Session: Advances in Separations:

With the growth of the population, the demand for food has sharply increased. Pesticides are used to delay the crisis of food shortages. However, the unreasonable usages of pesticides lead a large amount of residues into the environmental circulation. Considering the hazard of residues to human health and environment safety, instrumental analysis is applied to detect pesticide residues. Nevertheless, lower concentration of pesticide residues and complex matrix effects limit the direct use of instruments. Thus, a sample pre-treatment technology, which is called extraction, is applied prior the instrumental analysis. Based on above principles, we designed a magnetic covalent organic framework (MCOF) as sorbents to enrich and purify four pyrethroid residues from environmental water samples. The pre-treatment technology is magnetic solid phase extraction (MSPE), and the analytical instrument is high performance liquid chromatography (HPLC). The established method can selective detect four pyrethroid residues, and the mechanism of adsorption between the residues and sorbents are discussed.

Jiaxuan Fan

Appearances