ASTM D 1607 : 2026

1.1This test method2 covers the manual determination of nitrogen dioxide (NO₂) in the atmosphere in the range from 4 μg/m³ to 10 000 μg/m³ (0.002 ppm(v) to 5 ppm(v)) when sampling is conducted in fritted-tip bubblers.

1.2For concentrations of NO₂ in excess of 10 mg/m³ (5 ppm(v)), as occur in industrial atmospheres, gas burner stacks, or automotive exhaust, or for samples relatively high in sulfur dioxide content, other methods should be applied. See for example Test Method D1608.

1.3The maximum sampling period is 60 min at a flow rate of 0.4 L/min.

1.4The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

1.5The thermometers referenced in this test method are described in Specification E1. As appropriate, for low-hazard precision non-mercury alternatives to E1 thermometers, see Specification E2251.

1.6Warning—Mercury has been designated by EPA and many state agencies as a hazardous material that can cause central nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for details and EPA’s website, http://www.epa.gov/mercury/faq.htm, for additional information. Users should be aware that selling mercury and/or mercury containing products into your state may be prohibited by state law.

1.7This 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 also 7.2.2 for other precautions.

1.8This 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.