AbstractBoron-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−1. 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−1 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 abstractSchematic of the monolith-based adsorbent (MBA) on a multiple monolith based fiber (MMF) for use in solid-phase microextraction of sulfonylurea herbicides (SUs).

中文翻译：

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硼酸盐增强复合单片纤维固相微萃取磺酰脲类除草剂

摘要硼-氮配位是一种用于提取含氨基氮化合物的有用相互作用。这里描述了一种新的整体吸附剂，它由聚（丙烯酰胺苯基硼酸/乙烯基-3-辛基咪唑鎓四氟硼酸盐-co-二乙烯基苯/二甲基丙烯酸乙烯酯）聚合物组成。为获得一种用于磺酰脲类除草剂的多重整体式纤维固相微萃取的新型萃取相而合成。结果表明，硼-氮配位相互作用在有效提取中起关键作用。还发现将吸附剂浸泡在硼酸盐溶液中进一步提高了富集性能。优化了制备条件和提取参数。用吸附剂萃取后，磺酰脲类除草剂通过带 DAD 检测的 HPLC 进行定量。检测限在 9.0–18 ng·L-1 范围内。该方法用于监测自来水、河流和废水样品中的除草剂。在 1.0、10 和 100 μg·L-1 的加标水平下的回收率在 70.1–108% 的范围内，并且在所有情况下，所有分析物的相对标准偏差值都小于 10%。用于磺酰脲类除草剂 (SU) 固相微萃取的多块整体纤维 (MMF) 上的整体式吸附剂 (MBA) 示意图。在所有情况下，10 和 100 μg·L-1 的范围为 70.1-108%，所有分析物的相对标准偏差值均小于 10%。用于磺酰脲类除草剂 (SU) 固相微萃取的多块整体纤维 (MMF) 上的整体式吸附剂 (MBA) 示意图。在所有情况下，10 和 100 μg·L-1 的范围为 70.1-108%，所有分析物的相对标准偏差值均小于 10%。用于磺酰脲类除草剂 (SU) 固相微萃取的多块整体纤维 (MMF) 上的整体式吸附剂 (MBA) 示意图。