Certified Reference Materials of Copper, Lead and Zinc (Silver) Ore Rocks and Their Concentrates (GSO 1‐7)

Sulfide mineral certified reference materials GSO 1-7, recently prepared by the Institute of Geophysical and Geochemical Exploration (IGGE), were analysed by twelve laboratories. Various reliable analytical methods based on different principles were adopted and classical chemical methods were taken as the primary analytical methods, by which 5729 determinations were carried out, 1425 average data were obtained, and twenty one to twenty seven elements and components were certified. Les sulfures, materiaux de Reference Certifies GSO 1-7, prepares recemment par l'Institut d'Exploration Geophysique et Geochimique (IGGE) ont ete analyses par douze laboratoires differents. Des methodes tres variees mais toutes fiables, basees sur des principes tres differents ont ete adoptees et les methodes chimiques classiques ont ete prises comme methodes analytiques primaires. Au final, 5729 determinations ont ete faites, 1425 valeurs moyennes ont ete obtenues, permettant de certifier entre vingt et un et vingt sept elements ou composants.