State Key Laboratory of Marine Environmental Science, Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem, College of the Environment and Ecology, Xiamen University, P. O. Box 1009, Xiamen, 361005, China.
Mikrochim Acta. 2018 Mar 16;185(4):226. doi: 10.1007/s00604-018-2763-0.
Boron-nitrogen coordination is a useful interaction for use in the extraction of amino-nitrogen-containing compounds. A new monolithic adsorbent is described here that consisted of poly(acrylamidophenyl boronic acid/vinyl-3-octylimidazolium tetrafluroborate-co-divinylbenzene/ethylene dimethacrylate) polymer. It was synthesized with the aim to obtain a new kind of extraction phase for multiple monolith based fiber solid-phase microextraction of sulfonylurea herbicides. Results indicate that boron-nitrogen coordination interaction plays a key role in the efficient extraction. It is also found that soaking the sorbent in a borate solution further improves the enrichment performance. The preparation conditions and extraction parameters were optimized. Following extraction with the adsorbent, the sulfonylurea herbicides were submitted to quantitation by HPLC with DAD detection. The limits of detection are in the range of 9.0-18 ng·L. The method was applied to monitor the herbicides in samples of tap, river and waste waters. Recoveries at spiking levels of 1.0, 10 and 100 μg·L are in the range of 70.1-108%, and the values for relative standard deviation are less than 10% for all analytes in all cases. Graphical abstract Schematic of the monolith-based adsorbent (MBA) on a multiple monolith based fiber (MMF) for use in solid-phase microextraction of sulfonylurea herbicides (SUs).
硼氮配位是用于提取含氨基氮化合物的有用相互作用。本文描述了一种新型整体式吸附剂，由聚（丙烯酰胺基苯硼酸/乙烯基-3-辛基咪唑四氟硼酸盐-共-二乙烯基苯/乙二醇二甲基丙烯酸酯）聚合物组成。它的合成目的是获得一种新的萃取相，用于基于多根整体柱的纤维固相微萃取磺酰脲类除草剂。结果表明，硼氮配位相互作用在高效萃取中起着关键作用。还发现，将吸附剂浸泡在硼酸盐溶液中可以进一步提高富集性能。优化了制备条件和萃取参数。用吸附剂萃取后，用 HPLC 结合 DAD 检测对磺酰脲类除草剂进行定量。检测限范围为 9.0-18 ng·L。该方法用于监测自来水中、河流中和废水中的除草剂。在 1.0、10 和 100 μg·L 的加标水平下的回收率在 70.1-108%范围内，所有分析物的相对标准偏差值均小于 10%。
