Abstract
N-[2-[4-[[[(Cyclohexylamino)carbonyl]amino]sulfonyl]phenyl]ethyl]-5-methyl pyrazine carboxamide (glipizid) was explored as an electro-active material for preparing a polymeric membrane-based sensor selective to samarium ions. The membrane incorporated 30% poly(vinyl chloride) (PVC), 53% benzyl acetate (BA), 11% glipizid and 6% sodium tetraphenyl borate. When coated on the surface of a graphite electrode, it exhibits Nernstian responses in the concentration range of 1.0 × 10−5 to 1.0 × 10−10 M, with a detection limit of 8.0 × 10−11 M samarium. The electrode shows high selectivity towards samarium over several cations (alkali, alkaline earth, transition and heavy metal ions), and specially lanthanide ions. The proposed sensor has a very short response time (< 15 s), and can be used in a wide pH range for at least ten weeks. It was used as an indicator electrode in potentiometric titration of Sm(III) ions with an EDTA solution, and for determination of samarium in binary and ternary mixtures.
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Reza Ganjali, M., Rezapour, M., Reza Pourjavid, M. et al. ppt Level Detection of Samarium(III) with a Coated Graphite Sensor Based on an Antibiotic. ANAL. SCI. 20, 1007–1011 (2004). https://doi.org/10.2116/analsci.20.1007
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DOI: https://doi.org/10.2116/analsci.20.1007