Authors: Masoud Fouladgar, Ali A Ensafi

Publication date: 2009/12

Journal name : Sensor Letters

Volume: 7

Pages: 1135-1140

Publisher: American Scientific Publishers

Abstract: A novel, fast and sensitive optical chemical sensor has been prepared for the
determination of samarium (III) in aqueous solutions using 4-(5-bromo-2-pyridylazo)-N, N-
diethyl-3-hydroxyanilin (Br-PADAP) as an ionophore in the plasticized PVC membrane. The
complex formation between Sm (III) and Br-PADAP caused a new peak in the absorption
spectra at 525 nm. The prepared optode had a linear dynamic range for 2.6× 10− 6 to 2.6×
10− 4 mol L− 1 samarium (III) concentration. The lower and upper detection limits of the ...