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PPb level monitoring of lanthanium by a novel PCV-membrane sensor based on 4-methyl-2-hydrazinobenzothiazole by Mohammad Reza Ganjali; Parviz Norouzi; Leila Shamsolahrari; Abbas Ahmadi is a Engineering article available to read on EtoBox.

What is PPb level monitoring of lanthanium by a novel PCV-membrane sensor based on 4-methyl-2-hydrazinobenzothiazole about?

A novel poly(vinyl chloride) (PVC)-based membrane sensor for lanthanum ions was prepared by employing 4-methyl-2hydrazinobenzothiazole (MHBT) as an ionophore, sodium tetraphenyl borate (NaTPB) as an anion excluder, and dibutylphthalate (DBP), acetophenon (AP) and nitrobenzene (NB) as plasticizing solvent mediators and investigated as a selective membrane sensor. The best performance was observed with a membrane having a composition of PVC:MHBT:DBP:NaTPB = 30:6:61:3 in the concentration range of 1.0 × 10 -7 to 1.0 × 10 -1 M La 3+ . The sensor exhibited a Nernstian slope of 19.8 mV per decade in La 3+ activity. The detection limit of the sensor was 2.5 × 10 -8 M (∼3.8 ppb). The proposed electrode showed the excellent discriminating ability toward La 3+ ions with regard to most alkali, alkaline earth, transition and heavy metal ions. It was successfully applied to the determination of lanthanum in two mouth wash preparations. The sensor was also used as an indicator electrode in the potentiometric titration of lanthanum ions with an EDTA solution.

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Author

Mohammad Reza Ganjali; Parviz Norouzi; Leila Shamsolahrari; Abbas Ahmadi

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0925-4005)

Published

2006

Language

EN

Field

Engineering (Physical Sciences)