The Marylebone Road Aethalometer Trial report, undertaken by King’s and NPL for Defra, has been released on the Defra Air Quality site.

This report details the results of the measurements made at Marylebone Road during 2006 using seven different instruments, all of which measured black smoke, clack carbon or elemental carbon.

The aim of this study was to determine whether alternatives to the traditional 8-port sampler method could be used to measure black smoke as the 8-port sampler method is labour intensive and measurements cannot be provided in real time.

Comparability of all measurements those made using the 8-port sampler and to accurate measurements of elemental carbon (using the Sunset Laboratories instrument) were considered. The practicality of integrating these more continuous instruments into the network was also evaluated.

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Item date 04/12/2007