Agilent Technologies 7500 ICP-MS

A-25
Agilent 7500 ICP-MS ChemStation Operator’s Manual
Appendix
Correct the CPS of the element to be quantitatively analyzed using the
virtual-internal-standard correction coefficient.
where
Cps_na:Corrected CPS of the element to be quantitatively
analyzed
Cps_sa: CPS of the element to be quantitatively analyzed
Ra: Virtual-internal-standard correction coefficient for the
CPS of the element to be quantitatively analyzed
n
Mi
MiS
i
i
MM
∑
∑
−=
2
2
)(
)(
n
RiMi
MiRiS
ii
i
MR
∑∑
∑
−= )(
)(
n
MiMi
MiS
ii
i
MM
∑∑
∑
−=
2
3
)(
2
n
RiMi
RiMiS
ii
i
RM
∑∑
∑
−=
2
2
)(
2
∑
∑
−=
i
i
MM
n
Mi
MiS
22
4
)(
)(
22
RasaCpsnaCps *__ =