State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Tokat Gaziosmanpaşa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkiye; Institute of Chemistry, Shah Abdul Latif University, Khairpur Mir's, 66020 Sindh, Pakistan.
Tokat Gaziosmanpaşa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkiye.
Food Chem. 2024 Jul 15;446:138871. doi: 10.1016/j.foodchem.2024.138871. Epub 2024 Feb 28.
A new graft copolymer composed of polystyrene and polylinoleic acid (PLinas) with the sodium salt of iminodiacetate (Ida) was synthesized and used as an adsorbent. The vortex-assisted dispersive solid-phase micro-extraction (VA-dSPµE) method was used for the extraction and pre-concentration of chromium. Multivariate methodologies, such as factorial design and 3D surface plots, were applied for screening and optimizing effective extraction parameters. The influence of diverse analytical parameters, such as pH, sample volume, and interfering ions, on the extraction of chromium was studied. The calibration standard curve exhibited a linear range from 0.01 to 0.50 μg L. The relative standard deviation and limit of detection were found to be 1.65 % and 0.003 μg L, respectively. Extraction recoveries were found in the range of 96 to 99 % by using certified reference materials (CRMs). The adsorbent capacity of PLinas-Ida was found to be 112 mg g. The VA-dSPµE method demonstrated its effectiveness in the pre-concentration and determination of chromium within samples of foodstuffs by graphite furnace-atomic absorption spectrometry (GF-AAS).
一种由聚苯乙烯和聚亚油酸（PLinas）与亚氨基二乙酸（Ida）的钠盐组成的新型接枝共聚物被合成并用作吸附剂。涡旋辅助分散固相微萃取（VA-dSPµE）方法用于铬的萃取和预浓缩。多元方法，如析因设计和 3D 表面图，被应用于筛选和优化有效的萃取参数。研究了不同分析参数，如 pH 值、样品体积和干扰离子，对铬萃取的影响。校准标准曲线显示出从 0.01 到 0.50 μg L 的线性范围。相对标准偏差和检测限分别为 1.65%和 0.003 μg L。使用认证参考材料（CRMs）发现萃取回收率在 96 到 99%之间。PLinas-Ida 的吸附容量被发现为 112 mg g。VA-dSPµE 方法通过石墨炉原子吸收光谱法（GF-AAS）证明了其在食品样品中铬的预浓缩和测定中的有效性。
