Skip to main content
. 2019 May 22;24(10):1971. doi: 10.3390/molecules24101971

Table 1.

Validation parameters of the used LC-MS/MS method.

Validation Parameters * Acrylamide 13C3-acrylamide HMF
Calibration curve equation y = 6421.6x − 2739.3 y = 7114.5x − 2567.8 y = 205.38x + 6249.7
R2 0.997 0.998 0.999
LOD (ng/g) 0.62 0.58 18.9
LOQ (ng/g) 1.89 1.75 57.5
Retention time (min) 9.10 ± 0.07 9.10 ± 0.06 13.3 ± 0.08
RA (%) Lower concentration 91.2 91.9 90.0
Higher concentration 91.6 92.3 90.9
Average 91.4 92.1 90.4
RE (%) Lower concentration 92.7 93.1 91.2
Higher concentration 93.0 93.9 94.2
Average 92.8 93.5 92.7
SSE (%) Lower concentration 98.5 98.8 98.7
Higher concentration 98.5 98.3 96.5
Average 98.5 98.5 97.6
RSD Intraday (%) Lower concentration 2.89 2.77 3.17
Higher concentration 2.86 2.91 3.15
Average 2.88 2.84 3.16
RSD Interday (%) Lower concentration 3.12 3.01 3.36
Higher concentration 3.06 3.08 3.43
Average 3.09 3.05 3.40

R2—regression coefficient; LOD—limit of detection; LOQ—limit of quantification; RA—apparent recovery; RE—extraction efficiency; SSE—signal suppression/enhancement; RSD—relative standard deviation; * n = 6 for recovery and precison experiments at two concetration levels (lower concentration: 5 ng/g for acrylamide and 13C3-acrylamide and 100 ng/g for HMF; higher concentration: 10 ng/g for acrylamide and 13C3-acrylamide and 250 ng/g for HMF.