DETERMINATION OF CARBONYL-COMPOUNDS IN EM ISSIONS FROM MANUFACTURE AND STORAGE OF RUBBER PRODUCTS

Activated carbon and silica gels surface-modified with 2,4 dinitrophen yl hydrazine (DNPH), are examined in terms of their suitability for sa mpling aldehydes and ketones in vulcanisation fumes. In the presence o f various peripheral conditions the selectivity of the method is simul ated and validated. Humidity has no significant influence on redetecti on of the substances being analyzed by the DNPH method. The study demo nstrates that the deriving reaction in itself is preceded by an adsorp tion on the substrate material and that subsequent quantitative transf ormation to the hydrazone requires different reaction times depending on the reactivity of the carbonyl components.