Altunay Nail, Hazer Baki, Lanjwani Muhammad Farooque, Tuzen Mustafa
Department of Chemistry, Faculty of Science, Sivas Cumhuriyet University, 58140 Sivas, Turkey.
Department of Aircraft Airframe Engine Maintenance, Kapadokya University, 50420 Nevşehir, Turkey.
Foods. 2023 Sep 28;12(19):3620. doi: 10.3390/foods12193620.
Cadmium (Cd) is a very toxic and carcinogenic heavy metal even at low levels and it is naturally present in water as well as in food. A new polyvinyl benzyl xanthate (PvbXa) was synthesized and used as a new adsorbent in this work. It contains pendant sulfide groups on the main polystyryl chain. Using this new adsorbent, PvbXa, a vortex-assisted dispersive solid-phase microextraction (VA-dSPµE) procedure was developed for the determination of cadmium from food and water samples via flame atomic absorption spectrophotometry (FAAS). Synthesized PvbXa was characterized by H Nuclear magnetic resonance (NMR) Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), and X-ray Photoelectron Spectroscopy (XPS). The different parameters of pH, sample volume, mixing type and time, sorbent amount, and eluent time were optimized using standard analytical methods. The optimized method for assessment of Cd in food and water samples shows good reliability. The optimum conditions were found to be a 0.20-150 µg L linear range, 0.06 µg L LOD, 0.20 µg L LOQ, 4.3 RSD %, and a preconcentration factor of 160. The statistically experimental variables were utilized using a central composite design (CCD). The present method is a low-cost, simple, sensitive, and very effective tool for the recovery of Cd.
镉（Cd）是一种毒性很强的致癌重金属，即使含量很低也具有危害性，它天然存在于水和食物中。本研究合成了一种新型聚乙烯苄基黄原酸盐（PvbXa）并将其用作新型吸附剂。它在聚苯乙烯主链上含有侧链硫醚基团。利用这种新型吸附剂PvbXa，开发了一种涡旋辅助分散固相微萃取（VA-dSPµE）方法，通过火焰原子吸收光谱法（FAAS）测定食品和水样中的镉。通过氢核磁共振（NMR）光谱、傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对合成的PvbXa进行了表征。采用标准分析方法对pH值、样品体积、混合类型和时间、吸附剂用量以及洗脱时间等不同参数进行了优化。用于评估食品和水样中镉的优化方法具有良好的可靠性。最佳条件为线性范围0.20 - 150 µg/L，检测限0.06 µg/L，定量限0.20 µg/L，相对标准偏差4.3%，预富集因子为160。采用中心复合设计（CCD）对统计实验变量进行了分析。本方法是一种低成本、简单、灵敏且非常有效的镉回收工具。
