Figure - PMC

Skip to main content

View full-text article in PMC

. Author manuscript; available in PMC: 2015 Sep 16.

Published in final edited form as: Anal Chim Acta. 2014 Jun 26;843:89–96. doi: 10.1016/j.aca.2014.06.041

Fig. 3 — Absorption spectra of nitrite optical sensing films prepared with a PVC-NPOE cocktail containing (A) 20 mmol/kg ionophore, 10 mmol/kg chromoionophore I; and (B) 20 mmol/kg ionophore, 10 mmol/kg chromoionophore VI and 10 mmol/kg TDMACl, measured at varying nitrite levels, ranging from 0.1 μM to 0.1 M, in 50 mM phosphate buffer solutions (pH 4.5).

Fig. 3 — Absorption spectra of nitrite optical sensing films prepared with a PVC-NPOE cocktail containing (A) 20 mmol/kg ionophore, 10 mmol/kg chromoionophore I; and (B) 20 mmol/kg ionophore, 10 mmol/kg chromoionophore VI and 10 mmol/kg TDMACl, measured at varying nitrite levels, ranging from 0.1 μM to 0.1 M, in 50 mM phosphate buffer solutions (pH 4.5).