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COF-SiO₂@Fe₃O₄ 复合物用于在蔬菜中磁性固相提取铁类农药的复合物

Ling Yu^1,2, Aiqing Xia¹, Yongchao Hao¹

¹College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China.

Molecules (Basel, Switzerland)

|May 25, 2024

概括

一种新的磁性纳米材料,COF-SiO2@Fe3O4,可以有效地去除蔬菜中的类杀虫剂 (PYR) 残留物. 这种方法为检测PYR提供了灵敏和快速的方法,确保了消费者的安全.

科学领域:

分析化学分析化学
材料科学材料科学材料科学
环境科学环境科学

背景情况:

类杀虫剂 (PYR) 在农业中广泛使用,但残留物可能超过安全限值,对消费者构成风险.
迫切需要有效的技术来消除或检测蔬菜中的PYRs的痕迹.

研究的目的:

开发一种简单有效的磁性固相提取 (MSPE) 策略,用于同时净化和丰富蔬菜中的五种PYR.
使用新型磁性共价有机框架纳米材料COF-SiO2@Fe3O4作为PYR检测的吸附剂.

主要方法:

通过使用Fe3O4磁芯和特定有机结构单元的溶热方法制备COF-SiO2@Fe3O4.
优化MSPE条件,包括吸附剂量,提取时间和化溶剂.
使用气体染色学-质谱学 (GC-MS) 进行定量分析的方法验证.

主要成果:

由于COF-SiO2@Fe3O4吸附剂的π电子系统和基团,它可以有效捕获PYR.
优化的MSPE方法在指定的范围内显示出强烈的线性 (R2 = 0.99900.9997).
已达到低检测值 (0.31.5 μg·kg−1) 和量化值 (0.94.5 μg·kg−1),恢复率高 (80.2116.7%) 和低RSD (<7.0%).

结论:

与其他测试材料相比,COF-SiO2@Fe3O4是一种高效,快速和选择性的PYR吸附剂.
开发的MSPE方法对在真实蔬菜样本中准确确定PYR有希望,提高了食品安全.

关键词:

协价有机框架协价有机框架气体染色学质谱学质谱学磁性固体相提取磁性固体相提取类杀虫剂类杀虫剂

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