A Multiresidue Method for the Analysis of Carbamate and Urea Pesticides from Soils by Microwave-Assisted Extraction and Liquid Chromatography with Photodiode Array Detection

Abstract

A multiresidue approach using microwave-assisted extraction and liquid chromatography with photodiode array detection was investigated for the determination of butylate, carbaryl, carbofuran, chlorpropham, ethiofencarb, linuron, metobromuron, and monolinuron in soils. The critical parameters of the developed methodology were studied. Method validation was performed by analyzing freshly and aged spiked soil samples. The recoveries and relative standard deviations reached using the optimized conditions were between 77.0±0.46% and 120±2.9% except for ethiofencarb (46.4±4.4% to 105±1.6%) and butylate (22.1±7.6% to 49.2±11%). Soil samples from five locations of Portugal were analysed.

Keywords:

• Carbamates
• liquid chromatography
• microwave-assisted extraction
• pesticides
• soils
• ureas

The authors thank the Fundação para a Ciência e a Tecnologia for the financial support through the project POCTI/AGR/44491/2002 (co-financed by FEDER).

Notes

SD - standard deviation, LOD - limit of detection, LOQ -limit of quantification

RSD-relative standard deviation, n-number of samples, n.d.-not detected

RSD-relative standard deviation, n-number of samples

RSD-relative standard deviation, n-number of samples

RSD-relative standard deviation, n-number of samples