414631.fig.006a
(a)
414631.fig.006b
(b)
Figure 6: Calibration curves of the doubly charged sodium adduct of the MCYST-LR molecular ion in MeOH and the estimated calibration curves in food additive matrices (salmon hydrolyzate and Stigeoclonium sp. extract). From (a) to (b) the estimated calibration curve in salmon hydrolyzate and the estimated calibration curve in Stigeoclonium sp. extract. The blue stars represent the measured calibration curve of the doubly charged sodium adduct of the MCYST-LR molecular ion in MeOH. The red circles represent the measured calibration curve of the doubly charged sodium adduct of the MCYST-LR molecular ion in a given food additive matrix. The green lines represent the estimated calibration curve of the doubly charged sodium adduct of the MCYST-LR molecular ion in a given food additive matrix. Units for graph axes are follows: μg/mL for the -axis and counts for the -axis.