Astm D 3824 – 95 (Reapproved 2000) pdf free download

Standard Test Methods for
Continuous Measurement of Oxides of Nitrogen in the
Ambient or Workplace Atmosphere by the
Chemiluminescent Method1

This standard is issued under the fixed designation D 3824; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. 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
(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) = NOx 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 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.

2. Referenced Documents

2.1 ASTM Standards:
D 1356 Terminology Relating to Sampling and Analysis of
D 1357 Practice for Planning the Sampling of the Ambient
D 1914 Practice for Conversion Units and Factors Relating
to Sampling and Analysis of Atmospheres2
D 3195 Practice for Rotameter Calibration2
D 3249 Practice for General Ambient Air Analyzer Procedures2
D 3609 Practice

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