“…Instead of 100 mM Cl − solution, samples were prepared using the following ionic constituents: Ca(OH) 2 (10 mM), NaH 2 PO 4 (20 mM), uric acid (100 mM), oxalic acid (0.5 mM), Mg(NO 3 ) 2 (10 mM), KNO 3 (100 mM), NaHCO 3 (100 mM), NaNO 3 (250 mM), Zn(NO 3 ) 2 (20 mM), Na 2 SO 4 (80 mM), NH 3 $H 2 O (70 mM), creatinine (20 mM), glucose (5 mM), urea (10 mM), citric acid (3 mM), NaF (50 mM), KBr (50 mM), and KI (50 mM) were added into PNCs, respectively, and the PL spectra were measured to get Dl. Note that the selection criterion for ionic constituents is according to previous reports [41][42][43][44][45] and the concentration of ionic constituents is higher than the dosage of reports.…”