Anti-Agglomeration Behavior and Sensing Assay of Chlorsulfuron Based on Acetamiprid-Gold Nanoparticles

Abstract

Monitoring of low levels of chlorsulfuron in environmental water samples is important. Although several detection methods have been developed, they all have some drawbacks, such as being time-consuming, requiring expensive instruments and experienced operators, and consuming large volumes of organic solvents. There is an urgent need for a simple, rapid, and inexpensive detection method for chlorsulfuron. Herein, such a method was developed using anti-aggregation of gold nanoparticles (AuNPs) in the presence of acetamiprid in agricultural irrigation water samples. Aggregation of the AuNPs was induced by acetamiprid, and this produced a distinct color change from Bordeaux red to blue. However, the strong hydrogen bonding interaction between chlorsulfuron and acetamiprid could inhibit AuNP aggregation. The effect of chlorsulfuron on the anti-agglomeration behavior of AuNPs was monitored by ultraviolet–visiblespectroscopy (UV-Vis) and the naked eye over a concentration range 0.1–100 mg/L. The detection limit for chlorsulfuron was 0.025 mg/L (signal-to-noise ratio of three). This colorimetric method was successfully applied to the determination of chlorsulfuron in spiked tap water and agricultural irrigation water with satisfactory recoveries (76.3%–94.2%).

Gold Nanoparticle-Based Colorimetric Strategies for Chemical and Biological Sensing Applications

“…The aggregation of AuNPs results in a large red-shift of the LSPR peak, accompanied by a characteristic color change from red to blue [24]. Therefore, aggregation-based colorimetric assays have wide-ranging sensing applications in proteins [25], small molecules [26], inorganic ions [27,28], enzyme activities [29], and oligonucleotides [30]. Currently, these colorimetric assays can be divided into two systems: labeled and label-free.…”

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

“…Some previous literatures have reported that heavy metal ion, melamine, or pesticides residues can be detected in food by using the principle of the blocking of gold nanoparticle aggregation. For example, the strong hydrogen bonding interaction between acetamiprid and chlorsulfuron will inhibit the AuNP aggregation induced by acetamiprid [119]. According to the above-mechanism, our group has proposed this anti-aggregation gold nanoparticle colorimetry to monitor low levels of chlorsulfuron in environmental water samples.…”

Detection of Lysyl Oxidase Activity in Tumor Extracellular Matrix Using Peptide-Functionalized Gold Nanoprobes

“…Owing to their unique optical properties, controllable size, and catalytic properties, AuNP-based sensors have been used in numerous innovative approaches [ 32 ]. Furthermore, the versatile surface chemistry of AuNPs facilitates the conjugation of various molecular probes for the detection of biological and chemical targets such as metal ions [ 33 ], small molecules [ 34 ], proteins [ 35 ], and nucleic acids [ 36 ]. Importantly, compared to other sensing tools, a AuNP-based colorimetric sensor is a simple method for the sensitive detection of the target because the color change can be directly monitored without sophisticated instruments.…”