1.1 This practice covers sampling and testing for distinguishing carbon black from other environmental particulates.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information.

1.3 This standard may involve hazardous materials, operations, and equipment. 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.

1.4 This practice requires some degree of expertise on the part of the microscopist. For this reason, the microscopist must have adequate training and substantial one-the-job experience in identifying the morphological parameters of carbon black.