School of Pharmacy, Shenyang Key Laboratory of Functional Drug Carrier Materials, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang 110016, PR China.
School of Pharmacy, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, 59Cangwu Road, Lianyungang 222001, PR China.
Food Chem. 2021 Oct 30;360:130023. doi: 10.1016/j.foodchem.2021.130023. Epub 2021 May 6.
A novel dispersive magnetic solid phase microextraction (d-MSPE) method using ionic liquid-coated amino silanized magnetic graphene oxide (MGO@SiO-APTES-IL) as adsorbent has been established for enriching and extracting lead(II), copper(II) and cadmium(II) in shellfish samples. The novel nanocomposite was proved synthesized successfully by various characterization technologies. Parameters that could affect the recoveries of target ions were investigated and optimized focusing on adsorption and desorption using Box-Behnken design of response surface methodology (BBD-RSM). The limits of detection (LODs) for three target heavy metal ions were 2.42, 3.36, 3.75 ng L, respectively. Additionally, the maximum adsorption capacities of the nanocomposite for target ions were 251.23, 138.51, 159.31 mg g at 298 K, respectively, the nanoadsorbent can be regenerated without significant adsorption capacities loss for four times. These observations revealed that the novel nanocomposite can be used as an excellent adsorbent for separation and preconcentration of the target ions.
建立了一种新型的分散固相微萃取（d-MSPE）方法，使用离子液体包覆的氨基硅烷化磁性氧化石墨烯（MGO@SiO-APTES-IL）作为吸附剂，用于贝类样品中铅（II）、铜（II）和镉（II）的富集和提取。通过各种表征技术证明了新型纳米复合材料的成功合成。采用响应面法（BBD-RSM）的 Box-Behnken 设计，研究并优化了吸附和解吸过程中影响目标离子回收率的参数。三种目标重金属离子的检出限（LOD）分别为 2.42、3.36 和 3.75 ng L。此外，在 298 K 时，纳米复合材料对目标离子的最大吸附容量分别为 251.23、138.51 和 159.31 mg g，纳米吸附剂可在不损失显著吸附容量的情况下再生 4 次。这些观察结果表明，新型纳米复合材料可用作分离和浓缩目标离子的优良吸附剂。
