Calculateur de Nombre de Plateaux — Formule
## Signal-to-Noise Ratio in Analytical Chemistry
The signal-to-noise ratio quantifies the quality of an analytical measurement. Higher S/N means the signal is more reliably distinguishable from background noise.
### Formula
**S/N = Signal Height / Noise Level**
Noise is typically measured as peak-to-peak variation in a blank region. S/N of 3 is the detection limit criterion; S/N of 10 is the quantitation limit criterion.
The signal-to-noise ratio quantifies the quality of an analytical measurement. Higher S/N means the signal is more reliably distinguishable from background noise.
### Formula
**S/N = Signal Height / Noise Level**
Noise is typically measured as peak-to-peak variation in a blank region. S/N of 3 is the detection limit criterion; S/N of 10 is the quantitation limit criterion.
Exemple Résolu
A chromatographic peak has a height of 100 units and baseline noise of 5 units peak-to-peak.
- S/N = 100 / 5 = 20
- S/N (dB) = 20 × log10(20) = 20 × 1.301 = 26.0 dB
- Well above quantitation limit (S/N = 10)