Table 4.

Fitting statistics for modified partial least square regression models developed for major (g/kg in dry matter basis ) and trace mineral content (mg/kg in dry matter basis) in ground commercial extruded dry dog food samples ¹.

Item	Outliers	n	Scatter Correction 2	Math Treatment 3	LF	Mean	SD	R2C	SEC	R2CrV	SECrV	RPD
Major minerals
Ca	7	112	D	1881	8	13.32	4.34	0.68	2.47	0.55	2.91	1.49
P	5	114	D	210101	10	9.80	3.14	0.91	0.92	0.72	1.66	1.89
K	6	113	MSC	210101	9	7.03	2.74	0.94	0.69	0.85	1.06	2.58
Na	6	113	ISC	210101	8	5.31	1.60	0.83	0.66	0.60	1.00	1.59
S	5	114	D	2551	9	3.82	1.36	0.96	0.26	0.89	0.45	3.04
Mg	10	109	ISC	1441	9	1.19	0.17	0.78	0.08	0.63	0.11	1.64
Trace minerals
Fe	7	112	WMSC	210101	10	363.84	78.24	0.89	25.89	0.59	49.67	1.58
Zn	9	110	NONE	1441	7	189.46	50.20	0.65	29.89	0.49	35.78	1.40
Al	5	114	SNV	210101	4	149.25	52.70	0.66	30.76	0.52	36.47	1.44
Mn	9	110	SNV	1881	4	74.22	14.97	0.38	11.75	0.20	13.29	1.13
Cu	17	102	WMSC	2551	1	23.72	3.95	0.34	3.22	0.25	3.41	1.16
Sr	10	109	SNV + D	1441	9	16.65	7.44	0.83	3.08	0.72	3.92	1.90
Ba	6	113	MSC	2551	5	5.34	1.93	0.71	1.04	0.47	1.39	1.38
B	9	110	ISC	2551	6	5.06	1.72	0.86	0.64	0.72	0.91	1.90
Cr	11	108	D	0011	1	1.53	0.54	0.23	0.48	0.16	0.49	1.10
Ni	6	113	WMSC	1881	6	1.25	0.36	0.64	0.21	0.44	0.27	1.35
Mo	13	106	NONE	1881	6	0.76	0.24	0.66	0.14	0.50	0.17	1.43
V	5	103	SNV + D	2551	3	0.43	0.21	0.68	0.12	0.53	0.14	1.46
Li	10	109	D	1441	9	0.18	0.07	0.84	0.03	0.74	0.03	1.98

¹ LF = optimal number of model factors; n = number of samples; R²C = R² for calibration; SD = standard deviation; SEC = SE of calibration; R²CrV = R² for the cross-validation; SECrV = SE of cross-validation; RPD = ratio of performance to deviation. ² D = detrend; MSC = multiplicative scatter correction; ISC = inverted scatter correction; WMSC = weighted multiplicative scatter correction; NONE = no correction; SNV = standard normal variate; SNV + D = standard normal variate and detrending. ³ Derivate order, gap (nm), first smoothing, and second smoothing intervals (nm).