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Significance and Use
5.1 The reactivity and instability of O3 precludes the storage of O3 concentration standards for any practical length of time, and precludes direct certification of O3 concentrations as SRM's. Moreover, there is no available SRM that can be readily and directly adapted to the generation of O3 standards analogous to permeation devices and standard gas cylinders for sulfur dioxide and nitrogen oxides. Dynamic generation of O3 concentrations is relatively easy with a source of ultraviolet (UV) radiation. However, accurately certifying an O3 concentration as a primary standard requires assay of the concentration by a comprehensively specified analytical procedure, which must be performed every time a standard is needed.
5.2 The primary UV standard photometers, which are usually used at a fixed location under controlled conditions, are used to certify transfer standards that are then transported to the field sites where the ambient ozone monitors are being used. See Practice .
5.3 The advantages of this procedure are:
5.3.1 All O3 monitors in a given network or region may be traced to a single primary standard.
5.3.2 The primary standard is used at only one location, under controlled conditions.
5.3.3 Transfer standards are more rugged and more easily portable than primary standards.
5.3.4 Transfer standards may be used to intercompare various primary standards.
1.1 These practices describe means for calibrating ambient, workplace or indoor ozone monitors, using transfer standards.
1.2 These practices describe five types of transfer standards:
Practice A—Analytical instruments,
Practice B—Boric acid potassium iodide (BAKI) manual analytical procedure,
Practice C—Gas phase titration with excess nitric oxide,
Practice D—Gas phase titration with excess ozone, and
Practice E—Ozone generator device.
1.3 These practices describe procedures to establish the authority of transfer standards: qualification, certification, and periodic recertification.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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. See Section for specific precautionary statements.
1.6 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1071 Test Methods for Volumetric Measurement of Gaseous Fuel Samples
D1193 Specification for Reagent Water
D1356 Terminology Relating to Sampling and Analysis of Atmospheres
D3195 Practice for Rotameter Calibration
D3249 Practice for General Ambient Air Analyzer Procedures
D3631 Test Methods for Measuring Surface Atmospheric Pressure
D3824 Test Methods for Continuous Measurement of Oxides of Nitrogen in the Ambient or Workplace Atmosphere by the Chemiluminescent Method
D4230 Test Method of Measuring Humidity with Cooled-Surface Condensation (Dew-Point) Hygrometer
D5110 Practice for Calibration of Ozone Monitors and Certification of Ozone Transfer Standards Using Ultraviolet Photometry
E591 Practice for Safety and Health Requirements Relating to Occupational Exposure to Ozone
Other Documents40 CFR Part 50 Environmental Protection Agency Regulations on Ambient Air Monitoring Reference Methods Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://www.access.gpo.gov.
ICS Number Code 13.040.01 (Air quality in general)
UNSPSC Code 77121501(Air quality management)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D5011-17, Standard Practices for Calibration of Ozone Monitors Using Transfer Standards, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top