Table 2.

Points of the Box-Behnken DoE adopted to investigate SPME efficiency of the PDMS fiber with experimental (exp) and calculated (calc) values of the responses: total area of the GC chromatogram (A_TOT), peak areas of ethyl decanoate (A_ED), and 3-methyl-1-butanol (A_MB).

t(min)	NaCl (%)	T(°C)	ATOT 10−6		AED∙10−6		AMB∙10−6
			exp	calc	exp	calc	exp	calc
10	10	40	9.16	8.73	2.66	2.61	0.46	0.49
30	10	40	13.18	12.37	4.98	4.54	0.60	0.49
10	30	40	9.04	9.20	1.47	1.68	1.43	1.40
30	30	40	10.46	10.24	2.24	2.06	1.60	1.40
10	20	30	12.06	11.07	2.99	2.56	0.72	0.70
30	20	50	7.80	7.51	2.46	2.66	1.13	1.19
10	20	50	7.88	7.21	2.37	2.18	1.13	1.19
30	20	30	16.07	16.09	4.42	4.38	0.66	0.70
20	30	50	2.70	2.89	0.16	0.02	1.74	1.77
20	10	30	9.80	10.26	2.41	2.78	0.36	0.37
20	10	50	6.61	7.39	3.34	3.47	0.64	0.60
20	30	30	13.22	13.09	2.71	2.81	0.95	1.03
20	20	40	12.12	12.36	3.18	3.40	0.85	0.95
20	20	40	11.29	12.36	3.15	3.40	0.96	0.95