ASTM-D3824 › Historical Revision Information
Standard Test Methods for Continuous Measurement of Oxides of Nitrogen in the Ambient or Workplace Atmosphere by the Chemiluminescent Method
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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 |
| g/m3 (ppm) (Note 1) | mg/m3 (ppm) (NOTE 1) | |
| NO | 10 to 600 (0.01 to 0.5) | 0.6 to 30 (0.5 to 25) |
| (NO + NO | 20 to 1000 (0.01 to 0.05) | 1 to 50 (0.5 to 25) |
| NO | 20 to 1000 (0.01 to 0.5) | 1 to 50 (0.5 to 25) |
Note 1--Approximate range: 25oC and 101.3 kPa (1 atm).
1.2 The test methods are based on the chemiluminescent reaction between nitric oxide and ozone.
1.3This 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.
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 designed to protect the public health and the public welfare (40 CFR, Part 50).
Oxides of nitrogen are generated by many industrial processes that can result in employee exposures. These are regulated by the Occupational Safety and Health Administration (OSHA) which has promulgated exposure limits for the industrial working environment (29 CFR, Part 1910).
These methods have been found satisfactory for measuring oxides of nitrogen in the ambient and workplace atmosphere over the ranges shown in 1.1.
Keywords
ambient atmospheres; analysis; chemiluminescence reaction; nitric oxide; nitrogen dioxide; oxides of nitrogen; sampling; workplace atmospheres; ICS Number Code 13.040.30 (Workplace atmospheres)
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13.040.30 (Workplace atmospheres Air quality of surgery rooms, see 11.080.01)
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Document Number
ASTM-D3824-95(2005)
Revision Level
1995 R05 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
Dec. 1, 2005
Document Type
Test Method
Page Count
12 pages
Committee Number
D22.03