Rapid Determination of PpB Levels of Aldehydes in Ambient Air by High-Performance Liquid Chromatography

摘要

A simple technique is described for determining ambient atmospheric levels of formaldehyde and acetaldehyde using impinger collection in acidified 2,4-dinitrophenylhydrazine/acetonitrile solution and direct analysis by high-performance liquid chromatogrpy-uv absorbance detection of the corresponding phenylhydrazone derivatives on reversed-phase columns. A limit of detection of approx. 1 ppB for 1-hr impinger collections is obtained. Data from a coastal NE USA site showed no discernable diurnal trends, but strong seasonal variations in the levels of both formaldehyde and acetaldehyde were observed, with summer maxima and winter minima. Formaldehyde/acetaldehyde ratios were relatively high (>4) in winter and spring, but were low (<2) in summer and fall. 18 references, 18 figures, 20 tables. (ERA citation 09:029197)