Effective UV photolytic decomposition of organic compounds with a low-pressure mercury lamp as pretreatment for voltammetric analysis of trace metals
| Autor: | Toyomi Tomisaki, Tsutomu Koide, Kunihiko Yokoi, Constant M.G. van den Berg |
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| Rok vydání: | 1995 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution genetic structures Inorganic chemistry Analytical chemistry chemistry.chemical_element Biochemistry Organic compound eye diseases law.invention Mercury (element) Mercury-vapor lamp Light intensity Nickel chemistry law Oxidizing agent Humic acid sense organs |
| Zdroj: | Fresenius' Journal of Analytical Chemistry. 352:547-549 |
| ISSN: | 1432-1130 0937-0633 |
| Popis: | The effectivity of UV irradiation with low and high pressure mercury (L-Hg and H-Hg) lamps on the decomposition of organic compounds in aqueous solutions, as pretreatment for the voltammetric determination of trace metals, is compared. The photolytic decomposition with the L-Hg lamp was much faster than with the H-Hg lamp. The higher efficiency of the L-Hg lamp is caused by its greater light intensity at short wavelengths. Interferences of organic compounds on the voltammetric determination of nickel and indium were eliminated successfully by ∼90 min irradiation with the L-Hg lamp. Humic acid and organic interference with the voltammetric determination of nickel in natural river water were successfully eliminated. The decomposition using the L-Hg lamp can be carried out without added oxidizing reagents and at room temperature, thus eliminating loss of water samples by evaporation at higher temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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