1.1 This practice is suitable for testing the homogeneity of ametal lot or batch (L/B) in solid form by spark atomic emissionspectrometry (Spark-AES). It is compliant with ISO Guide35—Certification of Reference Materials: General and Statis-tical Principles. It is primarily intended for use in the devel-opment of reference materials but may be used in any otherapplication where a L/B is to be tested for homogeneity. It isdesigned to provide a combined study of within-unit andbetween-unit homogeneity of such a L/B.
