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Determination of diphenylether herbicides in water samples by solid‐phase microextraction coupled to liquid chromatography
Author(s) -
Sheu HongLi,
Sung YuHsiang,
Melwanki Mahaveer B.,
Huang ShangDa
Publication year - 2006
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200600155
Subject(s) - solid phase microextraction , divinylbenzene , extraction (chemistry) , chromatography , detection limit , desorption , repeatability , fiber , chemistry , solvent , analytical chemistry (journal) , adsorption , mass spectrometry , gas chromatography–mass spectrometry , styrene , polymer , organic chemistry , copolymer
Solid‐phase microextraction (SPME) coupled to LC for the analysis of five diphenylether herbicides (aclonifen, bifenox, fluoroglycofen‐ethyl, oxyfluorfen, and lactofen) is described. Various parameters of extraction of analytes onto the fiber (such as type of fiber, extraction time and temperature, pH, impact of salt and organic solute) and desorption from the fiber in the desorption chamber prior to separation (such as type and composition of desorption solvent, desorption mode, soaking time, and flush‐out time) were studied and optimized. Four commercially available SPME fibers were studied. PDMS/divinylbenzene (PDMS/DVB, 60 μm) and carbowax/templated resin (CW/TPR, 50 μm) fibers were selected due to better extraction efficiencies. Repeatability (RSD, <7%), correlation coefficient (>0.994), and detection limit (0.33–1.74 and 0.22–1.94 ng/mL, respectively, for PDMS/DVB and CW/TPR) were investigated. Relative recovery (81–104% for PDMS/DVB and 83–100% for CW/TPR fiber) values have also been calculated. The developed method was successfully applied to the analysis of river water and water collected from a vegetable garden.