ASTM International - ASTM D3824-12
Standard Test Methods for Continuous Measurement of Oxides of Nitrogen in the Ambient or Workplace Atmosphere by the Chemiluminescent Method
| Organization: | ASTM International |
| Publication Date: | 1 April 2012 |
| Status: | inactive |
| Page Count: | 12 |
| ICS Code (Workplace atmospheres): | 13.040.30 |
significance And Use:
Most oxides of nitrogen are formed during high-temperature combustion. The Environmental Protection Agency (EPA) has set primary and secondary air quality standards for NO2 that are... View More
scope:
1.1 These test methods cover procedures for the continuous determination of total nitrogen dioxide (NO2) and nitric oxide (NO) as NOx, or nitric oxide (NO) alone or nitrogen dioxide (NO2) alone, in the ranges shown in the following table:
| Range of Concentration | ||
| Gas | Ambient Atmosphere | Workplace Atmosphere |
| μg/m
3 (ppm) (Note 1) | mg/m
3 (ppm) (Note 1) | |
| NO | 10 to 600 (0.01 to 0.5) | 0.6 to 30 (0.5 to 25) |
| (NO + NO
2) = NOx | 20 to 1000 (0.01 to 0.05) | 1 to 50 (0.5 to 25) |
| NO
2 | 20 to 1000 (0.01 to 0.5) | 1 to 50 (0.5 to 25) |
Note 1-Approximate range: 25°C and 101.3 kPa (1 atm).
1.2 The test methods are based on the chemiluminescent reaction between nitric oxide and ozone.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Section 9.
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