Analysis of pyraflufen-ethyl residues in apples and soil by high-performance liquid chromatography |
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| Authors: | Huili Wang Jiye Hu Hongxun Zhang Changlong Chen Xuyan Chen |
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| Affiliation: | Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , 18 Shuangqing Road, Haidian District, Beijing 100085, China |
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| Abstract: | Abstract Detailed procedures are provided for preparing packed cadmium columns to reduce nitrate to nitrite. Experiments demonstrated the importance of conditioning both open tubular cadmium reactor (OTCR) and packed copper-coated cadmium columns to achieve 100% reduction efficiency. The effects of segmentation bubbles in the OTCR upon reduction efficiency and baseline noise in nitrate analysis are investigated using an auto-analyzer. Metal particles derived from segmentation bubbles in OTCR result in interference with continuous flow analyses. Therefore packed columns are recommended for determination of low level nitrate in natural waters. |
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| Keywords: | Pyraflufen-ethyl Apple Soil Dissipation Solid-phase extraction HPLC |
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