Page 258 - Modern Derivatization Methods for Separation Sciences

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Fig. 3.24.
Chromatograms obtained with: (A) a standard mixture; and (B)
a human urine sample. Peaks:1 = 5-hydroxyindole-3-acetic acid;
2 = norepinephrine; 3 = serotonin; 4 = 5-hydroxyindole-3-acetamide; 5 =
epinephrine; 6 = reagent blank. Column: Cosmosil 5C18 (5 µm; 250 x 4.6 mm
I.D.). Mobile phase: acetonitrile-10 mM acetate buffer (pH 6.0) (35:65,
v/v). Flow-rate: 1.0 ml/min.

Fig. 3.25.
Fluorogenic reactions of guanidino compounds with (A) PQ and (B) benzoin.

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