MONITORING OF THE ULTRASONIC IRRADIATION EFFECT ON THE EXTRACTION OF AIRBORNE PARTICULATE MATTER BY ION CHROMATOGRAPHY

The action of ultrasonic waves in liquids can induce or accelerate che mical reactions of the liquids and/or substances dissolved. A study on ultrasonic irradiation effects in aqueous and acetone extracts from a irborne particulate matter, was developed. Several systems such as sol vents, filters, standard reference material of airborne particles and real samples from atmospheric particulate matter were evaluated. The g eneration of anionic species during the sonication process was confirm ed by ion chromatography. The change of quantitative and qualitative d ata has shown that ultrasonic extraction leads to false interpretation of analytical results.