1.1 These test methods cover the chemical analysis of aluminum and aluminum-base alloys having compositions within the following limits: 1.2 The analytical procedures appear in the following order: 1.3 The values stated in SI units are to be regarded as the standard. 1.4 This standard does not purport to address all of the safety problems, 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. Specific hazard statements are given throughout these test methods.