Paper-Based Analytical Device for One-Step Detection of Bisphenol-A Using Functionalized Chitosan

Bisphenol-A (BPA) is defined as one of the endocrine disrupting compounds. The accurate and inexpensive colorimetric paper-based analytical devices (PADs) are crucial importance for BPA analysis. In this context, we developed first time a new PAD modified with chitosan sulfamethoxazole (Chitosan-PAD) visual detection in water. was characterized by Fourier-transform infrared spectroscopy, which confirmed its modification functionalized chitosan. A yellow coloration when small volume added to Chitosan-PAD, allowing smartphone detection. This strategy based on specific combination that provides hight selectivity Chitosan-PAD. proposed successfully employed pre-concentration step 0.01 µg mL?1 PBA naked eye using 10-fold preconcentration factor. effectively applied quantification water samples good recoveries. green cost-effective on-site one-step samples.