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| Rapid Detection of Carbaryl in Coconut Juice by Diazotization-Coupling Reaction Combined with Surface-enhanced Raman Spectroscopy |
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| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:diazotization-coupling reaction surface-enhanced Raman spectroscopy rapid analysis coconut juice carbaryl |
| Author | Institution |
| CHEN Yang,ZHANG Kai-ge,HU Yu-ling*,LI Gong-ke* |
中山大学化学与化学工程学院 |
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| Abstract: |
| In this paper,the hydrolysis of carbaryl was combined with the diazotization coupling reaction to produce the azoic compounds,which have strong surface-enhanced Raman scattering（SERS） effect.Based on the principle,a novel method for the determination of carbaryl was established using shell isolated Au@SiO2 nanoparticles as SERS substrates which consist of Au nanoparticle cores with a diameter of about 55 nm and the silica shell with its thickness about 1-2 nm.The conditions of the reaction and the method of the detection were optimized.Under the optimal conditions,the linearity was observed in the range of 5.0-100.0 mg/L with a limit of detection of 1.7 mg/L at 1 218 cm-1.The method was applied in the analysis of carbaryl in coconut juice with recoveries of 100.4%-105.1% and relative standard deviations （RSDs） of 2.8%-4.9%.The results indicated that this proposed method was simple,rapid,low-cost and low-consuming.The proposed method was applicable for in situ detection of carbaryl in real samples. |
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