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Silica Microspheres for SPE and Determination of Fungicides in Water by LC |
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| Authors: | Qingxiang Zhou Yuanyuan Gao Junping Xiao Guohong Xie |
| Affiliation: | 1. State Laboratory of Petroleum Resource and Prospecting, College of Geosciences, China University of Petroleum, Beijing Campus (CUP), Beijing, 102249, China 2. Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, School of Chemistry and Environmental Sciences, Henan Normal University, Xinxiang, 453007, China 3. Department of Chemistry, University of Science and Technology Beijing, Beijing, 100083, China 4. College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, 453003, China |
| Abstract: | A new method has been developed for the determination of metalaxyl, myclobutanil, and tebuconazole in environmental water samples with preconcentration by cartridges packed with SiO2 microspheres prior to LC. Several parameters such as the volume and composition of eluent, sample flow rate, sample pH, and sample volume were optimized. Under the optimal conditions, excellent detection limits (S/N = 3) and precision (RSD, n = 6) were 0.02 ng mL?1, 1.3% for metalaxyl, 0.02 ng mL?1, and 2.4% for myclobutanil and 0.08 ng mL?1 and 4.3% for tebuconazole, respectively. The method was applied to the analysis of real-water samples, and satisfactory results were obtained. The average spiked recoveries were in the range of 86.3–97.5%. These results indicate that SiO2 microspheres have great potential to be used as a novel solid phase extraction adsorbent that could have wide applications in the environmental field. |
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