ASTM D 2010/D2010M : 1998 : R2017

1.1These test methods describe the evaluation of the total sulfation activity in the atmosphere. Because of its oxidizing power, lead dioxide (PbO₂) converts not only sulfur dioxide (SO₂), but other compounds, such as mercaptans and hydrogen sulfide, into sulfate. It fixes sulfur trioxide and sulfuric acid mist present in the atmosphere (see Note 1).

1.2Test Method A describes the use of a PbO₂ candle, and Test Method B describes that of a PbO₂ sulfation plate.2

1.3These test methods provide a weighted average effective SO₂ level for a 30-day interval.

1.4The results of these test methods correlate approximately with volumetric SO₂ concentrations, although the presence of dew or condensed moisture tends to enhance the capture of SO₂ onto the candle or plate.

1.5The values stated in SI units shall be regarded as the standard. The values given in brackets are for information only and may be approximate.

1.6This 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 8.

1.7This 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.