Cao Xiaolin, Jiang Zejun, Wang Shanshan, Hong Sihui, Li Hui, Zhang Chao, Shao Yong, She Yongxin, Jin Fen, Jin Maojun, Wang Jing
Key Laboratory of Agri-food Safety and Quality, Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Ministry of Agriculture of China, Beijing, 100081, PR China.
Key Laboratory of Agri-food Safety and Quality, Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Ministry of Agriculture of China, Beijing, 100081, PR China.
J Chromatogr B Analyt Technol Biomed Life Sci. 2018 Mar 1;1077-1078:92-97. doi: 10.1016/j.jchromb.2017.11.034. Epub 2017 Dec 21.
UIO-66 crystals were explored for the first time to adsorb neonicotinoid insecticides in environmental water samples. HPLC coupled with tandem MS was used for quantification and determination of neonicotinoid insecticides. UiO-66 crystals was successfully synthesized by a simple constant-temperature bath method. Synthesized UiO-66 was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry and nitrogen adsorption porosimetry (NAP), which demonstrated a uniform particle size, a large Brunauer-Emmett-Teller (BET) surface area and high thermostability. The adsorbing results showed that UIO-66 crystals could be used as a promising adsorbents for rapid extraction of neonicotinoid insecticides and be reused at least 10 times. Under the optimized conditions, the limits of detection (LODs, S/N = 3) and limits of quantification (LOQs, S/N = 10) for the five insecticides were found to be 0.02-0.4 ng/mL and 0.05-1.0 ng/mL, respectively. This developed approach not only provided more simple and sensitive method, as well as possessing satisfactory recovery for neonicotinoid insecticides, but also for other traces in environmental samples.
首次探索了UIO-66晶体对环境水样中新烟碱类杀虫剂的吸附作用。采用高效液相色谱-串联质谱法对新烟碱类杀虫剂进行定量和测定。通过简单的恒温浴法成功合成了UiO-66晶体。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、热重分析和氮吸附孔隙率测定法（NAP）对合成的UiO-66进行了表征，结果表明其粒径均匀、具有较大的布鲁诺尔-埃米特-泰勒（BET）表面积和高热稳定性。吸附结果表明，UIO-66晶体可作为一种有前景的吸附剂用于快速萃取新烟碱类杀虫剂，且至少可重复使用10次。在优化条件下，五种杀虫剂的检测限（LOD，S/N = 3）和定量限（LOQ，S/N = 10）分别为0.02-0.4 ng/mL和0.05-1.0 ng/mL。这种开发的方法不仅提供了更简单、灵敏的方法，对新烟碱类杀虫剂具有令人满意的回收率，而且对环境样品中的其他痕量物质也适用。
