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Development and Application of a Rapid Colorimetric Sensor Based on BTSIXO-Fe³⁺ Conjugate for Quantification of Bisphenol A in Environmental and Biological Samples

This study introduces a highly efficient, rapid, and selective colorimetric sensor for the detection of bisphenol A (BPA) using a newly synthesized chromophore, 3′,6′-bis(diethylamino)-2-((3,4,5-trimethylbenzylidene)amino)spiro-3-one (BTSIXO), conjugated with Fe³⁺ ions. The…