1.1 These practices described herein cover the preparation of RDF ash, fly ash, bottom ash, or slag for analyses of metals by atomic absorption spectroscopy or inductively coupled plasma spectroscopy, or both (see Appendix X1).

1.2 These practices may be applicable to any waste material from which a laboratory analysis sample can be prepared.

1.3 Three practices are described in this standard:

1.3.1 Practice A -Lithium tetraborate (Li B O ) fusion,

1.3.2 Practice B -Aqua regia dissolution, and

1.3.3 Practice C -Bomb, acid digestion method.

1.4 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 hazard statements, see Sections 4, 20.3, and 20.6.