AbstractA magnetic sorbent was fabricated by covalently grafting hyperbranched polyamidoamine onto the surface of Fe3O4 nanoparticles. The sorbent was used in the magnetic solid-phase extraction (MSPE) of benzoylurea insecticides (BUs) from environmental water samples. It is perceived that hydrogen bonding interactions and hydrophobic interactions are the main mechanisms for the adsorption of BUs. The sorbent was characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, elemental analysis, Brunauer-Emmett-Teller measurement, X-ray photoelectron spectroscopy, vibrating sample magnetometry and X-ray diffraction. Various experimental parameters affecting the MSPE were optimized. Following elution with acetonitrile, the BUs were quantified by HPLC with diode array detection. The method based has a wide linear response range (2.5–500.0 ng mL−1), satisfactory coefficient of determination (0.9922–0.9976), high enrichment factors (62.8–74.4), acceptable limits of quantitation (2.5 ng mL−1) and low limits of detection (0.39–0.72 ng mL−1). The intra-day precision at concentration levels of 5.0, 50.0 and 250.0 ng mL−1 ranged from 2.3–6.4% and the inter-day precision was between 1.0 and 5.5%. The sorbent can be re-used at least 15 times. It was applied to the extraction of BUs from genuine water samples where it showed satisfactory relative recoveries (75.1–111.4%) and precision (1.0–9.1%). Graphical abstractSchematic presentation of magnetic nanoparticles modified with hyperbranched polyamidoamine and their application for extraction of benzoylurea insecticides.

中文翻译：

---

用超支化聚酰胺胺修饰的磁性纳米粒子用于在通过 HPLC 定量之前提取苯甲酰脲类杀虫剂

摘要 通过在 Fe3O4 纳米粒子表面共价接枝超支化聚酰胺胺制备磁性吸附剂。该吸附剂用于从环境水样中提取苯甲酰脲类杀虫剂 (BU) 的磁固相萃取 (MSPE)。据认为，氢键相互作用和疏水相互作用是吸附 BUs 的主要机制。通过扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱、元素分析、Brunauer-Emmett-Teller 测量、X 射线光电子能谱、振动样品磁强计和 X 射线衍射对吸附剂进行了表征。对影响 MSPE 的各种实验参数进行了优化。用乙腈洗脱后，通过 HPLC 和二极管阵列检测对 BU 进行定量。该方法具有较宽的线性响应范围 (2.5-500.0 ng mL-1)、令人满意的测定系数 (0.9922-0.9976)、高富集因子 (62.8-74.4)、可接受的定量限 (2.5 ng mL-1) 和低检测限 (0.39–0.72 ng mL-1)。5.0、50.0 和 250.0 ng mL-1 浓度水平的日内精密度范围为 2.3-6.4%，日间精密度为 1.0-5.5%。吸附剂可重复使用至少 15 次。它用于从真正的水样中提取 BU，显示出令人满意的相对回收率 (75.1–111.4%) 和精密度 (1.0–9.1%)。图形摘要用超支化聚酰胺胺改性的磁性纳米粒子的示意图及其在提取苯甲酰脲类杀虫剂中的应用。令人满意的测定系数 (0.9922–0.9976)、高富集因子 (62.8–74.4)、可接受的定量限 (2.5 ng mL-1) 和低检测限 (0.39–0.72 ng mL-1)。5.0、50.0 和 250.0 ng mL-1 浓度水平的日内精密度范围为 2.3-6.4%，日间精密度为 1.0-5.5%。吸附剂可重复使用至少 15 次。它用于从真正的水样中提取 BU，显示出令人满意的相对回收率 (75.1–111.4%) 和精密度 (1.0–9.1%)。图形摘要用超支化聚酰胺胺改性的磁性纳米粒子的示意图及其在提取苯甲酰脲类杀虫剂中的应用。令人满意的测定系数 (0.9922–0.9976)、高富集因子 (62.8–74.4)、可接受的定量限 (2.5 ng mL-1) 和低检测限 (0.39–0.72 ng mL-1)。5.0、50.0 和 250.0 ng mL-1 浓度水平的日内精密度范围为 2.3-6.4%，日间精密度为 1.0-5.5%。吸附剂可重复使用至少 15 次。它用于从真正的水样中提取 BU，显示出令人满意的相对回收率 (75.1–111.4%) 和精密度 (1.0–9.1%)。图形摘要用超支化聚酰胺胺改性的磁性纳米粒子的示意图及其在提取苯甲酰脲类杀虫剂中的应用。5 ng mL-1) 和低检测限 (0.39–0.72 ng mL-1)。浓度水平为 5.0、50.0 和 250.0 ng mL-1 的日内精密度介于 2.3–6.4% 之间，日间精密度介于 1.0 和 5.5% 之间。吸附剂可重复使用至少 15 次。它用于从真正的水样中提取 BU，显示出令人满意的相对回收率 (75.1–111.4%) 和精密度 (1.0–9.1%)。图形摘要用超支化聚酰胺胺改性的磁性纳米粒子的示意图及其在提取苯甲酰脲类杀虫剂中的应用。5 ng mL-1) 和低检测限 (0.39–0.72 ng mL-1)。5.0、50.0 和 250.0 ng mL-1 浓度水平的日内精密度范围为 2.3-6.4%，日间精密度为 1.0-5.5%。吸附剂可重复使用至少 15 次。它用于从真正的水样中提取 BU，显示出令人满意的相对回收率 (75.1–111.4%) 和精密度 (1.0–9.1%)。图形摘要用超支化聚酰胺胺改性的磁性纳米粒子的示意图及其在提取苯甲酰脲类杀虫剂中的应用。它用于从真正的水样中提取 BU，显示出令人满意的相对回收率 (75.1–111.4%) 和精密度 (1.0–9.1%)。图形摘要用超支化聚酰胺胺改性的磁性纳米粒子的示意图及其在提取苯甲酰脲类杀虫剂中的应用。它用于从真正的水样中提取 BU，显示出令人满意的相对回收率 (75.1–111.4%) 和精密度 (1.0–9.1%)。图形摘要用超支化聚酰胺胺改性的磁性纳米粒子的示意图及其在提取苯甲酰脲类杀虫剂中的应用。