ASTM D7399-08 PDF

1.1 This test method uses an infrared approach for determining the presence of polypropylene (PP) physically mixed in with low density polyethylene - usually for recycling purposes.

Note 1 - Quantitative determinations require several standard mixtures in the concentration range of interest and well defined baseline anchoring points.

1.2 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.

Note 2 - There is no known ISO equivalent to this standard.