Substance y=bx+a Residual standard deviation Process standard deviation Processvariation coefficient (%) Decision limit DL (ng/L) Detection Limit LOD (ng/L) Quantification limit LOQ (ng/L)
a b
(DIN 32645)
Amphetamine 531 1270 2.57 0.20 1.12 0.36 0.71 1.07
Range 1-2.4
Methamphetamine 15555 126.7 6.96 0.55 3.06 0.81 1.65 2.32
Range 3.5-7
MDMA 40.28 1143 6.09 1.11 6.09 0.89 1.77 2.66
Range 3-4.8
Table 2: Validation according to Funk (German Standard DIN 32645).