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SPECTROPHOTOMETRIC DETERMINATION OF FERROUS IRON IN EIGHTEEN UNITED STATES GEOCHEMICAL REFERENCE STANDARDS
Author(s) -
Bruce Charles B.,
Bower Nathan W.
Publication year - 1987
Publication title -
geostandards newsletter
Language(s) - English
Resource type - Journals
eISSN - 1751-908X
pISSN - 0150-5505
DOI - 10.1111/j.1751-908x.1987.tb00005.x
Subject(s) - ferrous , iodine , silicate , soil water , chemistry , oxide , environmental chemistry , mineralogy , environmental science , soil science , organic chemistry
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.