A simple colorimetric sensor for the recognition of copper ions based on safranin impregnated poly vinyl alcohol hydrogels
Source abstract
Abstract
Abstract A novel, simple, disposable and low-cost chemosensor has been developed based on safranin impregnated PVA hydrogel for the visual recognition of copper ions (Cu2+). Here, the Cu2+ recognition is based on a color change of safranin from basic red to yellow with the blue shift in the absorption peak owing to the formation of complex between Cu2+ and safranin. Selectivity response of safranin was tested towards different other metal ions and it exhibit elevated selectivity for the Cu2+ among the tested metal ions. The LOD of the chemosensor probe was calculated and established to be 8.6 × 10−6 M ±0.004 with the linear co-efficient of R2 = 0.986. For the practical applications, portable sensors were fabricated by incorporating safranin into PVA hydrogel matrix and studied the sensing of Cu2+. Under optimized conditions, it reveals similar characteristics with respect to sensitivity and stability. Results proved that, this chemosensor exhibits good sensitivity, selectivity, reproducibility, quickness and this could be explored for the real time monitoring of Cu2+ in ecological assays.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Molecular Sensors and Ion Detection · Electrochemical sensors and biosensors · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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