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.
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).