Abstract
Formaldehyde and acetaldehyde in water were determined by preconcentration with poly(allylamine) beads, derivatization with 2,4-dinitrophenylhydrazine (DPH) and analysis by HPLC. Poly(allylamine) beads (0.5 g) were used to adsorb formaldehyde and acetaldehyde at 1.2–150 μg l −1 and 3.5–220 μg l −1 from water (1 l). The concentration factor is 50 fold. The aldehydes were eluted and derivatized with 2 m M DPH in 0.5 M H 2SO 4 (10 ml). The time of analysis was 1 h. The detection limits ( S/N=3) for formaldehyde and acetaldehyde were 0.6 and 2 μg 1 −1, respectively.
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