Ninhydrin Based Chemo-Sensor for Simultaneous Detection of Co (II) and Cu (II) in Aqueous Medium

Author(s): Prabhu SP, Kukalkar TS, Heredia JAA, Kundu P and Gururaja GN

Colorimetric sensor derived from ninhydrin is presented for the selective visual detection of heavy (toxic) metals Co (II) and Cu (II). The colour complex formed is stable at a wide range of pH. The detection limit of this colourimetric sensor in water is comparatively lower and was exploited to prepare optical solid sensor. Filter paper dip sticks developed was employed as a sensor to detect the presence and to distinguish between Co (II) and Cu (II).

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