Zengin, HacıbayramGürkan, Ramazan2023-06-192023-06-198 July 2020889-1575/https://hdl.handle.net/20.500.12418/13746In this study, a separation/pre-concentration procedure, ultrasound assisted-cloud point extraction with modified 2-aminobenzimidazole (2-ABzI), was developed for the extraction of trace Hg2+ and CH3Hg+ and from vinegar samples- modified copolymer coupled with Hg-binding chelator, 2-ABzI. The imidic copolymer was characterized, and used for detection of the enriched Hg species by spectrophotometer at 332 nm. The method is based on their pH-induced charge transfer sensitive complexation with copolymer matrix via 2-AmBzI moiety at pH 6.0 and 4.5, and their extraction into the mixed micellar phase of the mixed non-ionic/ionic surfactants as extractant/sensitivity enhancer. The variables influencing the extraction efficiency were optimized. From preconcentration of 25-mL sample, with a changing calibration sensitivity and pre-concentration factor of 62.5, a good rectilinear relationship between absorbance and concentrations of Hg species in ranges of 1–15, 15–150 μg L... 1 was obtained. The detection limits are 0.30 and 0.31 μg L... 1, respectively. Its precision/accuracy were in range of 3.1–7.6 % and 90.5–96 % after spiking (n: 5, for measurements of 5, 25 and 100 μg L in same day and three consecutive days). The matrix effect was also studied (n: 3, 100 μg L... 1). The method is simple, costeffective, fast, accurate, safe, highly stable and selective, which has successfully been applied to the speciation of mercury in vinegar.In this study, a separation/pre-concentration procedure, ultrasound assisted-cloud point extraction with modified 2-aminobenzimidazole (2-ABzI), was developed for the extraction of trace Hg2+ and CH3Hg+ and from vinegar samples- modified copolymer coupled with Hg-binding chelator, 2-ABzI. The imidic copolymer was characterized, and used for detection of the enriched Hg species by spectrophotometer at 332 nm. The method is based on their pH-induced charge transfer sensitive complexation with copolymer matrix via 2-AmBzI moiety at pH 6.0 and 4.5, and their extraction into the mixed micellar phase of the mixed non-ionic/ionic surfactants as extractant/sensitivity enhancer. The variables influencing the extraction efficiency were optimized. From preconcentration of 25-mL sample, with a changing calibration sensitivity and pre-concentration factor of 62.5, a good rectilinear relationship between absorbance and concentrations of Hg species in ranges of 1–15, 15–150 μg 1 was obtained. The detection limits are 0.30 and 0.31 μg L... 1, respectively. Its precision/accuracy were in range of 3.1–7.6 % and 90.5–96 % after spiking (n: 5, for measurements of 5, 25 and 100 μg L.... 1 in same day and three consecutive days). The matrix effect was also studied (n: 3, 100 μg L... 1). The method is simple, costeffective, fast, accurate, safe, highly stable and selective, which has successfully been applied to the speciation of mercury in vinegar.en10.1016/j.jfca.2022.104729info:eu-repo/semantics/openAccessHg2+/CH3Hg+ UA-CPE 2-ABzI-poly(SMAnh) 2-Aminobenzimidazole Vinegar UV–VIS spectrophotometryHg2+/CH3Hg+ UA-CPE 2-ABzI-poly(SMAnh) 2-Aminobenzimidazole Vinegar UV–VIS spectrophotometryArticle1141047291047292-s2.0-85134768450Q1WOS:000835489900017Q2