GEOPT - A PROFICIENCY TEST FOR GEOANALYSIS

GeoPT is a new proficiency test for silicate rock analysis. Participan ts' results are processed by the formation of a z-score, according to the Harmonised Protocol on Proficiency Testing, Two classes of perform ance criteria are available for participants to work to, In the second sound conducted in 1997, 44 analytes were given z-scores and 13 repor ted without z-scores, Of the results to which z-scores were assigned, 74.4% were classified as satisfactory.