The limit of quantitation (LOQ) was set to be the lowest fortification
level at which acceptable recovery data were obtained per
China’s National Standards (NY/T 788-2004). Therefore, the LOQ
for all matrices were 0.01 mg/kg in this study. The limit of detection
(LOD) is 0.1 ng and defined as the lowest calibration standard
used whose signal–noise ratio is found to be greater than 3. A typical
chromatogram is shown in