Pierre;
We can typically analyze sulfuric acid down to 500 ppt.  We dilute the
sulfuric acid 1:10 and have had no problems.  We use a HP4500 fitted with a
quartz concentric nebulizer and a cyclonic spraychamber.  Your setup should
work fine as long as you have Pt cones as Ni cones will wear out fairly
quickly.  In addition, standard addition will not work for those elements
that suffer sulfur interferences such as Ti, Ge, Mo, V, and Cd.

Thong Ta
Ashland Chemical-ECD Pueblo
250 William White Blvd.
Pueblo, CO
81001
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                      Pierre Labelle
                      <pierre.labelle2@SYM        To:       [log in to unmask]
                      PATICO.CA>                  cc:
                      Sent by:                    Subject:  h2SO4
                      "PLASMACHEM-L:
                      Analytical
                      Chem.(ICP's, DCP's,
                      MIP's)."
                      <PLASMACHEM-L@LISTSE
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                      04/20/2003 06:54 AM
                      Please respond to
                      "PLASMACHEM-L:
                      Analytical
                      Chem.(ICP's, DCP's,
                      MIP's)."






Dear Plasmamembers,

I would like to know if the analysis of trace metals in pure sulfuric acid
 is possible by regular technics like icp-ms Elan 6100.I know that addition
 standard is the best way to eliminate matrix interference but what is the
 best dilution to do whithout problem for cones and nebuliser(I have a
 teflon cyclonic chamber whith a miramist neb) and what element at trace
 ppb level are not possible
 in normal environnement lab.