Like Martin, I have used Al cones for low Ni background. The only downside of the heat dissipation of Al is that oxides, etc., tend to be higher. My best ever Mo/MoO oxides with an Apex unit were 0.1% or so with Ni, but slightly <1% with Al, best I could optimize.
R. Steven Pappas, Ph.D.
Emergency Response & Air Toxicants Branch
Centers for Disease Control & Prevention
4770 Buford Hwy. NE, M.S. F-44
Atlanta, GA 30341-3717
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From: PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's). [mailto:[log in to unmask]] On Behalf Of Seth John
Sent: Wednesday, December 01, 2010 7:42 AM
To: [log in to unmask]
Subject: Re: Aluminum cones
Thanks for the clarification, I guess it was just the first aluminum x-
cone skimmer requested since then.
Still, Aluminum cones seem to be far less common than nickel, and I
wondered if there were disadvantages for some users since my
experience is that Al actually performs better (in terms of
durability) compared to Ni.