Methodological information from the certification of CCRMP ores and concentrates

In the course of 90 certifications for 27 elements in 26 reference ores and concentrates, carried out by the Canadian Certified Reference Materials Project, much methodological information has been documented and is now made available to analysts for the selection of suitable methods for the analysis of specific materials. Information is presented for copper, gold, lead, silver, sodium, potassium, tin, tungsten, uranium and zinc. A relationship between the average coefficient of variation and element concentration makes it possible to make some generalizations about the precision to be expected for a given concentration of an element in ores and concentrates.