Spectrophotometric determination of germanium based on its ternary complex with phenylfluorone and zephiramine
1986; Elsevier BV; Volume: 34; Issue: 1 Linguagem: Inglês
10.1016/0026-265x(86)90110-4
ISSN1095-9149
AutoresZygmunt Marczenko, Maria Krasiejko, A. Kłȩbek,
Tópico(s)Analytical Chemistry and Sensors
ResumoA sensitive Spectrophotometric method for the determination of germanium based on its ternary complex with phenylfluorone and zephiramine was developed. The complex forms in 0.3–1.5 M HCl medium. Maximum absorbance is obtained for the molar ratio of Ge:PF:zeph = 1:16:600. Molar absorptivity (ϵ) is 1.38 × 105 liters mol−1 cm−1 at λmax = 505 nm. Due to the limited selectivity of the method (Sn, Sb, Nb, Ta, Ti, V, Mo, ClO4−, SO42−, PO43−) before determining trace amounts of germanium, it should be separated, e.g., by extraction. Germanium in galman ore was determined with the developed method (about 1 × 10−3%). Attempts to achieve satisfactory analytical results failed in the presence of cetyltrimethylammonium ions or cetylpyridinium ions used as cationic surfactants.
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