Azo calix[4]arene based neodymium(III)-selective PVC membrane sensor

作者：Menon Shobhana K^*; Modi Nishith R; Patel Bhargav; Patel Manishkumar B

来源：Talanta, 2011, 83(5): 1329-1334.

DOI：10.1016/j.talanta.2010.10.027

• Azo calix[4]arene
• Ion selective electrode
• Neodymium
• PVC-membrane

We found that the PVC membrane, containing azo calix[4]arene is a suitable ionophore, exhibited a Nernstian response for neodymium (Nd(3+)) ions (with slope of 19.8 +/- 0.2 mV decade(-1) for the triply charged ion) over a wide linear range of 4.0 x 10(-8) to 1.0 x 10(-1) mol L(-1) with a detection limit 1.0 x 10(-8) mol L(-1), a relatively fast response time, in the whole concentration range (<10 s), and a considerable life time at least for four months in the pH range of 4.0-8.0. Furthermore, the electrode revealed high selectivity with respect to all the common alkali, alkaline earth, transition and heavy metal ions, including the members of the lanthanide family other than Nd(3+). Concerning its applications, it was effectively employed for the determination of neodymium ions in industrial waste water as well as in lake water.

• 出版日期2011-2-15