
Figure 1
A) Chromatogram of the 3,4-dihydroxybenzylamine solution, used as the internal standard (the number above the component is the retention time in minutes); B) Identified component with peak height and the area under the peak; IS − internal standard

Figure 2
A) Chromatogram of the ClinTest® Standard Solution (the number above the component is the retention time in minutes); B) Identified components with peak height and the area under the peak; DP − dopamine; E – epinephrine; IS − internal standard; NE – norepinephrine

Figure 3
A) Chromatogram of the extract purified on the alumina cartridge (the number above the component is the retention time in minutes); B) Identified components with peak height and the area under the peak; E – epinephrine; IS − internal standard; NE – norepinephrine

Figure 4
A) Chromatogram of the extract purified by filtration (the number above the component is the retention time in minutes); B) Identified components with peak height and the area under the peak; DP − dopamine; E – epinephrine; IS − internal standard; NE – norepinephrine

Figure 5
A) Chromatogram of the filtrated extract purified on the alumina cartridge (the number above the component is the retention time in minutes); B) Identified components with peak height and the area under the peak; E – epinephrine; IS − internal standard; NE – norepinephrine
