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Abstract

THE AIM OF THIS WORK IS TO PRODUCE A NEW POTENTIAL AEROSOL REFERENCE MATERIAL BY DEPOSITING AMBIENT AEROSOL HOMOGENEOUSLY ONTO LARGE FILTERS. THE AEROSOL FILTERS ARE DIVIDED UP INTO SMALL DISKS, PART OF WHICH IS USED FOR CHARACTERISATION PRIOR TO CERTIFICATION OF THE MATERIAL. IT IS ESSENTIAL THAT THE UNIFORMITY OF THE AEROSOL DEPOSITS CAN BE SPECIFIED WITHIN GIVEN LIMITS. USING HIGH-VOLUME AEROSOL SAMPLERS LATERALLY UNIFORM DEPOSITS WITHIN 10% RELATIVE UNCERTAINTY CAN BE PRODUCED ON CELLULOSIC NITRATE ESTER AND ACETATE ESTER MEMBRANES AND ALSO ON NUCLEPORE FILTERS WITH TOTAL DEPOSITS IN THE RANGE 0.1 TO 0.5 MG/CM2. OTHER TESTED FILTER MATERIALS HAD TO BE DISCARDED FOR NON-HOMOGENEITY. THE UNIFORMITY OF DEPOSITS WAS DETERMINED - BESIDES WEIGHING - BY AAS ANALYSES OF THE "MARKET ELEMENTS" NI, CD AND PB FOR THE FINE PARTICLE FRACTION AND CA, MN AND FE FOR COARSE PARTICLES. THE CHARACTERISATION OF THE FINAL FILTER BATCHES WILL BE DONE BY SEVERAL ANALYTICAL METHODS, AMONG THEM NEUTRON ACTIVATION ANALYSIS, AAS, XRF AND PIXE ANALYSIS, BY SEVERAL LABORATORIES. INDIVIDUAL UNIFORMITY TESTING OF THE DISTRIBUTED FILTER DISKS IS RELIABLY DONE BY PIXE ANALYIS ON THE RESIDUAL FILTER MATERIAL AFFECTING THE SMALL FILTER DISKS OUT OF THE LARGE MEMBRANES.

Additional information

Authors: KRIEWS M, INSTITUT FUER ANORGANISCHE UND ANGEWANDTE CHEMIE DER UNIV. MARTIN LUTHER-KING, HAMBURG, D;JRC-GEEL;DANNECKER W, INSTITUT FUER ANORGANISCHE UND ANGEWANDTE CHEMIE DER UNIV. MARTIN LUTHER-KING, HAMBURG, D;JRC-GEEL;NAUMANN K, INSTITUT FUER ANORGANISCHE UND ANGEWANDTE CHEMIE DER UNIV. MARTIN LUTHER-KING, HAMBURG, D;JRC-GEEL;WATJEN U INSTITUT FUER ANORGANISCHE UND ANGEWANDTE CHEMIE DER UNIV. MARTIN LUTHER-KING, HAMBURG, D, INSTITUT FUER ANORGANISCHE UND ANGEWANDTE CHEMIE DER UNIV. MARTIN LUTHER-KING, HAMBURG, D;JRC-GEEL;JRC-GEEL, INSTITUT FUER ANORGANISCHE UND ANGEWANDTE CHEMIE DER UNIV. MARTIN LUTHER-KING, HAMBURG, D;JRC-GEEL
Bibliographic Reference: PAPER PRESENTED: EUROPEAN AEROSOL CONFERENCE, LUND, SWEDEN, AUG. 30, SEPT. 2, 1988
Availability: Can be ordered online
Record Number: 1989126213600 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en