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  • A new automatic aldehyde analyzer using the DNPH method and its application to the monitoring of aldehydes in the smoking and non-smoking sections of a restaurant


A new automatic instrument for sampling and analysis of aldehydes and ketones from air and its features are described. The method combines sampling of these substances from air with dinitrophenylhydrazone (DNPH)-derivatization and high performance liquid chromatography (HPLC) analysis. The core of the versatile, computer controlled instrument is a mini-impinger containing the reaction solution and substituting for the vial rack of an autoinjector. The instrument allows unattended operation for several days. With a tandem configuration (two impingers) up to about 6 samples per hour can be automatically collected and analysed with a detection limit of 1 ug/m{3} for formaldehyde. Lower concentrations can be detected increasing the sampling time.
The new method has been applied to the monitoring of formaldehyde, acetaldehyde, acrolein and acetone concentrations in the smoking and non-smoking sections of two restaurants showing the amount of cross-contamination with two different ventilation systems.

Additional information

Authors: SCHLITT H, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Indoor Air 96, Nagoya (JP), July 21-26, 1996
Availability: Available from (1) as Paper EN 39828 ORA
Record Number: 199611259 / Last updated on: 1996-10-29
Original language: en
Available languages: en