This certified reference material (CRM) is produced in accordance with ISO 17034 and characterized in accordance with ISO/IEC 17025. This CRM is traceable to SI unit kg and measured against primary material from a National Metrology Institute (NMI), e.g. NIST.

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Iron standard solution in nitric acid has been used as a calibration solution in the characterization of the thin-film nickel-iron catalyst for the electrochemical evolution of oxygen, using inductively coupled plasma optical emission spectroscopy (ICP-OES).

1 g/L Fe in 2% nitric acid, prepared with high purity Fe metal, HNO₃ and water

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TraceCERT is a registered trademark of Merck KGaA, Darmstadt, Germany