| Autor: |
Rübel, A., Bierl, Reinhard |
| Zdroj: |
Fresenius' Journal of Analytical Chemistry; Aug1999, Vol. 364 Issue 7, p648-650, 3p |
| Abstrakt: |
Parameters affecting the extraction efficiency of various pesticides from a native contaminated soil sample (Corg = 4.4%) using an enhanced solvent extraction (ESE) technique were investigated. The defined settings of temperature (50/150 °C), pressure (180/240 MPa), static and dynamic extraction time (5/15 min and 0/5 min, respectively) yielded results which did not differ significantly (RSD = 5.9–11.8%). In comparison to a classical shake-out extraction method the yielded quantities were on average 14% higher using ESE. The established method achieved a high precision (RSD = 2.8–9.1%) for the pesticides extracted from native contaminated soil samples. A significant influence of the sample matrix on accuracy was not observed. The RSDs of thirteen pesticides extracted from spiked sea sand varied in a similar range from 1.7 to 9.8% and the recoveries were between 83 and 112%. The method has been applied to soil samples from vineyards routinely. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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