Abstract
The description, sample preparation and evaluation of the data from an interlaboratory comparison study of a blast-furance slag reference material from Argentine is presented. The evaluation compared the mean, the geometric mean, the median, the Gastwirth median and dominant cluster mode parameters for assigning consensus values. The median values were: SiO2: 37.30%, Al2O3: 11.21%, FeO(T): 0.48%, MnO: 0.91%, MgO: 3.97%, CaO: 43.40%, Na2O: 0.39%, K2O: 0.84%, TiO2: 0.46%, and sulfur: 0.93%. The following other statistical parameters were also given for each constituent: the number of values, the range of values, the 95% confidence limits for the median, the 95% confidence limits of the mean, the variance, the standard deviation, the coefficient of variation, the standard error of the mean, the standard error of the standard deviation, the coefficient of skewness and the coefficient of kurtosis. Finally, frequency distribution diagrams of values discriminating the different analytical techniques employed are presented and discussed.
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