| Autor: |
Verweij A, Boter HL, Degenhardt CE |
| Jazyk: |
angličtina |
| Zdroj: |
Science (New York, N.Y.) [Science] 1979 May 11; Vol. 204 (4393), pp. 616-8. |
| DOI: |
10.1126/science.204.4393.616 |
| Abstrakt: |
The chemical analysis of the waste water from plants that manufacture chemicals is a nonintrusive method for confirming a suspected violation of the prohibition against the production of chemical warfare agents. The chemical structure of most nerve gases is related to that of methylphosphonic acid, whereas most organo-phosphorus pesticides have the phosphoric acid structure. On the basis of this characteristic difference, a procedure has been developed in which the presence of a nerve gas, its decomposition products, or its starting materials in waste water (Rhine River and Meuse River water) is reflected by the appearance of methylphosphonic acid as a breakdown product after hydrolysis. This acid is concentrated and converted into a volatile compound by methylation. After cleanup, the ester may be separated from related compounds by gas chromatography and is detected by means of a specific detector for phosphorus. The detection limit of nerve gases by this procedure is approximately 1 nanomole per liter of water. The scope and limitations of the method are discussed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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