Department of Chemistry, Faculty of Sciences, Erciyes University, 38039 Kayseri, Türkiye; Department of Chemistry, University of Karachi, 75270, Karachi, Pakistan.
Department of Chemistry, Faculty of Sciences, Erciyes University, 38039 Kayseri, Türkiye; Technology Research & Application Center (ERU-TAUM), Erciyes University, 38039 Kayseri, Türkiye; Turkish Academy of Sciences (TUBA), Çankaya, Ankara, Türkiye.
Food Chem. 2025 Jan 15;463(Pt 3):141311. doi: 10.1016/j.foodchem.2024.141311. Epub 2024 Sep 23.
MnAl layered double hydroxide hybrid with magnetic-multiwalled carbon nanotubes was synthesized by a hydrothermal method and used for the extraction of Pb(II) (lead) from spices and water samples in the dispersive solid phase microextraction (dSPμE) technique using FAAS. The as-prepared adsorbent MMWCNTs@MnAl-LDH was characterized by XRD, FTIR, EDX, and SEM techniques. Various analytical parameters were optimized, including pH 8, adsorbent dosage of 5 mg, HNO eluent concentration of 1 mol L, eluent volume of 3 mL, eluent time of 60 s, and sample volume of 20 mL, for quantitative lead recoveries, with an LOD of 0.314 μg L, an LOQ of 1.048 μg L, and PF of 11.53. Under the optimized conditions, the linearity ranges from 0.5 to 500 μg L (R = 0.9997). For the validation test of the established dSPμE procedure, Certified reference materials (CRMs) were used, yielding satisfactory recovery results ranging from 97.8 to 102.7 %. The method was applied to determine lead in turmeric, tap water, and industrial water samples.
采用水热法合成了 MnAl 层状双氢氧化物与磁性多壁碳纳米管的复合材料，并将其用于分散固相微萃取（dSPμE）技术，结合火焰原子吸收光谱法（FAAS）从香料和水样中萃取 Pb(II)（铅）。采用 XRD、FTIR、EDX 和 SEM 技术对所制备的吸附剂 MMWCNTs@MnAl-LDH 进行了表征。对各种分析参数进行了优化，包括 pH 8、吸附剂用量 5 mg、HNO3 洗脱液浓度 1 mol·L-1、洗脱液体积 3 mL、洗脱时间 60 s 和样品体积 20 mL，以实现定量铅的回收，其检出限为 0.314 μg·L-1、定量限为 1.048 μg·L-1、PF 为 11.53。在优化条件下，线性范围为 0.5 至 500 μg·L-1（R=0.9997）。为了验证建立的 dSPμE 程序的有效性，使用了认证参考物质（CRMs），得到了令人满意的回收率，范围在 97.8%至 102.7%之间。该方法应用于测定姜黄、自来水和工业水样中的铅。
