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. Author manuscript; available in PMC: 2021 Aug 20.
Published in final edited form as: Anal Chem. 2018 Oct 24;90(21):12752–12760. doi: 10.1021/acs.analchem.8b03118

Figure 2.

Figure 2.

Predicted and observed RI for 91 unknowns. True positive predictions are shown as diamonds; false negative predictions are shown as triangles. Model sensitivity is close to the expected 95% for RI < 900 (92% sensitivity) and RI > 1120 (91% sensitivity) but poor in the intervening range. Sensitivity is 100% for unknowns with RI values <300 and >1400. A detailed version of this figure is included in Supporting Information SI–4 showing separate results for each of the 8 filter range categories.