Temperature‐controlled ionic liquid dispersive liquid‐phase microextraction combined with HPLC with ultraviolet detector for the determination of fungicides |
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| Authors: | Yuanyuan Gao Qingxiang Zhou Guohong Xie Ziwei Yao |
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| Institution: | 1. College of Environmental Science and Engineering, Nankai University, , Tianjin, P. R. China;2. College of Geosciences, China University of Petroleum Beijing, , Beijing, P. R. China;3. College of Resources and Environment, Henan Institute of Science and Technology, , Xinxiang, P. R. China;4. National Marine Environmental Monitoring Centre, , Dalian, P. R. China |
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| Abstract: | Present study described a simple, environmental benign, easy to operate, and determination method for fungicides including thiram, metalaxyl, diethofencarb, myclobutanil, and tebuconazole. The method is based on temperature‐controlled ionic liquid dispersive liquid phase microextraction coupled to HPLC with ultraviolet detector. In the enrichment procedure, ionic liquid 1‐octyl‐3‐methylimidazolium hexafluorophosphate C8MIM]PF6] was used as the extraction solvent. Variable affecting parameters such as the volume of C8MIM]PF6], temperature, extraction time, centrifuging time, and salting‐out effect have been optimized in detail. Under the optimal conditions, this method has been found to have good linear relationship in the concentration range of 1.0–100 μg/L and excellent detection sensitivity with LODs (S/N = 3) in the range of 0.32–0.79 μg/L. Precisions of proposed method were in the range of 3.7–5.9% for intraday and 7.8–11.0% for interday (RSDs, n = 6). The proposed method was used for the analysis of real water samples and good spiked recoveries at two different spiked levels were achieved in the range of 84.6–102%. |
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| Keywords: | Fungicides HPLC 1‐Octyl‐3‐methylimidazolium hexafluorophosphate Temperature‐controlled ionic liquid dispersive liquid‐phase microextraction |
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