Fig. 3

(a) Absorption spectra and (b) Absorbances of IBTQ (15 µM) at 588 nm with various analytes (35 ppm); (c) Absorption spectra and (d) absorbances of DMP-BTQ (10 µM) at 580 nm in absence and presence of various analytes (5 ppm).

(a) Absorption spectra and (b) Absorbances of IBTQ (15 µM) at 588 nm with various analytes (35 ppm); (c) Absorption spectra and (d) absorbances of DMP-BTQ (10 µM) at 580 nm in absence and presence of various analytes (5 ppm).