Tokat Gaziosmanpasa University, Chemistry Department, 60250 Tokat, Turkey.
Tokat Gaziosmanpasa University, Chemistry Department, 60250 Tokat, Turkey.
Food Chem. 2019 Jun 30;284:1-7. doi: 10.1016/j.foodchem.2019.01.091. Epub 2019 Jan 20.
A newly synthesized polystyrene-g-polyoleic acid-g-polyethylene glycol graft copolymer (PoleS-PEG) was used as adsorbent in the solid phase microextraction of selenium ions by using electrothermal atomic absorption spectrometry (ETAAS). Neodymium magnet was used for separation of analyte ions. Various analytical parameters such as pH, adsorbent amount, mixing time, eluent solution, sample volume, etc. were optimized. The matrix effects of some cations and anions were also studied. The capacity of the adsorbent was found 11.5 mg g. The preconcentration factor was found to be 50. The detection limit (LOD) and quantification limit (LOQ) were found 6.06 ng L and 20 ng L, respectively. The calibration curve was linear in the range of 0.02-4.0 μg L. Relative standard deviation was found 3.2%. The accuracy of the method was provided by using standard reference materials. The optimized method was successfully applied to natural water and food samples.
一种新合成的聚苯乙烯-聚油酸-聚乙二醇接枝共聚物（PoleS-PEG）被用作电加热原子吸收光谱法（ETAAS）测定硒离子的固相微萃取吸附剂。钕磁铁用于分离分析物离子。优化了各种分析参数，如 pH 值、吸附剂用量、混合时间、洗脱液、样品体积等。还研究了一些阳离子和阴离子的基体效应。该吸附剂的容量为 11.5mg/g。预浓缩因子为 50。检测限（LOD）和定量限（LOQ）分别为 6.06ng/L 和 20ng/L。校准曲线在 0.02-4.0μg/L 范围内呈线性。相对标准偏差为 3.2%。通过使用标准参考物质提供了该方法的准确性。该优化方法已成功应用于天然水和食品样品。
