Authors: Jochen Vogl, Heinrich Kipphardt, Silke Richter, Wolfram Bremser, Maria del Rocio Arvizu Torres, Judith Velina Lara Manzano, Mirella Buzoianu, Sarah Hill, Panayot Petrov, Heidi Goenaga-Infante, Mike Sargent, Paola Fisicaro, Guillaume Labarraque, Tao Zhou, Gregory C. Turk, Michael R. Winchester, Tsutomu Miura, Brad Methven, Ralph E. Sturgeon, Reinhard Jährling, Olaf Rienitz, Michal Máriássy, Zuzana Hanková, Egor Sobina, A. Krylov, Yuri Kustikov, Vadim Vladimirovich Smirnov

Venue: Metrologia

Type: Publication

Abstract: For the first time, an international comparison was conducted on the determination of the purity of a high purity element. Participants were free to choose any analytical approach appropriate for their institute's applications and services. The material tested was a high purity zinc, which had earlier been assessed for homogeneity and previously used in CCQM-K72 for the determination of six defined metallic impurities. Either a direct metal assay of the Zn mass fraction was undertaken by EDTA titrimetry, or an indirect approach was used wherein... (read more)

DOI: 10.1088/1681-7575/aaa677