ArticleBiosensors2026
A Simple and Visual Colorimetric Aptasensor Based on AuNPs for the Rapid Detection of Sulfamethazine in Environmental Samples.
Article in Biosensors, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Sulfamethazine (SMZ) is widely used in livestock production, and its residues can enter water and soil environments, posing potential risks to human health and ecosystems. This study focuses on environmental samples and constructs an AuNP-based colorimetric aptasensor using the SMZ1S aptamer for the rapid visual detection of SMZ. Under optimized conditions, the aptasensor showed a wide linear range from 0.05 to 0.4 µg/mL and a limit of detection of 0.039 µg/mL. Molecular dynamics simulations have demonstrated that the aptamer's binding to SMZ is stable, providing a theoretical basis for the high selectivity of the aptasensor. Spike-and-recovery experiments yielded recoveries of 87.3-105.5%, 88.6-102.8%, and 87.5-103.4% for SMZ in lake water, tap water, and soil samples, respectively, with relative standard deviations of 5.9-8.3%, 8.0-10.6%, and 4.8-9.6%, showing good agreement with high-performance liquid chromatography (HPLC) results (R
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