Development of a Highly Sensitive and Selective Bismuth Optical Sensor Based on (2E,4E)-5-(2,4-Dinitrophenyl Amino)penta-2,4-dienal

Abstract

An optical sensor based on (2E,4E)-5-(2,4-dinitrophenyl amino)penta-2,4-dienal as ionophore has been developed for the determination of bismuth(III) ions in aqueous solutions. This proposed membrane works on the basis of a cation-exchange mechanism and shows a significant absorbance signal change on exposure to 1 M HCl solution of pH 0.0 containing bismuth ions. The optode membrane shows a reproducible and reversible response toward bismuth in the concentration range 0.2 to 60.5 ppm with a detection limit of 0.095 ppm. This sensor has been used for determination of bismuth in real samples.

Keywords:

• Bismuth ion
• neutral ionophore
• optode
• poly(vinyl chlorid)
• UV/vis

The authors are thankful to the postgraduate office of Guilan University for the support of this work.

Notes

^a Obtained from Khazar Lake (Anzali, Iran); numbers in the parentheses show the standard deviations for five replicates.

^b The water obtained from Damash Spring (Rudbar, Iran).

^c The water sample obtained from Sefidrud River (Emamzadeh Hashem, Iran).