SAMPLING FOR SELECTED ALDEHYDE AND KETONE EMISSIONS FROM STATIONARY SOURCES by METHOD 0011

Summary of Method
Gaseous and particulate pollutants are withdrawn isokinetically from an emission source and are collected in aqueous acidic 2,4-DNPH (dinitrophenylhydrazine). Formaldehyde present in the emissions reacts with the DNPH to form the formaldehyde DNPH derivative. The derivative is extracted, solvent-exchanged, concentrated, and then analyzed by chromatography.

This method is applicable to the determination of Destruction and Removal Efficiency (DRE) of the following analytes:

Formaldehyde, Acetaldehye, Acetophenone, Isophorone, Propionaldehyde

This method has been applied specifically to the above analytes but we can extend the method application to other aldehydes and ketones, however, this method is not applicable to quinone, acrolein, methyl ethyl ketone, and methyl isobutyl ketone.

The detection limit for an 850 Litre sample over a 1 hour sampling period may be as 3 low as 10 ppbv for acetophenone and isophorone, 60 ppbv for propionaldehyde, 40 ppbv for acetaldehyde, and 90 ppbv for formaldehyde.

Because the derivatization reaction is based on the formation of an equilibrium state between reactants and products, for some compounds quantitative recoveries may not be achieved until the concentration exceeds 200 ppbv.