Research on Qualitative Detection of Carbofuran Residues in Liquor by Surface Enhanced Laser Raman Technique

Abstract

Abstract: Abstract: In this paper,a method of surface-enhanced Raman spectroscopy(SERS) for the detection of the residue of carbofuran in liquor was established.Firstly. Au NPS and Au@Ag NPS with different thicknesses of Ag shell were prepared ,and then the SERS performance of them were evaluated by a dye molecule rhodamine 6G (R6G); In alkaline solution, the 2, 6-Dichloroquinone-4-chloroimide as a marker was introduced to carbofuran, and then mixed with the NPS that has the better SERS performance in the proportion.we discussed the conditions for SERS signal acquisition,compared and belonged the Raman peaks,and estimated the enhancement factor of carbofuran on NPS enhanced substrate. The results shows that : Au@Ag NPS with 7nm Ag shell thickness possessed the best SERS effect,and it can be used as the SERS substrate ,The lowest concentration of Au@Ag NPS which was obtained to carbofuran reached 1×10-17M and enhancement factor reached 2×1010.All three kinds of liquor were detected by this method and the amount of the carbofuran was found.The method is fast, simple and reliable.

Key words: SERS, Au@Ag NPS, Characterization, Carbofuran, qualitative detection

CLC Number:

TS207.3

CHEN Yuqin. Research on Qualitative Detection of Carbofuran Residues in Liquor by Surface Enhanced Laser Raman Technique[J]. FOOD SCIENCE, 0, (): 0-0.

References

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