Table 1. Efficiency of the Suspension Al-MIL-53-N=SA-Br Sensor in Terms of Accessibility and Sensitivity during the Recognition of the Hg²⁺, Co²⁺, and Al³⁺ Ions^a.

metal ion	pH	Rt (S)	LOD (ppb) (M)	LOQ (ppb) (M)	DR (ppb) (M)
Hg2+	8	30	1.52	4.60	0.09–27.9
			7.56 × 10–9	2.29 × 10–8	4.98 × 10–10 to 1.49 × 10–7
Co2+	8	30	0.60	1.82	0.09–39.8
			1.02 × 10–8	3.10 × 10–8	1.69 × 10–9 to 6.78 × 10–7
Al3+	7	30	2.14	6.50	9.99–49.7
			7.95 × 10–8	2.41 × 10–7	3.71 × 10–7 to 1.85 × 10–6

^aLimit of detection (LOD), limit of quantitation (LOQ), detection range (D_R), and response-time (R_t) by the second (s).