吸附剂
固相萃取
色谱法
萃取(化学)
吸附
化学
基质(化学分析)
牙髓(牙)
样品制备
材料科学
有机化学
医学
病理
作者
Jiexue Zhao,Yuanxing Wang,Qingqing Zhang,Weiming Xiao,Aiping Yan,J. F. Hu,Songlin Jiang,Haijun Li,Yuanxing Wang
标识
DOI:10.1016/j.foodchem.2023.137991
摘要
This work presents a novel, convenient and effective method for assaying organophosphorus pesticides (OPPs) in the pulp and peel of citrus fruits. In this method, shaped UiO-66/alginate (UiO-66/Alg) beads were employed to replace the powder sorbents used in traditional dispersive solid phase extraction (d-SPE) methods. The UiO-66/Alg beads can be easily separated by only using a tweezer within 1 min, which effectively simplifies the sample pretreatment and overcomes the shortages brought by the incomplete separation of powder sorbents. Moreover, the matrix compounds can be effectively excluded by UiO-66/Alg beads, and the UiO-66/Alg beads can be reused at least 8 times. The d-SPE conditions were optimized by a single factor test. The method shows satisfactory sensitivity, accuracy and precision. Furthermore, ATR-FTIR and UV-Vis-DRS were employed to investigate the adsorption mechanism. Finally, the developed method was applied to monitor the OPPs in ten different citrus fruits.
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