Rapid and Simultaneous Prediction of Eight Diesel Quality Parameters through ATR-FTIR Analysis

Table 5

Comparison between mean center/autoscale and multivariate filters.

	Mean center/autoscale					Multivariate filter
	Number of LVs	RMSEP	r (val)	X-block variance (%)	y-block variance (%)	Number of LVs	RMSEP	r (val)	X-block variance (%)	y-block variance (%)
Density	12	0.5	0.9959	99.76	99.17	9	0.5	0.9957	99.99	99.14
Flash point	12	2.3	0.8735	99.72	83.78	8	2.3	0.8761	99.99	83.20
Total sulfur	7	0.013	0.9773	99.31	94.52	6	0.013	0.9806	99.99	95.05
T10	11	4.3	0.9192	99.69	86.90	9	4.2	0.9224	99.99	88.04
T50	7	3.5	0.9432	99.43	86.18	6	3.2	0.9508	89.92	89.47
T85	11	4.8	0.7909	99.67	70.31	8	4.7	0.7991	99.98	66.18
Cetane index	10	0.6	0.9084	99.63	83.02	9	0.6	0.9103	99.99	83.78
Biodiesel content	10	0.2	0.9337	99.71	88.50	5	0.2	0.9302	97.13	89.85

The models for density, cetane index, and biodiesel content were preprocessed using mean centering.