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Sol-gel fabrication and performance evaluation of graphene-based hydrophobic solid-phase microextraction fibers for multi-residue analysis of pesticides in water samples.
Analytical Methods ( IF 2.7 ) Pub Date : 2020-07-07 , DOI: 10.1039/d0ay01153c Jiaxin Hu 1 , Cheng Qian , Yinchenxi Zhang , Yonghui Tian , Yixiang Duan
Analytical Methods ( IF 2.7 ) Pub Date : 2020-07-07 , DOI: 10.1039/d0ay01153c Jiaxin Hu 1 , Cheng Qian , Yinchenxi Zhang , Yonghui Tian , Yixiang Duan
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Widespread use of organophosphorus pesticides poses serious environmental threats, and hence calls for effective analysis methods for these classes of compounds. In this study, a lab-made graphene-based solid-phase microextraction (SPME) fiber was fabricated by the sol–gel method and combined with a gas chromatography-flame photometry detector (GC-FPD) to realize the detection of trace OPPs in water samples. Compared to the commercial fiber coatings, the new sol–gel graphene fiber coatings showed advantages of good durability and solvent resistance, which were attributed to the hydrophobic and antibacterial properties of the functionalized graphene and 3-(trimethoxysilyl)propyldimethyloctadecylammonium chloride (QAS). A headspace SPME method in combination with a GC-FPD was established to evaluate the performance of the novel fibers. The proposed method showed a good linear relationship for the eight OPPs (R2 ≥ 0.9957) in the concentration range of 1 to 1000 μg L−1, with limits of quantification of 0.11–3.37 μg L−1 and limits of detection of 0.03–1.01 μg L−1. Furthermore, the developed method also exhibited good recoveries for the analysis of OPPs both in rainwater and lake water, which demonstrates that this method is an alternative choice for multi-residue analysis of OPPs, and it has the potential for broader applications in the future.
中文翻译：
用于水样中农药残留的石墨烯基疏水性固相微萃取纤维的溶胶-凝胶制备和性能评估。
有机磷农药的广泛使用对环境构成了严重威胁，因此需要针对此类化合物的有效分析方法。在这项研究中，通过溶胶-凝胶法制造了实验室制造的基于石墨烯的固相微萃取（SPME）纤维，并与气相色谱-火焰光度检测器（GC-FPD）相结合，以实现对痕量OPP的检测。水样本。与商用纤维涂料相比，新型溶胶-凝胶石墨烯纤维涂料具有良好的耐久性和耐溶剂性，这归因于功能化石墨烯和3-（三甲氧基甲硅烷基）丙基二甲基十八烷基氯化铵（QAS）的疏水性和抗菌性。建立了结合GC-FPD的顶空SPME方法来评估新型纤维的性能。[R 2 ≥0.9957）中的1至1000μgL范围-1，具有0.11-3.37微克大号定量限-1和检测0.03-1.01微克升限度-1。此外，所开发的方法在雨水和湖水中的OPP分析中也显示出良好的回收率，这表明该方法是OPPs多残留分析的另一种选择，并且在将来有广阔的应用前景。
更新日期：2020-08-14
中文翻译：
用于水样中农药残留的石墨烯基疏水性固相微萃取纤维的溶胶-凝胶制备和性能评估。
有机磷农药的广泛使用对环境构成了严重威胁，因此需要针对此类化合物的有效分析方法。在这项研究中，通过溶胶-凝胶法制造了实验室制造的基于石墨烯的固相微萃取（SPME）纤维，并与气相色谱-火焰光度检测器（GC-FPD）相结合，以实现对痕量OPP的检测。水样本。与商用纤维涂料相比，新型溶胶-凝胶石墨烯纤维涂料具有良好的耐久性和耐溶剂性，这归因于功能化石墨烯和3-（三甲氧基甲硅烷基）丙基二甲基十八烷基氯化铵（QAS）的疏水性和抗菌性。建立了结合GC-FPD的顶空SPME方法来评估新型纤维的性能。[R 2 ≥0.9957）中的1至1000μgL范围-1，具有0.11-3.37微克大号定量限-1和检测0.03-1.01微克升限度-1。此外，所开发的方法在雨水和湖水中的OPP分析中也显示出良好的回收率，这表明该方法是OPPs多残留分析的另一种选择，并且在将来有广阔的应用前景。
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