A dual-ion imprinted polymer embedded in sol-gel matrix for the ultra trace simultaneous analysis of cadmium and copper.
In simultaneous determination of group of elements, there are inter-metallic interactions which result in a non-linear relationship between the peak current and ionic concentration for each of the element, at bare (unmodified) electrode. To resolve this problem, we have resorted, for the first time, to develop a modified pencil graphite electrode using a typical ion imprinted polymer network (dual-ion imprinted polymer embedded in sol-gel matrix (inorganic-organic hybrid nano-material)) for the simultaneous analysis of a binary mixture of Cd(II) and Cu(II) ions, without any complication of inter-metallic interactions and competitive bindings, in real samples. The adequate resolution of differential pulse anodic stripping voltammetry peaks by 725 mV (cf, 615 mV with unmodified electrode), without any cross-reactivity and the stringent detection limits as low as, 0.050 and 0.034 ng mL(-1) (S/N=3) for Cd(II) and Cu(II) ions, respectively by the proposed sensor can be considered useful for the primitive diagnosis of several chronic diseases in clinical settings.
Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India. Electronic address: prof.bbpd@yahoo.com.
Bhim
B
Bali Prasad
Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India.
Darshika
D
Jauhari
Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India.
Archana
A
Verma
D000818:Animals; D002104:Cadmium / Q000032:analysis* / Q000097:blood; D002417:Cattle; D003300:Copper / Q000032:analysis* / Q000097:blood; D055664:Electrochemical Techniques / Q000379:methods; D006801:Humans; D060106:Lakes / Q000032:analysis; D057230:Limit of Detection; D008892:Milk / Q000737:chemistry; D054802:Molecular Imprinting / Q000379:methods*; D044367:Phase Transition; D011108:Polymers / Q000737:chemistry
D011108:Polymers; D002104:Cadmium; D003300:Copper
Differential pulse anodic stripping voltammetry; Dual-template ion imprinted polymer; Metal ions; Nano-film; Simultaneous ultra trace analysis; Sol–gel