State Key Laboratory of Marine Environmental Science, Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, P. R. China.
J Sep Sci. 2019 Feb;42(4):878-887. doi: 10.1002/jssc.201800996. Epub 2019 Jan 4.
To enrich carbamate pesticides from complex matrices, an adsorbent based on poly (vinylboronic anhydride pyridine complex-co-ethylenedimethacrylate) monolith was fabricated and utilized as the extraction phase of multiple monolithic fiber solid-phase microextraction. Due to the abundant boron atoms in the monolith, the B-N coordination interaction between adsorbent and analytes play a key role in the efficient extraction of analytes. Under the optimized conditions, the monolithic fibers were combined with high-performance liquid chromatography for the quantify trace levels of carbamate pesticides in environmental water and orange juice samples. For water sample, the limit of detection and limit of quantification were in the range of 0.017-0.29 and 0.057-0.96 μg/L, respectively. The related values in orange juice samples were 0.038-0.39 and 0.12-1.36 μg/kg, respectively. Besides, the proposed method also exhibits wide linearity, satisfactory coefficients of determination, and good precision. The introduced approach was successfully applied to determine trace target analytes in real-life samples. The spiked recoveries with different fortified concentrations were in the range of 80.4-117% for water samples and 83.7-119% for fruit juice samples. The relative standard deviations were below 10%. The results evidence that the suggested method was convenient, reliable, and eco-friendly for the monitoring of trace levels of carbamate pesticides in complex samples such as waters and juices.
为了从复杂基质中富集氨基甲酸酯农药，制备了一种基于聚（乙烯基硼酸酐吡啶配合物-二乙烯基苯）整体柱的吸附剂，并将其用作多根整体纤维固相微萃取的萃取相。由于整体柱中含有丰富的硼原子，吸附剂与分析物之间的 B-N 配位相互作用在分析物的高效萃取中起着关键作用。在优化条件下，将整体纤维与高效液相色谱法结合，用于环境水样和橙汁样品中痕量氨基甲酸酯农药的定量分析。对于水样，检测限和定量限的范围分别为 0.017-0.29 和 0.057-0.96μg/L。橙汁样品中的相应值分别为 0.038-0.39 和 0.12-1.36μg/kg。此外，该方法还表现出较宽的线性范围、满意的决定系数和良好的精密度。所提出的方法成功地应用于实际样品中痕量目标分析物的测定。不同加标浓度的加标回收率范围为 80.4-117%，适用于水样，83.7-119%适用于果汁样品。相对标准偏差低于 10%。结果表明，该方法对于监测水样和果汁等复杂样品中痕量氨基甲酸酯农药是方便、可靠和环保的。
