Spectrophotometric determination of germanium(IV) using o-hydroxyhydroquinonephthalein and cetylpyridinium chloride.
- 1 January 1984
- journal article
- Published by Japan Society for Analytical Chemistry in BUNSEKI KAGAKU
- Vol. 33 (5) , E163-E166
- https://doi.org/10.2116/bunsekikagaku.33.5_e163
Abstract
The rapid, simple, and sensitive spectrophotometric determination of Ge(IV) with ο-hydroxyhydroquinonephthalein(Qn.Ph.) in the presence of cetylpyridinium chloride(CPC) was studied in the con centration of 0 - 5.0 μg Ge(IV) / 10 ml. The Sandell sensitivity was 0.00042 μg cm-2 at 505 nm. The molar absorption coefficient of the complex was 1.7 × 105 dm3 mol-1 cm-1. The coexistence of Fe(III) could be tolerated up to about 400-fold excess over Ge(IV) without masking agents, and the interference of large amounts of various metal ions could be overcome by addition of EDTA or sodium fluoride solution.Keywords
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