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      Determination of ultratrace levels of dissolved metals in seawater by reaction cell inductively coupled plasma mass spectrometry after ammonia induced magnesium hydroxide coprecipitation.

      1 , ,
      Analytica chimica acta
      Elsevier BV

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          Abstract

          A method for the determination of ultratrace amounts of Cr, Fe, Mn, Pb and Zn in seawater has been developed. It combined the low-blank magnesium hydroxide coprecipitation procedure with quadrupole inductively coupled plasma mass spectrometry and used the dynamic reaction cell technique to resolve the polyatomic interferences arising from the residual matrix, the solvent and plasma gases. Detection limits (3σ(B), n=10) for Cr, Fe, Mn, Pb and Zn were 0.02, 0.10, 0.01, 0.002 and 0.19 nM, respectively, using 50 mL of seawater sample. The accuracy of the analytical procedure was verified by the analysis of the seawater reference materials CASS-4, NASS-5, SAFe D2 and SAFe S. The analytical precision ranged from 3% to 16% (n=6), with a sample throughput of about 6 samples h(-1).

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          Author and article information

          Journal
          Anal. Chim. Acta
          Analytica chimica acta
          Elsevier BV
          1873-4324
          0003-2670
          Nov 07 2011
          : 706
          : 1
          Affiliations
          [1 ] Department of Chemistry and Industrial Chemistry, University of Genoa, Genoa, Italy.
          Article
          S0003-2670(11)01075-0
          10.1016/j.aca.2011.07.046
          21995913
          e883a16f-78af-4a11-b278-ee45fbb4cd15
          History

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