Wow, it's been busy. Got a new ICP mass spec with some new features not seen before on any previous ICP mass spectrometers. Now, for the first time ever, copper can be analyzed in a matrix of salt water without any matrix removal, all while keeping the detection limit below the EPA action limit. Also, no internal standard suppression more than 60%. Since we don't write papers for journal submission, I'm announcing this to the chemistry community here.
Important factors in the analysis include a specific nebuliser optimization, cones that are water cooled, but are allowed to be at a higher temperature than previous models, and a really long rinse time.
Any chemist out there that are analyzing copper in seawater on ICPMS, inquire here for smooth analyses.
Thursday, February 22, 2007
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5 comments:
Do you still need to use 65 instead of 63 to avoid the NaAr?
Yes, we use mass 65, but 63 usually agrees fairly well. Most Ar polyatomics are knocked out by the collision cell. Thanks for the question, man.
Nice little blog you've got going here. I started something similar, come over and take a look at ChromoSpec Forums
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What type of issues does a typical ICP MS have for analysing copper with some salt water interferences?
I'm with an environemntal firm dealing with a groundwater discharge to surface water, trying to meet the 2.9 ug/l standard. Using regular ICP we got 4.6 ug/l and using AA furnace and an MIBK extration 3.0 ug/l. No, they won't get off the 2.9 number!!
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