Screening method for linear alkylbenzene sulfonates in sediments based on water Soxhlet extraction assisted by focused microwaves with on-line preconcentration/derivatization/detection.
A screening method for linear alkylbenzene sulfonates (LAS) in sediments has been developed. Soxhlet extraction with water assisted by focused microwaves provides recoveries better (>90%) than obtained by conventional Soxhlet extraction (70-80%). Coupling of the extractor with an on-line preconcentration/derivatization/detection manifold through a flow injection (FI) interface allows a fully automated screening approach. A yes/no answer can be obtained in less than 2 h (for the whole analytical process), a short time compared with the at least 24 h of Soxhlet extraction (without final detection). Due to the use of water as leaching agent, the proposed method is environmentally friendly.
Morales-Muñoz
S
S
Department of Analytical Chemistry, University of Córdoba, Marie Curie Building, Annex C-3, Campus of Rabanales, E-14071 Córdoba, Spain.
Luque-García
J L
JL
de Castro
Luque
L
D017738:Alkanesulfonic Acids / Q000032:analysis*; D002845:Chromatography / Q000379:methods*; D004463:Ecology; D008872:Microwaves; D012680:Sensitivity and Specificity; D012987:Soil / Q000032:analysis*; D014867:Water / Q000737:chemistry
D017738:Alkanesulfonic Acids; D012987:Soil; C030641:alkylbenzyl sulfonic acid; D014867:Water