Polymeric membrane neodymium(III)-selective electrode based on 11,13-diaza-4,7,12-trioxo-2(3),8(9)-dibenzoyl- cyclotetridecane-1,11-diene

Chandra, Sulekh; Singh, Dev Raj

doi:10.1016/j.msea.2008.10.014

Cited by 28 publications

References 25 publications

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Highly Selective Nd(III) Sensors: Novel Macrocyclic Compounds for Potentiometric Determination of Neodymium

Singh

Jain

2010

Electroanalysis

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Conductometric studies on the complexation properties of two newly synthesized lariat ethers viz 1,5-di(cyanoethane)-2,4 : 7,8 : 13,14-tribenzo-1,5-diaza-9,12-dioxacyclopentadeca-2,7,13-triene (L 1 ) and 1,5-di(cyanoethane)-2,3,4-pyridine-7,8 : 13,14-dibenzo-1,3,5-triaza-9,12-dioxa cyclopentadeca-2,7,13-triene (L 2 ) towards various metal ions in acetonitrile solutions revealed the formation of 1 : 1 ligand metal complexation. These compounds were explored as neutral ionophores for the fabrication of Nd 3þ selective and sensitive membrane coated graphite electrodes (CGEs). Among all the electrodes prepared, CGEs with membrane composition L 1 (5%) : NaTPB(3%) : NPOE (57%) : PVC (35%) and L 2 (5%) : NaTPB(3%) : NPOE (53%) : PVC (39%) showed best performance. Both the electrodes showed Nernstian response towards Nd 3þ ions over a wide concentration range with detection limits 3.8 Â 10 À8 mol L À1 and 1.6 Â 10 À8 mol L À1 respectively. These electrodes showed a fast response time of < 15 s and could be used over a period of three months without significant divergence in their characteristics. The proposed electrodes revealed very good selectivity for Nd 3þ ions over several ions. However, higher concentration of Co 2þ , La 3þ , Pr 3þ and Yb 3þ caused some interference. The potentiometric response of these electrodes was excellent in the range of pH 3.5 to 7.6 and they could tolerate up to 20% (v/v) nonaqueous media in the test solutions. These electrodes were used successfully as indicator electrode in the potentiometric titration of Nd 3þ against EDTA and also in the quantitative determination of Nd 3þ ions from binary mixtures and water samples.

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