Development of a sensitive, generic and easy to use organophosphate skin disclosure kit
| Autor: | Andreas Wosar, Timo Wille, Franz Worek, Horst Thiermann, Madlen Baumann |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Russian-VX 010501 environmental sciences Administration Cutaneous Toxicology 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Organophosphorus Compounds Malaoxon medicine Animals Humans Chemical Warfare Agents 0105 earth and related environmental sciences Nerve agent Detection limit Chromatography Paraoxon Color reaction Organophosphate Organothiophosphorus Compounds General Medicine 030104 developmental biology chemistry Acetylthiocholine Colorimetry Reagent Kits Diagnostic medicine.drug |
| Zdroj: | Toxicology Letters. 280:190-194 |
| ISSN: | 0378-4274 |
| Popis: | Various organophosphorus compounds (OP), primarily the nerve agent VX and other V-agents, are highly toxic to humans after skin exposure. Percutaneous exposure by such OP results in a delayed onset of toxic signs which enables the initiation of specific countermeasures if contamination is detected rapidly. Presently available mobile detection systems can hardly detect skin exposure by low volatile OP. In order to fill this gap an OP skin disclosure kit was developed which should fulfill different requirements, i.e. a high sensitivity, coverage of human toxic OP, easy handling, rapid results, small dimension and weight. The kit includes a cotton swab to sample skin, human AChE as target and chemicals for a color reaction based on the Ellman assay which is recorded by visual inspection. OP is dissolved from the sampler in a test tube filled with phosphate buffer (0.1M, pH 7.4) and incubated with lyophilized human AChE for 1min. The reaction with acetylthiocholine and 5,5'-dithio-bis-2-nitrobenzoic acid (1min) results in a rich yellow color in the absence of OP and in contrast, in transparent or pale yellow buffer in the presence of OP. At the recommended conditions, the limit of detection is 100ng VX and Russian VX and 50ng Chinese VX on plain surface and 200ng VX on rat skin. With activated pesticides, paraoxon and malaoxon, a concentration of ∼10μg can be detected on plain surface. The ready-to-use kit has a weight of 16g and a size of 10×12×1cm. In the end, this kit has the potential to fill a major gap and to enable timely detection of OP skin exposure and initiation of life-saving countermeasures. |
| Databáze: | OpenAIRE |
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