Article ID Journal Published Year Pages File Type
7147514 Sensors and Actuators B: Chemical 2014 35 Pages PDF
Abstract
A new dimethyliminocinnamyl linked rhodamine (rhodamine-dimethyliminocinnamyl) (RC) has been explored as an electro-active material to prepare voltammetric and potentiometric sensors for the quantification of Fe (II) ions. In voltammetry, RC shows two anodic peaks at 0.4 V and 0.9 V vs. Ag/Ag+ potential which get quenched and a new cathodic peak appeared at more negative potential (−0.5 V) on addition of Fe (II) which is due to the reduction Fe (II) complex formed with rhodamine dimethyliminocinnamyl. Voltammetric sensor can work within the concentration range of 2.0 × 10−6 to 3.0 × 10−4 M with detection limit of 1.6 × 10−7 M. In potentiometric mode, constructed PVC based solid contact coated graphite electrode (CGE) showed Nernstian slope of 29.4 mV/decade of Fe (II) concentration over a linear range of 1.0 × 10−1 to 1.0 × 10−7 M with detection limit of 7.43 × 10−8 M. In the proposed sensors, negligible interference from alkali, alkaline and transition metal ions have been observed and show outstanding analytical performance with different type of sample matrices.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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