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@ARTICLE{Liu:21513,
      author       = {Liu, B. and Zhang, Y. and Mayer, D. and Krause, H.-J. and
                      Jin, Q and Zhao, J. and Offenhäusser, A. and Xu, Y.},
      title        = {{D}etermination of heavy metal ions by microchip capillary
                      electrophoresis coupled with contactless conductivity
                      detection},
      journal      = {Electrophoresis},
      volume       = {33},
      issn         = {0173-0835},
      address      = {Weinheim},
      publisher    = {Wiley-Blackwell},
      reportid     = {PreJuSER-21513},
      pages        = {1247 - 1250},
      year         = {2012},
      note         = {This work was supported by grants from the Science and
                      Technology Commission of Shanghai Municipality (Grants No.
                      09JC1416500, 09391911500, 10391901600, 1052nm06100), the
                      China Scholarship Council (CSC), the German Helmholtz
                      Association, and the German BMBF at DLR (Grant CHW09/009).},
      abstract     = {An integrated detection circuitry based on a lock-in
                      amplifier was designed for contactless conductivity
                      determination of heavy metals. Combined with a
                      simple-structure electrophoresis microchip, the detection
                      system is successfully utilized for the separation and
                      determination of various heavy metals. The influences of the
                      running buffer and detection conditions on the response of
                      the detector have been investigated. Six millimole
                      2-morpholinoethanesulfonic acid + histidine were selected as
                      buffer for its stable baseline and high sensitivity. The
                      best signals were recorded with a frequency of 38 kHz and 20
                      V(pp). The results showed that Mn(2+), Cd(2+), Co(2+), and
                      Cu(2+) can be successfully separated and detected within 100
                      s by our system. The detection limits for five heavy metals
                      (Mn(2+), Pb(2+), Cd(2+), Co(2+), and Cu(2+)) were determined
                      to range from about 0.7 to 5.4 μM. This microchip system
                      performs a crucial step toward the realization of a simple,
                      inexpensive, and portable analytical device for metal
                      analysis.},
      keywords     = {Electric Conductivity / Electrophoresis, Microchip:
                      instrumentation / Electrophoresis, Microchip: methods /
                      Limit of Detection / Metals, Heavy: analysis / Metals, Heavy
                      (NLM Chemicals) / J (WoSType)},
      cin          = {PGI-8 / ICS-8 / JARA-FIT},
      ddc          = {570},
      cid          = {I:(DE-Juel1)PGI-8-20110106 / I:(DE-Juel1)ICS-8-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {Grundlagen für zukünftige Informationstechnologien /
                      BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung},
      pid          = {G:(DE-Juel1)FUEK412 / G:(DE-Juel1)FUEK505},
      shelfmark    = {Biochemical Research Methods / Chemistry, Analytical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22589101},
      UT           = {WOS:000304040500003},
      doi          = {10.1002/elps.201100626},
      url          = {https://juser.fz-juelich.de/record/21513},
}