For the two IWG reference samples, Albite AL‐I and Iron Formation Sample IF‐G, new data on trace elements and those published in the 1984 compilation report are presented along with a brief description of their preparation in large quantities, 169 kg for AL‐I and 760 kg for IF‐G. Recommended working values with confidence limits have been assigned for over fifty major, minor and trace elements. A distinguishing feature of both the samples is their low abundances of trace e