Table 7. Intra-system comparison of mass instrument mass EI to reference method mass EI.

Intra-system linear fit results for Figs. 3–5. All r² values are greater than 0.95.

Y-axis Instrument	Sampling System	VARIAnT Campaign	Source	Slope	Slope Standard Error	Intercept (mg/kg fuel)	Intercept Standard Error (mg/kg fuel)
MSS	AEDC	1	CAST	1.02	0.08	−2.3	5.3
MSS	AEDC	1	J85	1.00	0.03	−0.6	1.0
MSS	PW	1	CAST	1.01	0.04	−2.8	2.3
MSS	PW	1	J85	0.99	0.02	−0.6	0.7
LII	AEDC	1	CAST	0.89	0.21	−9.9	13
LII	AEDC	1	J85	0.55	0.02	−1.6	0.5
LII	PW	1	CAST	0.93	0.05	−9.1	3.6
LII	PW	1	J85	0.66	0.01	−0.9	0.2
MSS	AEDC	2	CAST	1.18	0.01	−3.0	37
MSS	AEDC	2	J85	0.94	0.03	0.1	1.2
MSS	MST	2	CAST	1.09	0.04	−12	13
MSS	MST	2	J85	0.86	0.05	0.6	1.8
LII	AEDC	2	CAST	1.18	0.07	−16	23
LII	AEDC	2	J85	0.71	0.04	−0.8	1.4
LII	MST	2	CAST	1.04	0.04	−3.7	11
LII	MST	2	J85	0.71	0.03	0.0	1.1
CAPS	AEDC	2	J85	1.12	0.06	−0.7	1.9
CAPS	MST	2	J85	0.94	0.05	0.7	1.9