用分子印迹聚合物涂覆的银芯作为吸附剂,在移液管吸头固相萃取中测定椰子水中的新烟碱类物质

IF 4.6 Q1 CHEMISTRY, ANALYTICAL
Laíse Aparecida Fonseca Dinali, Anny Talita Maria da Silva, Keyller Bastos Borges
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引用次数: 0

摘要

在这项工作中,我们报告了一种名为 Ag-MPS@MIP 的创新吸附剂,它具有核@壳结构,即以 3-甲基丙烯酰氧基丙基三甲氧基硅烷修饰的银纳米粒子为核,以甲基丙烯酸为基础的分子印迹聚合物为壳。在进行高效液相色谱分析之前,使用移液管吸头固相中的 Ag-MPS@MIP 从椰子水样品中提取了噻虫嗪、吡虫啉和啶虫脒。分离采用等度模式,流动相为 C18 色谱柱(Phenomenex,150 mm × 4.6 mm,5 μm)、0.3%磷酸酸化的超纯水和乙腈(78:22, v/v),流速为 1.0 mL min-1,进样量为 10 μL,温度为 25 °C,波长为 260 nm。通过不同的仪器技术对吸附剂和前体材料进行了适当的表征。对影响吸头固相法从椰子水样品中回收分析物的主要因素进行了优化,如样品体积(250 μL)、样品 pH 值(pH = 5.0)、离子强度(1%,m/v)、洗涤溶剂(300 μL超纯水)、洗脱液体积和类型(500 μL甲醇)、吸附剂用量(15 mg)、渗滤-分配循环(1×)和重复使用(5×)。结果表明,新烟碱类化合物的萃取回收率为82.80%~96.36%,富集因子为5,线性范围为15~4000 ng mL-1,相关系数(r)为0.99,检出限为5 ng mL-1,选择性和稳定性良好,精密度(RSD%: 0.52~9.64%)和准确度(RE%: -5.19~6.45%)良好。该方法成功地应用于椰子汁的实际样品中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Silver Core Coated with Molecularly Imprinted Polymer as Adsorbent in Pipet-Tip Solid Phase Extraction for Neonicotinoids Determination from Coconut Water

Silver Core Coated with Molecularly Imprinted Polymer as Adsorbent in Pipet-Tip Solid Phase Extraction for Neonicotinoids Determination from Coconut Water
In this work, we report an innovative adsorbent named Ag-MPS@MIP that has a core@shell structure, i.e., silver nanoparticles modified with 3-methacryloxypropyltrimethoxysilane as the core and molecularly imprinted polymer based on methacrylic acid as its shell. Thiamethoxam, imidacloprid, and acetamiprid were extracted from coconut water samples using Ag-MPS@MIP in pipet-tip solid phase, prior to high-performance liquid chromatography analysis. The separation was carried out on isocratic mode using a mobile phase consisting of C18 column (Phenomenex, 150 mm × 4.6 mm, 5 μm), ultrapure water acidified with 0.3% phosphoric acid:acetonitrile (78:22, v/v), flow rate at 1.0 mL min–1, injection volume of 10 μL, temperature of 25 °C, and wavelength at 260 nm. The adsorbent and precursor materials were properly characterized by different instrumental techniques. The main factors affecting the recovery of analytes from coconut water samples by pipet-tip solid phase were optimized, such as sample volume (250 μL), sample pH (pH = 5.0), ionic strength (1%, m/v), washing solvent (300 μL ultrapure water), volume and type of eluent (500 μL methanol), amount of adsorbent (15 mg), cycle of percolation–dispensing (1×), and reuse (5×). Thereby, the neonicotinoids presented extraction recoveries between 82.80 and 96.36%, enrichment factor of 5, linearity ranged from 15 to 4000 ng mL–1, correlation coefficient (r) > 0.99, limit of detection of 5 ng mL–1, satisfactory selectivity, stability, and proper precision (RSD%: 0.52–9.64%) and accuracy (RE%: −5.19–6.45%). The method was successfully applied to real samples of coconut water.
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来源期刊
ACS Measurement Science Au
ACS Measurement Science Au 化学计量学-
CiteScore
5.20
自引率
0.00%
发文量
0
期刊介绍: ACS Measurement Science Au is an open access journal that publishes experimental computational or theoretical research in all areas of chemical measurement science. Short letters comprehensive articles reviews and perspectives are welcome on topics that report on any phase of analytical operations including sampling measurement and data analysis. This includes:Chemical Reactions and SelectivityChemometrics and Data ProcessingElectrochemistryElemental and Molecular CharacterizationImagingInstrumentationMass SpectrometryMicroscale and Nanoscale systemsOmics (Genomics Proteomics Metabonomics Metabolomics and Bioinformatics)Sensors and Sensing (Biosensors Chemical Sensors Gas Sensors Intracellular Sensors Single-Molecule Sensors Cell Chips Arrays Microfluidic Devices)SeparationsSpectroscopySurface analysisPapers dealing with established methods need to offer a significantly improved original application of the method.
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