ICP-MS and ICP-AAS
ICP-MS and ICP-AAS
(OP)
Hi there,
What are the differences between Inductively Coupled Plasma-Mass Spectrometer(ICP-MS)and Inductively Coupled Plasma-Atomic Absorption Spectrometer(ICP-AAS)?
Thanks
deen
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RE: ICP-MS and ICP-AAS
AA needs source lamps to supply the spectra of the elements being measured – do you perhaps mean atomic emission?
ICP-MS — Comparison of Techniques: High-Resolution
Advantages are high resolution, low interference, low detection limits. A disadvantage is “Slow Analysis Speed: Because the high-resolution mass analyzer uses an electromagnet to separate the masses, it must change the magnetic field strength between one mass and the next.” http://www.missouri.edu/~murrwww/pages/ac_icpms8.shtml
Metals Analysis by ICPMS
“ICP-MS is far superior to any other atomic spectroscopy technique for measuring total element concentrations in solution… ICP-MS actually offers the best of both worlds: 10-100X better sensitivity than graphite furnace AA with the multi-element speed of ICPOES. In comparison to ICPOES, the mass spectra are much simpler than the optical emission spectra. Most heavy elements exhibit hundreds of emission lines, but they have only 1-10 natural isotopes in the mass spectrum.” “http://www.wcaslab.com/icp-ms_index.htm
Selected Reviews on ICP & ICP/MS LC/MS Instrumentation
A listing of review articles, some of which are comparisons.
http://www.lcms.com/rev_inst-icp.htm
RE: ICP-MS and ICP-AAS
In short, one isn't necessarily better than the other, they both have utility. We have both instruments located side-by-side in our lab, and they are used equally often.