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. Author manuscript; available in PMC: 2022 Aug 9.
Published in final edited form as: J Aerosol Sci. 2021 May;154:1–16. doi: 10.1016/j.jaerosci.2020.105734

Table 6. Intersystem comparison of reference method mass EIs.

Linear fit results for the AEDC sampling system EC reference method mass EI measurements on the X-axis and the reference method mass EI measurements from the PW (VARIAnT 1) or the MST (VARIAnT 2) sampling system on the Y-axis; all r2 values are greater than 0.98. The degrees of freedom for these fits were included to indicate the limited statistics for these data.

Y-axis Sampling System (EC reference method) VARIAnT Campaign Source Slope Slope Standard Error Intercept (mg/kg fuel) Intercept Standard Error (mg/kg fuel) Degrees of Freedom
PW 1 J85 1.10 0.04 −0.56 1.37 3
PW 1 CAST 1.02 0.04 0.4 2.43 5
PW 1 J85 and CAST 1.03 0.03 0.45 1.4 10
MST 2 J85 1.00 0.08 0.45 2.69 4
MST 2 CAST 0.83 0.09 27.4 33.6 2
MST 2 J85 and CAST 0.88 0.03 7.7 7.8 8