CERTIFICATE OF ANALYSIS ERM®- EC681k

仪器资料 · 发表于 2017-9-1 07:53:17

1) Unweighted mean value of the means of 5-14 accepted sets of data, each set being obtained in a differentlaboratory and/or with a different method of determination. The value is traceable to the International System of Units

(SI).

2) The certified uncertainty is the expanded uncertainty estimated in accordance with the Guide to the Expression ofUncertainty in Measurement (GUM) with a coverage factor k = 2.78 for Cr and k = 2 for all other elements,corresponding to a level of confidence of about95 %.

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