Ding Hui, Wang Rongyu, Liu Wei, Cheng Supan, Ji Wenhua, Zheng Zhenjia, Wang Xiao
Shandong Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, China.
School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China.
Mikrochim Acta. 2019 Jan 12;186(2):103. doi: 10.1007/s00604-018-3210-y.
The authors describe a new spherical metal-organic coordination polymer (MOCP) for use as an adsorbent in solid-phase microextraction (SPME). By applying the ions Co(II), Fe(II), Cu(II), and Zn(II) in these polymers, MOCP with different morphology were obtained. The respective coatings for SPME display different extraction efficiency towards neonicotinoid insecticides (neo-nics). The Co(II)@MOCP coating displays an improved extraction capability for neo-nics when compared to the four commercially available coatings studied. Following extraction with the Co(II)@MOCP-coated fiber, the neo-nics were eluted using 1 mL of trifluoroacetic acid/acetonitrile solution and quantified by high performance liquid chromatography. The method, when applied to spiked honey samples, has good linearity (0.5-600 μg kg) and a low limit of detection (0.05-0.15 μg kg). The precision (n = 6) for a single fiber was in the range of 3.6-8.3%. The reproducibility (for n = 5) from fiber-to-fiber ranges between 5.4 and 8.8%. The Co(II)@MOCP-coated fiber can be reused more than 80 times without any apparent reduction in its performance. In addition, the relative recoveries from spiked honey samples are very good (91.5%-103.5%). Graphical abstract A spherical metal-organic coordination polymer (MOCP) was synthesized under the regulation of Co(II) and used for the solid-phase microextraction (SPME) of neonicotinoid insecticides found in honey.
作者描述了一种新型球形金属有机配位聚合物（MOCP），用作固相微萃取（SPME）中的吸附剂。通过在这些聚合物中应用Co（II）、Fe（II）、Cu（II）和Zn（II）离子，获得了具有不同形态的MOCP。用于SPME的相应涂层对新烟碱类杀虫剂（新烟碱）表现出不同的萃取效率。与所研究的四种市售涂层相比，Co（II）@MOCP涂层对新烟碱表现出更高的萃取能力。用Co（II）@MOCP涂层纤维萃取后，使用1 mL三氟乙酸/乙腈溶液洗脱新烟碱，并通过高效液相色谱法定量。该方法应用于加标蜂蜜样品时，具有良好的线性（0.5 - 600 μg/kg）和低检测限（0.05 - 0.15 μg/kg）。单根纤维的精密度（n = 6）在3.6% - 8.3%范围内。纤维间的重现性（n = 5）在5.4%至8.8%之间。Co（II）@MOCP涂层纤维可重复使用80多次，性能无明显下降。此外，加标蜂蜜样品的相对回收率非常好（91.5% - 103.5%）。图形摘要 在Co（II）的调控下合成了一种球形金属有机配位聚合物（MOCP），用于蜂蜜中发现的新烟碱类杀虫剂的固相微萃取（SPME）。
