查找使用阿拉丁产品的科研文献

Sea urchin-like CuxCoyS4@Cu2S nanoflowers with high selectivity and sensitivity for determine chloramphenicol in the environment

Shuang Sheng,Yao Yang,Yaoyao Xu,Shasha Zhao,Dongyan Fu,Hua Li,Jina Guo,Guowei Deng,Min Yang,Congdi Chen

Background: Antibiotics extensively utilized in the livestock and poultry industries due to their cost-effectiveness and significant therapeutic efficacy. In recent years, the issue of indiscriminate and excessive use of antibiotics has grown increasingly severe, posing a substantial threat to food safety and human health. Consequently, there is an urgent need to develop rapid and sensitive detection methods for antibiotics. Traditional detection methods often suffer from limitations such as expensive equipment, lengthy analysis times, and complex sample pretreatment procedures. In contrast, electrochemical sensor-based analytical methods offer advantages including simple instrumentation, rapid analysis, and high sensitivity. Results: Through the electrochemical properties of the glass carbon electrode(GCE) in its original state and under CuCo 2 S 4 @Cu 2 S/GCE, CuCoS 4 @Cu 2 S/GCE and Cu 2 CoS 4 @Cu 2 S/GCE modifications, the electrochemical active areas of modified CuCo 2 S 4 @Cu 2 S/GCE, CuCoS 4 @Cu 2 S/GCE and Cu 2 CoS 4 @Cu 2 S/GCE are 0.0643 cm 2 , 0.0740 cm 2 and 0.1056 cm 2 , respectively. Using the optimized scaled electrode Cu 2 CoS 4 @Cu 2 S/GCE, the response error was less than 5 % for five repeated samples. These results demonstrate the excellent conductivity and reproducibility of the composite, while maintaining satisfactory sensitivity and strong specificity. The Cu 2 CoS 4 @Cu 2 S/GCE based sensor has a dynamic linear range of 10–20 μmol/L with the extremely low detection limit of 0.534 μmol/L and a sensitivity of 6.37 μA μm −1  cm −2 . The sensor successfully quantified CAP in water samples with a recovery rate of 99.3 % to 102.5 % and an RSD of less than 3.2 %. Significance: This study reports the synthesis of nanocomposites exhibiting exceptional electrical sensing performance, their modification onto electrode surfaces, and their application in the rapid detection of antibiotics in food samples. The selectivity, accuracy, and practical applicability of the developed analytical method rigorously evaluated. Additionally, a systematic investigation into the electrochemical reaction mechanism of antibiotics conducted, which holds significant implications for environmental antibiotic detection.