Novel neodymium(III) membrane sensor based on N-(2-Furylmethylene)pyridine-2,6-diamine

Abstract

Através de nossos estudos, encontramos que N-(2-furilmetileno) piridina-2,6-diamina (FPD) pode ser usado como um excelente ionóforo na construção de um novo sensor baseado em membrana de poli(vinil cloreto) (PVC). Uma composição para a membrana, de 33% de PVC, 59% de nitrobenzeno (NB), 6% de FPD e 2% de borato de potássio tetrakis (p-clorofenil) (KTpClPB), levou a ótimos resultados. A seletividade do sensor frente a Nd(III), é relativamente boa em comparação com um grande número de íons de lantanídeos, tais como lantânio, cério, gadolínio, samário, térbio, európio, disprósio, e itérbio. A resposta do sensor é Nernstiniana (com inclinação de 19,6 ± 0,3 mV per década para íon carregado triplamente) em um largo intervalo de concentração (1,0 ×10-5 a 1,0 × 10-2 mol L-1) com limite de detecção de 7,0 × 10-6 mol L-1 , tempo de resposta relativamente rápido em todo intervalo de concentração (<15 s), e um tempo de vida considerável, de no mínimo seis semanas no intervalo de pH de 4,0 a 8,0. We found that N-(2-furylmethylene) pyridine-2,6-diamine (FPD) can be used as an excellent ionophore in the construction of a novel neodymium(III) poly(vinyl chloride) (PVC)-based membrane sensor. A membrane composition of 33% poly (vinyl chloride), 59% nitrobenzene (NB), 6% FPD, and 2% potassium tetrakis (p-chlorophenyl) borate (KTpClPB), led to the optimum results. The Nd(III)-selectivity of the sensor, is relatively good in comparison to a large number of lanthanide metal ions, such as lanthanum, cerium, gadolinium, samarium, terbium, europium, dysprosium, and ytterbium ions. The sensor response is Nernstian (with slope of 19.6±0.3 mV per decade for the triply charged ion) over a wide concentration range (1.0 ×10-5 to 1.0 × 10-2 mol L-1) with a detection limit of 7.0 × 10-6 mol L-1 , a relatively fast response time, in the whole concentration range (<15 s), and a considerable life time of at least six weeks in the pH range of 4.0-8.0.

Comparative studies of neodymium (III)-selective PVC membrane sensors

“…Hence, monitoring neodymium concentration is the subject of interest in the last decade. A number of methods have been reported to determine trace amount of neodymium in different samples such as ICP-MS [2], ICP-AES [3], gravimetric deter-mination [4], isotope dilution mass spectroscopy [5,6], absorption spectra of 4f electron transitions [7] and finally, design and preparation of electrochemical sensors for neodymium (III) [8][9][10][11]. Most of these methods are time consuming and require expertise and costly instrumentations.…”

Development of Pr(III) Selective Electrode Using 1,6,7,12‐Tetramine‐2,5,8,11‐tetraoxo‐1(12),6(7)‐di(biphenyl)‐dodecane (TATODBDD) as a Neutral Carrier

“…Proposed electrode was compared with previously best reported Pr(III)-selective electrodes 23,24 in terms of working concentration range, response time and pH range. Developed electrode shows better selectivity as compared to previously reported Pr(III)-selective electrode (Table 4).…”

One decade of research on ion-selective electrodes in Iran (1996–2006)

“…The other sensors in this group include Nd 3+ PMEs [164][165][166], with major interfering ions of Yb 3+ , Ce 3+ , Gd 3+ , La 3+ , Sm 3+ , and the minimum detection limit of 7.9 × 10 -7 . There have also been reports on Sm 3+ sensors based on ionophores with N, and S donor atoms like the other lanthanide and transition metal ion sensors.…”