Spectrophotometric determination of traces of ruthenium with o-tolidine
✍ Scribed by Raúl S. De Pablo
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 233 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
o-Tolidine is known to react with free chlorine, gold(IXI), osmium tetroxide, ruthenium salts, tungstates, etc. la2 but it has not been applied to the determination ofruthenium via its reaction with rhthenium tetroxide. This procedure is less sensitive than the catalytic cerium-arsenic method 3, but is more sensitive than any of the following methods: thiourea, diphenylthiourea, dithiooxamide, diphenylthiosemicarbazide, o-phenanthroline, p-nitrosodimethylaniline3.
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A method for the determination of sulphite is based on the addition reaction of sulphite with Brilliant Green at pH 7 and 25 o C. The decrease in absorbance of Brilliant Green (X,, = 615 nm) over a fixed time is proportional to the concentration of sulphite over the range of 10-1200 ng ml-'. The lim