Very low concentrations (pg mL 1 or sub-pg mL 1 level) along with the high salinity are the mainproblems in determining trace metal contents in seawater. This problem is mainly considered forinvestigations of naturally occurring YLOID (Y and Lanthanides) and Zr and Hf in order to provide preciseand accurate results. The inductively coupled plasma mass spectrometry (ICP-MS), both in high and lowresolution, offers many advantages including simultaneous analyses of all elements and their quantitativedetermination with detection limits of the order of pg mL 1. However in the analysis of YLOID inseawater, a better determination needs an efficient combination of ICP-MS measurement with a preconcentrationtechnique. To perform an ultra-trace analysis in seawater, we have validated an analyticalprocedure involving an improved modified co-precipitation on iron hydroxides to ensure the simultaneousquantitative recovery of YLOID, Zr and Hf contents with measurement by a quadrupole ICP-MS.The validity of the method was assessed through a series of co-precipitation experiments andestimation of several quality control parameters for method validation, namely working range and itslinearity, detection limit, quantification limit, precision and spike recoveries, and the methodologicalblank choice, are introduced, evaluated and discussed. Analysis of NASS-6, is the first report on the latestseawater reference material for YLOID, hafnium and zirconium.
|Numero di pagine||7|
|Stato di pubblicazione||Published - 2013|
All Science Journal Classification (ASJC) codes
- Analytical Chemistry