Jia Liyan, Yang Jingrui, Zhao Wenfei, Jing Xu
College of Food Science and Engineering, Shanxi Agricultural University Taigu Shanxi 030801 P. R. China
State Key Laboratory of Food Science and Technology, Nanchang University Nanchang Jiangxi 330047 China.
RSC Adv. 2019 Nov 11;9(63):36664-36669. doi: 10.1039/c9ra07348e.
A simple, rapid, and environmentally friendly approach was introduced to determine triazole fungicides in water samples by air-assisted ionic liquid dispersive liquid-liquid microextraction based on solidification of the aqueous phase using high-performance liquid chromatography-diode array detection. Ionic liquid was applied as the extraction solvent rather than a high-toxicity extraction solvent. The air-assisted dispersion method induced a trace amount of the ionic liquid to disperse as small droplets in the water sample, which significantly increased the contact area between the organic phase and the aqueous phase for the rapid transfer of target fungicides without using a dispersion solvent or auxiliary extraction devices. The solidification of the aqueous phase facilitated the collection of extraction solvent. The type of extraction solvent, the volume ratio of the extraction solvent to the water sample, the number of extraction cycles, the addition of NaCl, and pH values were evaluated. The recoveries were 72.65-100.13% with a relative standard deviation of 0.92% to 5.99%. The limits of quantification varied from 0.65 ng mL to 1.83 ng mL. This approach can be used to determine fungicides in ground, river, and lake water samples.
介绍了一种简单、快速且环保的方法，即基于水相凝固的空气辅助离子液体分散液液微萃取结合高效液相色谱 - 二极管阵列检测法来测定水样中的三唑类杀菌剂。使用离子液体作为萃取溶剂，而非高毒性的萃取溶剂。空气辅助分散法促使痕量离子液体以小液滴形式分散在水样中，这显著增加了有机相和水相之间的接触面积，从而无需使用分散溶剂或辅助萃取装置就能使目标杀菌剂快速转移。水相凝固便于收集萃取溶剂。对萃取溶剂的类型、萃取溶剂与水样的体积比、萃取循环次数、氯化钠的添加量以及pH值进行了评估。回收率为72.65% - 100.13%，相对标准偏差为0.92%至5.99%。定量限在0.65 ng/mL至1.83 ng/mL之间变化。该方法可用于测定地下水、河水和湖水样中的杀菌剂。
