Simultaneous determination of palladium and platinum as dithizonates by fifth-derivative spectrophotometry
| Autor: | Zygmunt Marczenko, Stanisław Kuś |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
Accuracy and precision
medicine.diagnostic_test Chemistry Analytical chemistry chemistry.chemical_element Derivative Biochemistry Analytical Chemistry Metal chemistry.chemical_compound Liquid–liquid extraction visual_art Spectrophotometry Electrochemistry visual_art.visual_art_medium medicine Environmental Chemistry Dithizone Platinum Spectroscopy Palladium |
| Zdroj: | The Analyst. 112:1503 |
| ISSN: | 1364-5528 0003-2654 |
| DOI: | 10.1039/an9871201503 |
| Popis: | A derivative spectrophotometric method, based on digitised fifth-derivative absorption spectra, has been developed for the simultaneous determination of microgram amounts of palladium and platinum, extracted with dithizone in carbon tetrachloride from iodide medium. Derivative spectra of the lower orders only allow the determination of one of the metals in the presence of the other. Two measurement techniques (peak-to-peak and zero-crossing methods) have been investigated. The second method gave better results for the determination of small amounts of one metal in the presence of an excess of the other. Using the proposed method, palladium (2–20 µg) and platinum (2–20 µg) in different ratios have been determined simultaneously with good precision and accuracy. The precision of the fifth-derivative spectrophotometric method is comparable to the precision obtained in normal spectrophotometry. |
| Databáze: | OpenAIRE |
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