背景:需要开发低成本,可靠的便携式设备,以提高复杂样品微提取技术的效率。金属有机骨架(MOF)已被证明是有前途的吸附剂,因为它们具有良好的记录性能。然而,它们的绿色制备和与纸基基材的结合尚未得到令人满意的探索,以制造可持续的吸附阶段。
结果:在这项工作中,通过一锅法进行纸基材(作为可持续载体)与MOF(作为吸附阶段)的杂交。具体而言,选定的MOF,MIL-53(Al),在不需要高温或高压的情况下,在水溶液中原位生长到纸张表面上,从而符合绿色分析化学原理。对优化的复合材料(MIL-53(Al)@纤维素纸)进行了表征,并作为五种新烟碱(NEO)(噻虫嗪,clothianidin,吡虫啉,啶虫脒,和噻虫啉)。此外,从环境水样中分离出这些污染物,证明了其可行性,随后通过与二极管阵列检测偶联的HPLC对其进行测定。整个方法具有令人满意的分析性能,回收率在86%至114%之间,合适的精度(RSD低于14%),检测限范围为1.0至1.6μgL-1。此外,该方法的绿色度是通过应用不同的现有指标来评估的。开发的提取装置负担得起(<0.08€/装置),机械和化学稳定,有可能重复使用超过11个周期,从而证明其适合于快速筛选环境样品中的农药。
结论:本报告提出,第一次,MIL-53(Al)纤维素纸复合材料的绿色合成及其作为吸附相从环境水样中提取近地天体的应用。我们认为,为制造这些可持续的纸基吸附相提出的策略为与其他MOF或材料进一步杂交铺平了道路。此外,它为它们在水生环境中的污染物或其他危险化合物的提取中的应用开辟了巨大的可能性。
BACKGROUND: There is a need to develop low-cost, reliable and portable devices to enhance the efficiency of microextraction techniques in complex samples. Metal-organic frameworks (MOFs) have proven to be promising sorbents due to their well-documented properties. However, their green preparation and combination with paper-based substrates have not been satisfactorily explored to fabricate sustainable sorptive phases.
RESULTS: In this work, the hybridization of a paper substrate (as a sustainable support) with MOFs (as a sorptive phase) was carried out by one-pot approach. Concretely, the selected MOF, MIL-53(Al), was in-situ growth onto the paper surface in aqueous solution without the need for high temperature or pressure, thereby aligning with the Green Analytical Chemistry principles. The optimized composite (MIL-53(Al)@cellulose paper) was characterized and evaluated as extraction sorbent for five neonicotinoids (NEOs) (thiamethoxam, clothianidin, imidacloprid, acetamiprid, and thiacloprid). Furthermore, its feasibility was demonstrated by isolating these pollutants from environmental water samples, followed their determination by HPLC coupled to diode array detection. The whole method showed satisfactory analytical performance with recoveries between 86 and 114 %, suitable precision (with RSD lower than 14 %), and limits of detection ranged from 1.0 to 1.6 μg L-1. Besides, the greenness of the method was assessed by application of different existing metrics. The developed extraction device was affordable (<0.08 €/device) and mechanical and chemically stable, being possible its reuse more than 11 cycles, thus demonstrating its suitability for rapid screening of pesticides in environmental samples.
CONCLUSIONS: This report presents, for the first time, the green synthesis of MIL-53(Al)cellulose paper composite and its application as a sorptive phase for the extraction of NEOs from environmental water samples. We believe that the proposed strategy for fabricating these sustainable paper-based sorptive phases paves the way for further hybridizations with other MOFs or materials. Additionally, it opens up large possibilities for their application in extraction of pollutants or other hazardous compounds in aquatic environments.