Maria Lúcia Ribeiro

TL;DR: Results indicated that washing under the described conditions did not allow a complete removal of dicofol residues from orange peel, and the effect of a pilot washing system on dic ofol residues in oranges was investigated.

TL;DR: In this article, a rapid and economical method for the determination of deltamethrin in wheat, rice, peanuts and corn is described, based on simultaneous extraction and clean-up on a column packed with alumina and silica gel using n-hexane-ethyl ether (8:2, v/v).

TL;DR: In this paper, supercritical fluid extraction (SFE) methods were tested, by varying the following operational parameters: CO2 pressure, time and temperature of extraction, type and proportion of static modifier, and Hydromatrix®/sample rate into cell.

TL;DR: In this paper, samples of soil, water and sediment were collected and analyzed in order to evaluate chromium contamination due to deposition of tannery residues onto soils under different management regimes.

TL;DR: In this article, a simple and efficient method was described for the determination of fenpropathrin in oranges, pears, apples, and strawberries, based on the extraction of each homogenized fruit sample with hexane:acetone (1∶1, v/v) mixture, followed by a cleanup technique on a column packed with florisil, using a hexane-ethyl ether (7∶3, v)/v mixture, and gas chromatographic analysis with electron capture detection (ECD).