| 顶空固相萃取/表面增强拉曼法对挥发性农药的快速检测研究 |
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| 基金项目:国家自然科学基金（31960500）；江西省教育厅科技项目（170282） |
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| 中文摘要:该文开发了一种基于金纳米膜的快速检测挥发性农药地虫磷和福美铁的方法。将通过氧化还原法在 不锈钢片表面制备的金纳米膜作为表面增强拉曼光谱（SERS）基底，结合顶空固相萃取法对挥发性农药地虫磷 和福美铁进行检测。地虫磷和福美铁分别在 75 ℃和 55 ℃顶空固相萃取 15 min得到显著的拉曼光谱信号，检 出限（LOD）均为5 × 10－3 mg/L；地虫磷（999 cm－1 ）和福美铁（1 381 cm－1 ）的特征峰拉曼光谱强度与农药质量浓 度在一定范围内呈线性关系，相关系数R2 分别为0. 984 8和0. 977 8。采用本法对果汁中的地虫磷和福美铁进 行检测，回收率分别为93. 3%～112%和92. 5%～104%，相对标准偏差分别为4. 1%～5. 2%和3. 4%～6. 5%。该 方法快速、灵敏，在挥发性农药检测方面具有潜在的应用价值。 |
| 中文关键词:表面增强拉曼光谱 金纳米膜 顶空固相萃取 地虫磷 福美铁 |
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| Rapid Detection of Volatile Pesticides by Surface Enhanced Raman Spectroscopy with Headspace Solid Phase Extraction |
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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 |
| Key Words:surface-enhanced Raman spectrum gold nanofilm headspace solid phase extraction fonofos ferbam |
| 引用本文：王翠萍，王 山，张 欢，王纯荣.顶空固相萃取/表面增强拉曼法对挥发性农药的快速检测研究[J].分析测试学报,2021,40(8):1158-1163. |
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