title: Removal of interfering elements in ICP-QMS for the determination of Pt, Rh, and Pd by chemically modified sample introduction capillaries.
abstract: New on-line methods developed for the determination of Pt, Rh, and Pd by inductively coupled plasma-quadrupole mass spectrometry (ICP-QMS) include separation of elements which might lead to spectral interference in the quadrupole instrument. The fused-silica capillaries generally used for transport of the sample to mu-flow nebulizers have been chemically modified with ion-exchanger compounds to remove interfering elements such as Cu, Pb, or Hf. Characterization of the modification procedures by atomic-force microscopy showed that the quality of the quartz material and the kind of modification had a decisive influence on the yield of surface modification, and thus the exchange capacity of the capillaries.
authors.affiliation: Institut für Chemo- und Biosensorik, Münster, Germany.
authors.forename: H G
authors.initials: HG
authors.lastname: Riepe
authors.forename: V
authors.initials: V
authors.lastname: Loreti
authors.forename: R
authors.initials: R
authors.lastname: Garcia-Sanchez
authors.forename: C
authors.initials: C
authors.lastname: Cámara
authors.forename: J
authors.initials: J
authors.lastname: Bettmer