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View Actual EPA Method TO-5 (PDF File)
EPA Method TO-5:
METHOD FOR THE DETERMINATION OF ALDEHYDES AND KETONES IN AMBIENT AIR USING HIGH PERFORMANCE LIQUID CHROMATOGRAPHY (HPLC)
Summary:
Ambient air is drawn through a midget impinger containing 10 mL of 2N HC1/0.05% 2,4- dinitrophenylhydrazine (DNPH reagent) and 10 mL of isooctane. Aldehydes and ketones readily form stable 2,4-dinitrophenylhydrazones (DNPH derivatives).
Scope:
This document describes a method for determination of individual aldehydes and ketones in ambient air. With careful attention to reagent purity and other factors the method can detect most monofunctional aldehydes and ketones at the 1-2 ppbv level.
Report Number:
600/4-89-017