ASTM D3824-12

Standard Test Methods for Continuous Measurement of Oxides of Nitrogen in the Ambient or Workplace Atmosphere by the Chemiluminescent Method

ASTM International, 04/01/2012

Publisher: ASTM

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Published:01/04/2012

Pages:12

File Size:1 file , 170 KB

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1.1 These test methods cover procedures for the continuous determination of total nitrogen dioxide (NO₂) and nitric oxide (NO) as NO_x, 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/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 + NO₂) = NO_x	20 to 1000 (0.01 to 0.05)	1 to 50 (0.5 to 25)
NO₂	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.

ASTM D3824-12

Standard Test Methods for Continuous Measurement of Oxides of Nitrogen in the Ambient or Workplace Atmosphere by the Chemiluminescent Method

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