Agilent Technologies 7500 ICP-MS Operator's Manual page 637

Agilent 7500 ICP-MS ChemStation Operator's Manual
Appendix
DL
DL refers to a concentration equivalent to 3 σ B.
The equation for DL varies depending on the calibration formula.
If a linear equation such as y = ax + b is used:
DL = 3 σ B/a
Where,
3 σ B: value three times the standard deviation of the count at the 0 concentration
level.
a: a in y = ax + b
The unit set in the calibration should be used and must not be changed.
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