Optimised Ferrozine Micro‐Method for the Determination of Ferrous and Ferric Iron in Rocks and Minerals     

John Husler  Elizabeth D.A. Ferriss  Katheryn B. Helean  Charles R. Bryan  Patrick V. Brady 《Geostandards and Geoanalytical Research》2011,35(1):39-44

The ferrozine wet chemical method was optimised for the determination of the total iron content and speciation in small geological samples. The ferrozine micro‐method involves dissolution by a mixture of HF and H₂SO₄ followed by spectrophotometric analysis using the complexing agent ferrozine. The method was tested for twenty‐one replicates of eight rock RMs using test portions of 5–14 mg and containing 0.37–5.45 mg total Fe and more than 0.29 mg Fe(II). The optimised ferrozine method was accurate to within 0.23% m/m FeO and 0.34% m/m total Fe, which compares favourably to other wet chemical methods.  相似文献