SPECTROPHOTOMETRIC DETERMI NATION OF OSMIUM (VIII) WITH 1-HYDROXY 2- PYRIDINE - THIONE (SODIUM SALT) AS A REAGENT
A spectrophotometric study of osmium (VIII) complex of 1-hydroxy 2- pyridine thione (HPT) is presented. A red-violet complex, 0 s (HPT) is formed in a highly acidic solution, and shows maximum absorbance at 500 nm with molar absorptivity of 5.12 x 101. mol . cm . Beer's law is obeyed in the ra...
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| Format: | Article |
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| Language: | English |
| Published: |
University of Tehran
1990-08-01
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| Series: | Journal of Sciences, Islamic Republic of Iran |
| Online Access: | https://jsciences.ut.ac.ir/article_31453_00551683e92324de5cad0465a3e6028d.pdf |
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| Summary: | A spectrophotometric study of osmium (VIII) complex of 1-hydroxy 2- pyridine
thione (HPT) is presented. A red-violet complex, 0 s (HPT) is formed in a highly
acidic solution, and shows maximum absorbance at 500 nm with molar absorptivity
of 5.12 x 101. mol . cm . Beer's law is obeyed in the range of 3-60 ppm. Sandel's
sensitivity of the method is 0.37 ?g.cm per0.001 ab sorbance unit. V (V), Pt (IV),
Cu (II), Sn (IV), Cr (VI), and NO . interference. To overcome the interference and
improve the selectivity, the 0 s (VIII) as OsO isextracted inCC1 and theextracted
0s (VIII) is converted to the complex and measured spectrophotometrically. This
method reduces the number of interferences to V(V), Pt (IV), and NO -. The
method offers the advantages of simplicity, speed and high precision. A spot test for
the detection of traces of osmium is also presented |
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| ISSN: | 1016-1104 2345-6914 |