Title
On a possible bias in elemental carbon measurements with the Sunset thermal/optical carbon analyser caused by unstable laser signal
Author
Ammerlaan, B.A.J.
Jedynska, A.D.
Henzing, J.S.
Holzinger, R.
Publication year
2015
Abstract
We present results that demonstrate a possible bias in the fractioning of total carbon (TC) into elemental carbon (EC) and organic carbon (OC) for measurements with the Sunset Laboratory Inc. Thermal/Optical Carbon Aerosol Analyser. The bias is caused by an unstable laser transmission signal. The transmission signal during the analysis of an instrument blank filter can give an indication of the possible bias. If the transmission signal around the OC/EC split point deviates from its initial value, the EC attribution is altered. In a sensitivity study, we show that for a deviation of 10% the EC content is substantially biased.
Subject
Urban Mobility & Environment
CAS - Climate, Air and Sustainability
ELSS - Earth, Life and Social Sciences
Environment & Sustainability
Environment
Urbanisation
Elemental carbon
Split point
Sunset
Thermal optical method
Unstable laser transmission signal
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http://resolver.tudelft.nl/uuid:a0ad5d37-7908-4f6d-a842-b25b142bc767
DOI
https://doi.org/10.1016/j.atmosenv.2015.09.076
TNO identifier
529433
Publisher
Elsevier Ltd
Source
Atmospheric Environment, 122, 571-576
Document type
article