Yin Ran, Gao Lei, Qin Dongli, Chen Ligang, Niu Na
Key Laboratory of Forest Plant Ecology, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China.
Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, China.
Mikrochim Acta. 2021 Dec 10;189(1):23. doi: 10.1007/s00604-021-05100-9.
A synthesis route of using cellulose as the precursor to prepare porous carbon (PC) had been established in this study. The as-prepared PC was introduced as carriers in the synthesis process of porous carbon-molecularly imprinted polymers (PC-MIPs), which greatly improved the absorption capacity of MIPs. Triazine pesticides in corn were extracted with matrix solid-phase dispersion (MSPD) using the PC-MIPs as dispersants and determined by ultraperformance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Under the optimal MSPD condition for extracting six kinds of triazines (simazine, terbutryn, simetryne, prometryne, ametryn, and atrazine), the detection limits were 0.005-0.02 ng g, while the precisions were 1.2-5.9%, and the recoveries were 92.6-104.7%. The method has been extensively applied to analyze various corn samples. Atrazine residue (1.2 μg kg) was detected in one corn sample, which was lower than the maximum residual limit indicated by the Chinese stated standards (50 μg kg).
本研究建立了一种以纤维素为前驱体制备多孔碳（PC）的合成路线。所制备的PC被引入到多孔碳-分子印迹聚合物（PC-MIPs）的合成过程中作为载体，这极大地提高了MIPs的吸附能力。以PC-MIPs为分散剂，采用基质固相分散（MSPD）法萃取玉米中的三嗪类农药，并通过超高效液相色谱-串联质谱（UPLC-MS/MS）进行测定。在萃取六种三嗪类（西玛津、特丁净、西草净、扑草净、莠灭净和莠去津）的最佳MSPD条件下，检测限为0.005-0.02 ng/g，精密度为1.2-5.9%，回收率为92.6-104.7%。该方法已广泛应用于分析各种玉米样品。在一个玉米样品中检测到莠去津残留量为1.2 μg/kg，低于中国规定标准（50 μg/kg）所示的最大残留限量。
