Determination of total iron in standard rocks by spectrophotometric titration with EDTA |
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Authors: | Harju L Huldén S G |
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Institution: | Department of Analytical Chemistry, Abo Akademi, Abo, Finland. |
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Abstract: | A method for the determination of total iron in silicate rocks is described. It is based on spectrophotometric titration of iron(III) with EDTA after decomposition in a PTFE bomb. No prior separation of interfering elements is needed. The method was tested by analysis of the U.S. Geological Survey reference rocks G-2, AGV-1, GSP-1, BCR-1 and PCC-1. The same sample solutions were also analysed by atomic-absorption spectrophotometry. The agreement with published and recommended values was good. |
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