Azo calix[4]arene based neodymium(III)-selective PVC membrane sensor.
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 4.0×10(-8) to 1.0×10(-1) mol L(-1) with a detection limit 1.0×10(-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.
Department of Chemistry, School of Sciences, Gujarat University, Navrangpura, Ahmedabad, Gujarat, India. shobhanamenon07@gmail.com
Shobhana K
SK
Menon
Nishith R
NR
Modi
Bhargav
B
Patel
Manishkumar B
MB
Patel
D001391:Azo Compounds / Q000737:chemistry*; D047250:Calixarenes / Q000737:chemistry*; D004566:Electrodes; D004784:Environmental Monitoring / Q000379:methods; D008567:Membranes, Artificial; D015394:Molecular Structure; D009354:Neodymium / Q000032:analysis* / Q000737:chemistry*; D011143:Polyvinyl Chloride / Q000737:chemistry*; D014881:Water Supply / Q000032:analysis
D001391:Azo Compounds; D008567:Membranes, Artificial; D047250:Calixarenes; D009354:Neodymium; D011143:Polyvinyl Chloride