental method and its limitations are given in Appendix A. However, this method shall first be shown to be equivalent to the chemiluminescence method in the area where it is intended to be used. 


(1) For additional information on equivalence testing, see Bibliography, Item 1.

(2) It is essential to differentiate between the use of an ultraviolet photometer as an ambient analyser and its use as a calibration photometer. An ultraviolet analyser cannot be considered to be self-calibrated and must always be calibrated with an independent calibration photometer or an acceptable transfer standard. An ultraviolet photometer used for calibration must be dedicated to such use and must be meticulously maintained