Carbofuran is a pesticide currently prohibited in many countries. It can cause serious damages in the nervous system and has been associated with cancer. However, CBF residues are still found in food samples around the world. Here, we develop an electrochemical non-enzymatic sensor for rapid and low-cost detection of CBF. Commercial indium tin oxide (ITO) electrodes were modified with a two-step Layer-by-Layer (LbL) approach: i) an LbL film of poly(diallyldimethyl ammonium) (PDDA) and graphene oxide (GO), which is further electrochemically reduced to produce (PDDA/ERGO)-modified ITO electrodes; and ii) an LbL film of magnetite nanoparticles (MNP) and poly(styrene sulfonate) (PSS) to form the ITO/(PDDA/ERGO)₅/(MNP/PSS)₅, with 5 representing the number of bilayers. The growth mechanism and morphology of the modified electrode were characterized by combining microscopy and optical spectroscopy. The ITO/(PDDA/ERGO)₅/(MNP/PSS)₅ was applied in the electrochemical detection of CBF by differential pulse voltammetry (DPV) in standard solutions, reaching a sensitivity of 0.2543 (μA cm^-2) (μmol L^-1) and LOD of 0.407 μmol L^-1, and then in real samples of tap water and soil.

呋喃丹是许多国家/地区目前禁止使用的农药。它会导致神经系统严重受损，并与癌症有关。但是，世界各地的食物样本中仍发现有CBF残留物。在这里，我们开发了一种电化学非酶传感器，用于快速低成本地检测CBF。商业氧化铟锡（ITO）电极采用两步逐层（LbL）的方法进行了修饰：i）聚二烯丙基二甲基铵（PDDA）和氧化石墨烯（GO）的LbL膜，通过电化学进一步减少生产（PDDA / ERGO）改性的ITO电极；ii）磁铁矿纳米颗粒（MNP）和聚（苯乙烯磺酸盐）（PSS）的LbL膜，形成ITO /（PDDA / ERGO）₅ /（MNP / PSS）₅，其中5代表双层数。结合显微镜和光谱学对改性电极的生长机理和形貌进行了表征。在ITO /（PDDA / ERGO）₅ /（MNP / PSS）₅在CBF的电化学检测标准溶液施加由微分脉冲伏安法（DPV），达到0.2543（μAcm的灵敏度^-2）（微摩尔大号^{- 1}）和LOD为0.407μmolL ^-1，然后在自来水和土壤的真实样品中。