DETERMINATION OF PARTICLE MASS DEPOSITION ACCORDING TO BERGERHOFF - PERFORMANCE-CHARACTERISTICS OF THE MEASUREMENT OF PARTICLE MASS DEPOSITION AND ITS PORTIONS OF LEAD, CADMIUM, ZINC AND THALLIUM

The requirements concerning quality assurance have increased considera bly in the field of immission control. Well founded values for detecti on limits and confidence limits have to be given. Based on the statist ical analysis of long term data series of deposition measurements of p article mass (Bergerhoff method), lead, cadmium, zinc and thallium per formance characteristics were established for very differently pollute d sites. The resulting detection limits as well as confidence limits a re low enough for a reliable control of the respective immission limit values. It is further shown that the use of plastic buckets instead o f the glass buckets required by the VDI guideline or the addition of a protecting agent to avoid freezing does not affect the measurements s ignificantly.