Transition (m/z) Weight Linear range (ng/mL) Linearity r2 LOQb(ng/mL) Slopea Intercepta 325.3→109.0 1/x 32.4–973.2 2.372 ± 0.657 0.020 ± 0.025 0.994 ± 0.003 32.4 aMean values ± standard deviation bLimit of quantification

Table 3: Analytical parameters of the calibration curve for citalopram.