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Agilent 7500 ICP-MS ChemStation Operator’s Manual
Performing a Semiquantitative Analysis
Performing a Semiquantitative
Analysis
You perform a semiquantitative analysis to obtain information about the
concentrations of all elements that are present in an unknown sample. It is a very
powerful tool to obtain concentration information for a large number of elements
(>70) without the need for external calibration. It is very useful as a screen prior to
quantitative analysis on target elements. Typically, semiquantitative analysis is
accurate to +/- 30% or better on completely unknown samples. ChemStation can
subtract a sample reagent blank and compensate for changes in sample matrix using
internal standardization
This chapter explains how to set element response factors, view the responses from
a semiquantitative analysis, and generate a semiquantitative report.
NOTE You can not use Semiquantitative analysis with ShieldTorch (cool plasma) conditions
or Agilent 7500ce reaction mode. The reason for this is that all element response
factors in the ChemStation data base, are calculated using normal plasma conditions
and ion energies.
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