Supplementary material to "Comparison of VOC measurements made by PTR-MS, AdsorbentTube/GC-FID-MS and DNPH-derivatization/HPLC during theSydney Particle Study, 2012: a contribution to the assessment ofuncertainty in current atmospheric VOC measurements" Article Swipe
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· 2017
· Open Access
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· DOI: https://doi.org/10.5194/amt-2016-349-supplement
· OA: W4241316434
The uncertainty analysis of these measurement proceeds via the mathematical model, here called the measurement equation, for the measurement following the Guide to Expression of Uncertainty in Measurement and the law of propagation of uncertainty (JCGM, 2008b) also known as the error propagation equation (Bevington and Robinson, 1992; Harris, 2003).All uncertainties in this analysis are expanded uncertainties with a coverage factor k = 2.The associated level of confidence of the uncertainty interval is typically 95%.The equation for propagation of uncertainty for a measurement equation:In this equation and subsequent uncertainty interpretations, variances are represented as population values.In the calculations the experimentally determined variances are used.In this analysis, based on a knowledge of the measurement procedure, some uncertainties are set as random and can be diminished by multiple observations, whereas others are fixed.We assume that all errors evaluated here are uncorrelated.
