6533b854fe1ef96bd12ade76
RESEARCH PRODUCT
Determination of pesticides in soil samples by solid phase extraction disks
Guillermina FontM.j. RedondoRafael BoludaM. J. Ruizsubject
Detection limitChromatographySoil testPesticide residueOrganic ChemistryClinical BiochemistryExtraction (chemistry)BiochemistryAnalytical Chemistrychemistry.chemical_compoundchemistryEnvironmental chemistrySolid phase extractionGas chromatographyAtrazineCarbofurandescription
A systematic study comparing the methodology and analytical results obtained in an investigation of seven pesticide residues (Molinate, Atrazine, Carbofuran, Pirimicarb, Prometryn, Malathion and Tetrachlorvinphos) in soil samples is reported. Solid-phase extraction (SPE) using glass columns and 47 mm disks of octyl and octadecyl-bonded silica was used in the pesticide analysis. The best extraction efficiency and clearest extracts are obtained with C8 disks. The analyses were carried out by capillary gas chromatography with nitrogen and phosphorus detection. Recovery experiments were performed at ppb levels in spiked soil samples. The average recoveries of the compounds were 53–77%. Detection limits are between 5 and 30 ng g−1 based on 5 g moist soil sample. The method was validated by comparing it with conventional liquid-liquid extraction.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-12-01 | Chromatographia |