School of Public Health, North China University of Science and Technology, Tangshan 063210, Hebei, China.
College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, Hubei, China.
J Hazard Mater. 2022 Jul 5;433:128754. doi: 10.1016/j.jhazmat.2022.128754. Epub 2022 Mar 23.
A novel monodispersed CaCO@hydroxyapatite/magnetite microsphere (CaCO @HAP/FeO) was prepared via an in-situ growth strategy, and applied as an adsorbent for efficient and selective adsorption of benzoylurea insecticides (BUs) in various tea beverages samples. The sorbent exhibited uniformity in particle size, good mono-dispersibility and excellent solvent stability. The adsorption equilibrium of BUs (100 ng/mL) in 10 mL of tea beverages samples was achieved on 20 mg of CaCO @HAP/FeO within 10 min. The adsorption followed pseudo-second-order kinetics and Langmuir models and the maximum adsorption capacities of 131.9-161.3 mg/g were accomplished via hydrophobic interactions, hydrogen bonding, and the affinity of F atom and Ca. Coupled with high performance liquid chromatography, the method offered wide linear ranges of 0.8-1000 ng/mL with correlation coefficients (r) ≥ 0.9995, low limits of detection of 0.2-0.3 ng/mL and large enrichment factors of 75.7-102. The recoveries ranged from 75.7%- 102% with intra- and inter-day precisions of 1.9%- 9.3% and 1.6%- 11.8%, respectively. In addition, CaCO @HAP/FeO could be easily regenerated and reused at least 10 times with no significant loss of recovery. These results revealed an alternative strategy for fast and convenient determination of BUs in tea beverages samples and proved the great feasibility of CaCO @HAP/FeO in the application for the selective adsorption of BUs.
一种新型的单分散 CaCO@羟基磷灰石/磁铁矿微球（CaCO@HAP/FeO）是通过原位生长策略制备的，并被用作一种吸附剂，用于在各种茶饮料样品中高效和选择性地吸附苯甲酰脲类杀虫剂（BUs）。该吸附剂在颗粒尺寸上具有均匀性，良好的单分散性和优异的溶剂稳定性。在 10 分钟内，20mg 的 CaCO@HAP/FeO 可以在 10mL 的茶饮料样品中达到对 100ng/mL 的 BUs 的吸附平衡。吸附遵循拟二级动力学和 Langmuir 模型，通过疏水相互作用、氢键和 F 原子和 Ca 的亲和力实现了 131.9-161.3mg/g 的最大吸附容量。结合高效液相色谱法，该方法提供了 0.8-1000ng/mL 的宽线性范围，相关系数（r）≥0.9995，检测限低至 0.2-0.3ng/mL，富集因子高达 75.7-102.7。回收率范围为 75.7%-102%，日内和日间精密度分别为 1.9%-9.3%和 1.6%-11.8%。此外，CaCO@HAP/FeO 可以很容易地再生和重复使用至少 10 次，而回收率没有明显损失。这些结果为快速方便地测定茶饮料样品中的 BUs 提供了一种替代策略，并证明了 CaCO@HAP/FeO 在选择性吸附 BUs 方面的应用具有很大的可行性。
