Figure 2: Chromatographic spectra of citalopram (325.3→109.0) for the selectivity analysis in hair. (a-f) Six different blank samples not spiked with citalopram and desipramine (negative samples). (g-l) Six blank samples spiked with citalopram and desipramine (positive samples), at the final concentration of 162.2 ng/mL. Y-axis in counts per second (cps).