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| Rapid Detection of Volatile Pesticides by Surface Enhanced Raman Spectroscopy with Headspace Solid Phase Extraction |
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| DOI： |
| KeyWord:surface-enhanced Raman spectrum gold nanofilm headspace solid phase extraction fonofos ferbam |
| Author | Institution |
| WANG Cui-ping， WANG Shan， ZHANG Huan， WANG Chun-rong |
College of Food Science and Engineering，Jiangxi Agricultural University，Nanchang ，China |
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| Abstract: |
| In this paper，a fast and efficient method for the detection of volatile pesticides was devel? oped，based on the gold nanofilm as surface enhanced Raman spectroscopy（SERS）substrate，which was prepared by redox reaction on the surface of stainless steel sheet. The volatile pesticides，i. e. fonofos and ferbam were detected by SERS with headspace solid phase extraction（SPE）. Significant Raman signals were obtained by headspace solid phase extraction at 75 ℃ and 55 ℃ for fonofos and ferbam within 15 min，respectively. The limits of detection（LODs）were both 5 × 10－3 mg/L for these two pesticides. There were linear relationships between Raman spectrum intensities of the characteris? tic peaks（999 cm－1 and 1 381 cm－1 ）and the pesticdes in a certain mass concentration ranges，with their correlation coefficients（R2 ）of 0. 984 8 and 0. 977 8，respectively. The recoveries for fonofos and ferbam in fruit juice were in the range of 93. 3%－112% and 92. 5%－104%，with relative stan? dard deviations（RSDs）of 4. 1%－5. 2% and 3. 4%－6. 5%，respectively. The method is rapid and sensitive，which has a potential application value in the detection of volatile pesticides |
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