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%).
Highlights
Sulfonylurea pesticides, an efficient class of herbicides, are commonly used for weed control in many crops [1]
Several analytical methods have been developed for chlorsulfuron analysis, mainly using gas chromatography [4], gas chromatography coupled to mass spectrometry [5], high performance liquid chromatography [6,7], high performance liquid chromatography coupled to mass spectrometry [8], fluorescent chemosensors [9], capillary electrophoresis [10], and immunosensors [11]
These results indicated that aggregation of the AuNPs was induced by acetamiprid
Summary
Sulfonylurea pesticides, an efficient class of herbicides, are commonly used for weed control in many crops [1]. Several analytical methods have been developed for chlorsulfuron analysis, mainly using gas chromatography [4], gas chromatography coupled to mass spectrometry [5], high performance liquid chromatography [6,7], high performance liquid chromatography coupled to mass spectrometry [8], fluorescent chemosensors [9], capillary electrophoresis [10], and immunosensors [11]. These analytical methods have high sensitivity and selectivity, they have some drawbacks, such as being time-consuming, requiring expensive instruments and experienced operators, and consuming large volumes of organic solvents [12,13]. A simple, rapid, inexpensive, and highly sensitive analytical method to determine trace amounts of chlorsulfuron in environmental water samples is required
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