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Indirect Extraction-Spectrophotometric Determination of Chromium
Telepčáková, M., Andruch, V. and Balogh, I. S. Indirect Extraction-Spectrophotometric Determination of Chromium Chemical Papers, Vol.59, No. 2, 2005, 109-112
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Attached Files |
| Name |
Description |
MIMEType |
Size |
Downloads |
n592a109.pdf
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592a109.pdf |
application/pdf |
225.66KB |
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| Author(s) |
Telepčáková, M.
Andruch, V.
Balogh, I. S.
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| Title |
Indirect Extraction-Spectrophotometric Determination of Chromium
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| Journal name |
Chemical Papers
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| Publication date |
2005
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| Year available |
2005
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| Volume number |
59
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| Issue number |
2
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| ISSN |
0366-6352
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| Start page |
109
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| End page |
112
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2005
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| Language |
english
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| Subject |
250000 Chemical Sciences
250100 Physical Chemistry (incl. Structural)
250400 Analytical Chemistry
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| Abstract/Summary |
An analytical procedure for the indirect spectropimtometric determination of trace amounts of hexavalent chromium in a model sample of water has been developed. Chromium in its hexavalent state is reduced to its trivalent state in the presence of an excess of iodide ion in an acidic medium. The liberated triiodide ion forms with a cationic dye ion associate which is extracted into toluene. The extraction of chromium(Vl) is the highest from a 0.08 mol dm-3 sulfuric acid medium. The intensively coloured complex absorbs at λ = 430 nm. The system obeys Beer's law in the concentration range up to 2 mg dm-3. Corresponding limit of detection (based on 3o) is 0.234 mg dm-3 Cr(VI).
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