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Analysis of functional groups in atmospheric aerosols by infrared spectroscopy: systematic intercomparison of calibration methods for US measurement network samples

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Figure

Figure 1. Laboratory and ambient sample spectra (raw and baseline corrected). Black lines denote mean absorbances, and dashed gray areasdenote 95 % confidence intervals.
Figure 2. Top row: integrated absorption as a function of known molar abundance used to derive molar absorption coefficients
Figure 3. Summary of molar absorption coefficients reported in the literature. The single star for 1-docosanol aCOH indicates that there areonly three points – one of which is an influential point – so this is effectively a single-point estimate
Figure 4. Comparison of estimated OC (FG OC) against OC mea-sured by TOR method (TOR OC)
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