Agilent Technologies 7500 ICP-MS

A-22
Agilent 7500 ICP-MS ChemStation Operator’s Manual
Appendix
Standard Deviation of the Concentration
When a linear regression is used, the standard deviation is calculated as follows.
where
: number of sample repeats
: concentration
SD
x
n
x
n
i
i
i
i
=
−
⎛
⎝
⎜
⎞
⎠
⎟
−
∑∑
2
2
1
1
n
x
i