Acorn Analytical Services (UK) Ltd services

Asbestos air testing is an activity where a known rate of air is drawn through a filter over a measured period of time. During this time, airborne particles are collected on to the filter. The filter is then prepared for examination under a microscope. A representative percentage of the filtered is examined using phase contrast microscopy to count all fibres seen. Only fibres which meet the set size criteria are then counted over a number of areas. The number of fibres counted on the filter is then divided by the volume of air collected to calculate the overall fibre concentration. This is shown as fibres per cubic centimetre of air (f/cm³).