SPECTROPHOTOMETRIC DETERMINATION OF FERROUS IRON IN EIGHTEEN UNITED STATES GEOCHEMICAL REFERENCE STANDARDS |
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| Authors: | Charles B Bruce Jr Nathan W Bower |
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| Institution: | Chemistry Department, Colorado College, Colorado Springs, CO 80903 USA |
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| Abstract: | Iron (II) oxide in 50 mg samples of silicate rocks, deposits, and soils is measured after digestion with HF and HCl in the presence of ICl. The iodine produced is measured spectrophotometrically. Results are presented for the eighteen available USGS geochemical reference standards including the GXR series. |
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