当前位置：
X-MOL 学术
›
Anal. Methods
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Trace analysis of organophosphorus pesticide residues in fruit juices and vegetables by an electrochemically fabricated solid-phase microextraction fiber coated with a layer-by-layer graphenized graphite/graphene oxide/polyaniline nanocomposite.
Analytical Methods ( IF 2.7 ) Pub Date : 2020-06-17 , DOI: 10.1039/d0ay00626b Sara Manafi Khoshmanesh 1 , Hamed Hamishehkar 2 , Habib Razmi 1
Analytical Methods ( IF 2.7 ) Pub Date : 2020-06-17 , DOI: 10.1039/d0ay00626b Sara Manafi Khoshmanesh 1 , Hamed Hamishehkar 2 , Habib Razmi 1
Affiliation
|
Herein, a solid-phase microextraction pencil lead fiber coated with a layer-by-layer graphenized graphite/graphene oxide/polyaniline nanocomposite (GG/GO/PANI) was fabricated by an in situ electrochemical technique for the trace analysis of organophosphorus pesticide residues in packed grape and apple juice and also fresh tomato samples. The effects of various parameters, including the type of desorption solvent, adsorption time, desorption time, pH, salt addition, and stirring rate, on the extraction efficiency of the studied pesticides were investigated and accordingly, these parameters were optimized. The proposed fiber demonstrated desirable linear ranges (0.01–300 μg L−1) with good correlation coefficients (R2 ≥ 0.996) as well as low limits of detection (0.003–0.03 μg L−1) for the studied pesticides. The relative standard deviations (n = 5) for the extraction of 50 μg L−1 of each analyte were less than 7 and 11.5% for inter and intra-day precisions, respectively. This fast, facile, and repeatable electrochemical fabrication method produced a porous and homogeneous coating. The proposed fiber demonstrated good extraction efficiency, high stability, and long life-time despite being low cost. The successful application of the proposed fiber for the trace determination of pesticides in complex food matrices was proven by the satisfactory relative recoveries of 80.7–116.5%.
中文翻译：
通过电化学制备的固相微萃取纤维包覆一层石墨化石墨/氧化石墨烯/聚苯胺纳米复合材料，对果汁和蔬菜中的有机磷农药残留进行痕量分析。
在此，通过原位电化学技术制备了涂覆有一层石墨化石墨/氧化石墨烯/聚苯胺纳米复合材料（GG / GO / PANI）的固相微萃取铅笔芯纤维，用于痕量有机磷农药残留的分析。包装葡萄和苹果汁，以及新鲜的番茄样品。研究了解吸溶剂的种类，吸附时间，解吸时间，pH，加盐量和搅拌速率等各种参数对所研究农药的提取效率的影响，并对其进行了优化。提出的光纤表现出理想的线性范围（0.01–300μgL -1），具有良好的相关系数（R 2≥0.996）以及所研究农药的低检出限（0.003-0.03μgL -1）。对于日间和日内精度，提取50μgL -1的每种分析物的相对标准偏差（n = 5）分别小于7和11.5％。这种快速，简便且可重复的电化学制造方法产生了多孔且均匀的涂层。所提出的纤维尽管成本低，但仍具有良好的提取效率，高稳定性和长寿命。令人满意的相对回收率80.7–116.5％证明了该纤维成功用于复杂食品基质中农药的痕量测定。
更新日期：2020-07-02
中文翻译：
通过电化学制备的固相微萃取纤维包覆一层石墨化石墨/氧化石墨烯/聚苯胺纳米复合材料，对果汁和蔬菜中的有机磷农药残留进行痕量分析。
在此，通过原位电化学技术制备了涂覆有一层石墨化石墨/氧化石墨烯/聚苯胺纳米复合材料（GG / GO / PANI）的固相微萃取铅笔芯纤维，用于痕量有机磷农药残留的分析。包装葡萄和苹果汁，以及新鲜的番茄样品。研究了解吸溶剂的种类，吸附时间，解吸时间，pH，加盐量和搅拌速率等各种参数对所研究农药的提取效率的影响，并对其进行了优化。提出的光纤表现出理想的线性范围（0.01–300μgL -1），具有良好的相关系数（R 2≥0.996）以及所研究农药的低检出限（0.003-0.03μgL -1）。对于日间和日内精度，提取50μgL -1的每种分析物的相对标准偏差（n = 5）分别小于7和11.5％。这种快速，简便且可重复的电化学制造方法产生了多孔且均匀的涂层。所提出的纤维尽管成本低，但仍具有良好的提取效率，高稳定性和长寿命。令人满意的相对回收率80.7–116.5％证明了该纤维成功用于复杂食品基质中农药的痕量测定。
京公网安备 11010802027423号