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@ARTICLE{Lagarde:52843,
      author       = {Lagarde, F. and Pütz, T. and Dressel, J. and Führ, F.},
      title        = {{S}imultaneous {D}etermination of {E}thidimuron,
                      {M}ethabenzthiazuron, and {T}heir {T}wo {M}ajor
                      {D}egradation {P}roducts in {S}oil},
      journal      = {Journal of agricultural and food chemistry},
      volume       = {54},
      issn         = {0021-8561},
      address      = {Washington, DC [u.a.]},
      publisher    = {American Chemical Society (ACS)},
      reportid     = {PreJuSER-52843},
      pages        = {7450 - 7459},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {An analytical method has been developed for the
                      quantification of two herbicides (ethidimuron and
                      methabenzthiazuron) and their two main soil derivatives.
                      This method involves fluidized-bed extraction (FBE) prior to
                      cleanup and analysis by reverse-phase liquid chromatography
                      with UV detection at 282 nm. FBE conditions were established
                      to provide efficient extraction without degradation of the
                      four analytes. (14)C-labeled compounds were used for the
                      optimization of extraction and purification steps and for
                      the determination of related efficiencies. Extraction was
                      optimal using a fexIKA extractor operating at 110 degrees C
                      for three cycles (total time = 95 min) with 75 g of soil and
                      150 mL of a 60:40 v/v acetone/water mixture. Extracts were
                      further purified on a 500 mg silica SPE cartridge.
                      Separation was performed on a C18 Purosphere column (250 mm
                      x 4 mm i.d.), at 0.8 mL min(-1) and 30 degrees C with an
                      elution gradient made up of phosphoric acid aqueous solution
                      (pH 2.2) and acetonitrile. Calibration curves were found to
                      be linear in the 0.5-50 mg L(-1) concentration range.
                      Besides freshly spiked soil samples, method validation
                      included the analysis of samples with aged residues.
                      Recovery values, determined from spiked samples, were close
                      to $100\%.$ Limits of detection ranged between 2 and 3
                      microg kg(-1) of dry soil and limits of quantification
                      between 8 and 10 microg kg(-1) of dry soil. An attempt to
                      improve these performances by using fluorescence detection
                      following postcolumn derivatization by
                      orthophthalaldehyde-mercaptoethanol reagent was
                      unsuccessful.},
      keywords     = {Benzothiazoles: analysis / Benzothiazoles: chemistry /
                      Chromatography, High Pressure Liquid: methods / Herbicides:
                      analysis / Methylurea Compounds: analysis / Methylurea
                      Compounds: chemistry / Photolysis / Sensitivity and
                      Specificity / Soil: analysis / Solutions / Benzothiazoles
                      (NLM Chemicals) / Herbicides (NLM Chemicals) / Methylurea
                      Compounds (NLM Chemicals) / Soil (NLM Chemicals) / Solutions
                      (NLM Chemicals) / ethidimuron (NLM Chemicals) /
                      methabenzthiazuron (NLM Chemicals) / J (WoSType)},
      cin          = {ICG-IV},
      ddc          = {630},
      cid          = {I:(DE-Juel1)VDB50},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Agriculture, Multidisciplinary / Chemistry, Applied / Food
                      Science $\&$ Technology},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:17002407},
      UT           = {WOS:000240795400007},
      doi          = {10.1021/jf061042v},
      url          = {https://juser.fz-juelich.de/record/52843},
}