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@ARTICLE{Krachler:13329,
      author       = {Krachler, M. and Mohl, C. and Emons, H. and Shotyk, W.},
      title        = {{A}nalytical procedures for the determination of selected
                      trace elements in peat and plant samples by inductively
                      coupled plasma mass spectrometry},
      journal      = {Spectrochimica acta / B},
      volume       = {57},
      issn         = {0584-8547},
      address      = {Amsterdam [u.a.]},
      reportid     = {PreJuSER-13329},
      pages        = {1277 - 1289},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {A simple, robust and reliable analytical procedure for the
                      determination of 15 elements, namely Ca, V, Cr, Mn, Co, Ni,
                      Cu, Zn, Rb, Ag, Cd, Ba, Tl, Th and U in peat and plant
                      materials by inductively coupled plasma-quadrupole mass
                      spectrometry (ICP-QMS) was developed. Powdered sample
                      aliquots of approximately 220 mg were dissolved with various
                      acid mixtures in a microwave heated high-pressure autoclave
                      capable to digest 40 samples simultaneously. The selection
                      of appropriate amounts of digestion acids (nitric acid,
                      hydrofluoric acid or tetrafluoroboric acid) was crucial to
                      obtain accurate results. The optimized acid mixture for
                      digestion of plant and peat samples consisted of 3 ml HNO3
                      and 0.1 ml HBF4. An ultrasonic nebulizer with an additional
                      membrane desolvation unit was found beneficial for the
                      determination of Co, Ni, Ag, Tl, Th and U, allowing to
                      aspirate a dry sample aerosol into the ICP-QMS. A pneumatic
                      cross flow nebulizer served as sample introduction device
                      for the other elements. Internal standardization was
                      achieved with 103 Rh for all elements, except for Th whose
                      ICP-QMS signals were corrected by Rh-103 and Re-185. Quality
                      control was ascertained by analysis of the certified plant
                      reference material GBW 07602 Bush Branches and Leaves. In
                      almost all cases HNO3 alone could not fully liberate the
                      analytes of interest from the peat or plant matrix, probably
                      because of the silicates present. After adding small amounts
                      (0.05-0.1 ml) of either HF or HBF4 to the digestion mixture,
                      concentrations quantified by ICP-QMS generally increased
                      significantly, in the case of Rb up to $80\%.$ Further
                      increasing the volumes of HF or HBF4 in turn, resulted in a
                      loss of recoveries of almost all elements, some of which
                      amounted to approximately $60\%.$ The successful analytical
                      procedures were applied to the determination of two bulk
                      peat materials. In general, good agreement between the found
                      concentrations and results from an inter-laboratory trial or
                      from instrumental neutron activation data were obtained,
                      underpinning the suitability of the developed analytical
                      approach. (C) 2002 Elsevier Science B.V. All rights
                      reserved.},
      keywords     = {J (WoSType)},
      cin          = {ICG-III},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB49},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Spectroscopy},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000178492500003},
      doi          = {10.1016/S0584-8547(02)00068-X},
      url          = {https://juser.fz-juelich.de/record/13329},
}