I guess the waste sample contains high level of Cl. Adding HCl to standards and rinsing solution will help.
Dengwei (David) Huo, Ph.D.
GE Nuclear/Global Nuclear Fuel-America
T 910 819-5844
E [log in to unmask]
3901 Castle Hayne Road
P.O. Box 780, M/C H92
Wilmington, NC 28402 USA
From: PLASMACHEM-L: Analytical Chem.(ICP's, DCP's, MIP's). [mailto:[log in to unmask]] On Behalf Of Dirk Wüstkamp
Sent: Friday, January 22, 2010 12:14 PM
To: [log in to unmask]
Subject: Re: Sb Antimony carryover in ICP-OES
Dear Gerry Grady,
if you are a Varian guy you can contact me under [log in to unmask]
There is a very simple answer.
> I have an application query from a customer lab regarding unusual
> behaviour of Antimony in ICP-OES analysis.
> In summary it appears that Antimony exhibits carryover when in simple
> Sample & Standard matrices (e.g. 1%HNO3), but washes out quickly & has
> excellent RSD's in a more complex sample solution (in this case a
> wastewater sample from a base metal mine with about 1000ppm dissolved
> Sb concentrations are in the region of 100 ug/L.
> I have heard that adding tartaric acid is the key to solving this Sb
> stability/ mobility problem, but would welcome any specific advice.
> Instrument is a Varian 720 AX.
> Many thanks for an comment!
> Gerry Grady
> Varian ICP Sales
> JVA Analytical Ltd
> ph 00-353-87-4569822