Rapid Assay for Polystyrene Surface Oxidation
| Autor: | William Hertl, Emmanuel C. Onyiriuka, M. Bryhan, L. S. Hersh |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
010401 analytical chemistry
Inorganic chemistry X-ray Analytical chemistry Azure A 01 natural sciences 0104 chemical sciences 010309 optics Absorbance chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy 0103 physical sciences Polystyrene Wetting Instrumentation Spectroscopy Corona discharge Visible spectrum |
| Zdroj: | Applied Spectroscopy. 47:1609-1611 |
| ISSN: | 1943-3530 0003-7028 |
| DOI: | 10.1366/0003702934334688 |
| Popis: | Polystyrene surfaces are often corona-discharge or plasma treated to oxidize the surface, which enhances the wettability. X-ray photoelectron spectroscopy (XPS), which requires time and an ultra-high vacuum, is generally used to measure this surface oxidation. A rapid, simple method for measuring polystyrene surface oxidation is described. The surface is soaked in a solution of Azure A dye, which adsorbs only to oxidized sites on the polystyrene. The excess dye is flushed away and the bound dye is desorbed with a detergent; an absorbance measurement at 635 nm is used to determine the quantity of desorbed dye. This value correlates with the polystyrene surface oxygen concentration and gives r2 = 0.93. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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