Table 2.

Analytical parameters for the Ph30, Ph40, and P50 sensing elements in the presence of n-hexane deduced from the time-response curves at 288, 298, 308, and 323 K, including the second- (a) and first-order (b) coefficients, quadratic regression coefficients (R²), coefficients of variation (COV) and limits of detection (LoD).

T	a	b	R2	COV	LoD
(K)	(10−2 nm−2 mM−2)	(10−2 nm−1 mM−1)		(%)	(mM)	(hPa)
Ph30
288	0.100 ± 0.084	0.187 ± 0.028	0.993	1.11–4.7	0.269	6.43
298	0.020 ± 0.002	0.169 ± 0.007	0.999	0.99–3.99	0.309	7.02
308	0.011 ± 0.002	0.120 ± 0.007	1.000	1.23–7.95	0.428	10.9
323	−0.002 ± 0.002	0.084 ± 0.006	0.998	1.73–8.09	0.729	19.6
Ph40
288	0.237 ± 0.012	−0.058 ± 0.004	0.999	0.21–5.32	0.573	13.7
298	0.061 ± 0.004	0.078 ± 0.012	0.997	1.05–7.88	0.418	10.4
308	0.020 ± 0.002	0.094 ± 0.006	0.999	0.94–9.04	0.406	10.4
323	0.000 ± 0.003	0.080 ± 0.010	0.994	1.29–7.08	0.703	18.8
Ph50
288	0.191 ± 0.09	0.172 ± 0.027	0.998	0.93–8.45	0.355	8.5
298	0.070 ± 0.004	0.155 ± 0.011	0.997	0.977–6.69	0.457	11.3
308	0.022 ± 0.004	0.111 ± 0.013	0.995	2.65–6.14	0.631	14.3
323	−0.001 ± 0.014	0.110 ± 0.019	0.985	2.32–7.28	0.678	18.2