1.1 This test method covers the determination of total mercury in natural gas streams down to 0.001 ug/m³. It includes procedures to both obtaining a representative sample and the atomic fluorescence detection of the analyte. This procedure can be applied for both organic and inorganic mercury compounds.

1.2 Both, inch-pound and SI (metric) units of measurement are used throughout this standard.

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.