title: Electrochemical Sensing of Bisphenol A by a Didodecyldimethylammonium Bromide-Modified Expanded Graphite Paste Electrode.
abstract: An electrochemical and sensitive sensing of 2,2-bis(4-hydroxyphenyl) propane [bisphenol A (BPA)] was developed based on a didodecyldimethylammonium bromide-modified expanded graphite paste electrode (DDAB-EGPE). The DDAB-EGPE was prepared by suspending an EGPE in a DDAB aqueous solution, and allowing the DDAB to form a hydrophobic film on the expanded graphite surface. Compared with the EGPE, the DDAB-EGPE showed improved electrochemical response of BPA because of the preconcentration of BPA in DDAB via hydrophobic interaction. Due to the electrocatalytic activity of BPA, a sensor for BPA was constructed based on the DDAB-EGPE. The DDAB-EGPE exhibited a wide linear response to BPA ranging from 6.0 × 10(-8) to 2.0 × 10(-5) mol/L with a detection limit of 7.1 nmol/L at S/N = 3. The designed sensor showed good reproducibility and stability. The proposed sensor was successfully applied to the determination of BPA in three types of real plastic product samples. This sensor presented a simple, rapid, and sensitive platform for the determination of BPA and could become a versatile and powerful tool for food safety.
authors.affiliation: Changzhou University, School of Petrochemical Engineering, Changzhou 213164, Jiangsu, People's Republic of China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Changzhou University, School of Petrochemical Engineering, Changzhou 213164, Jiangsu, People's Republic of China.
authors.forename: Sa
authors.initials: S
authors.lastname: Ma
authors.affiliation: Changzhou University, School of Petrochemical Engineering, Changzhou 213164, Jiangsu, People's Republic of China.
authors.forename: Wenchang
authors.initials: W
authors.lastname: Wang
authors.affiliation: Changzhou University, School of Petrochemical Engineering, Changzhou 213164, Jiangsu, People's Republic of China.
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Chen
mesh_terms: D001559:Benzhydryl Compounds / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D010636:Phenols / Q000032:analysis*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013499:Surface Properties; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D006108:Graphite; D010636:Phenols; D000644:Quaternary Ammonium Compounds; C046112:didodecyldimethylammonium; C006780:bisphenol A; D000098826:Bisphenol A Compounds