Diphenylamine traces in handswabs and clothing debris: clean-up and liquid chromatography with sequential oxidative and reductive electrochemical detection
| Autor: | J. B. F. Lloyd |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
Aniline Compounds
Chromatography Trace Amounts Chemistry fungi Diphenylamine Forensic Medicine Electrochemistry Chemical reaction Amperometry Clothing Analytical Chemistry chemistry.chemical_compound Adsorption Spectrophotometry Ultraviolet Ion-exchange resin Acetonitrile Oxidation-Reduction Chromatography High Pressure Liquid |
| Zdroj: | Analytical Chemistry. 59:1401-1404 |
| ISSN: | 1520-6882 0003-2700 |
| DOI: | 10.1021/ac00137a006 |
| Popis: | Because of its low basicity, diphenylamine (DPA) absorbed from acetonitrile onto a strongly acidic cation exchange resin is readily displaced by small amounts of water. Hence, microcolumns of the resin may be used in the selective recovery of DPA from clothing debris and from handswab extracts. The eluates are analyzed by high-performance liquid chromatography with oxidative detection at porous graphite electrodes, when DPA undergoes a four-electron oxidation, followed by reductive detection of the oxidation product at a pendent mercury drop electrode. Some examples are quoted of background amounts of DPA that overlap the published results of DPA transfer due to firearms discharge. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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