1.1 This test method covers the determination of the ash content of polybasic acids after a sample has been completely burned and ignited. This test method is particularly designed for low ash content (5 to 200 ppm).

1.2 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.