Combination of ionic liquid dispersive liquid-phase microextraction and high performance liquid chromatography for the determination of triazine herbicides in water samples

Abstract

Abstract A temperature-controlled ionic liquid dispersive liquid-phase microextraction in combination with high performance liquid chromatography was developed for the enrichment and determination of triazine herbicides such as cyanazine, simazine, and atrazine in water samples. 1-Octyl-3-methylimidazolium hexafluorophosphate ([C 8 MIM][PF 6 ]) was selected as the extraction solvent. Several experimental parameters were optimized. Under the optimal conditions, the linear range for cyanazine was in the concentration range of 0.5–80 μg/L and the linear range for simazine and atrazine was in the range of 1.0–100 μg/L. The limit of detection (LOD, S/N = 3) was in the ranges of 0.05–0.06 μg/L, and the intra day and inter day precision (RSDs, n = 6) was in the ranges of 3.2%–6.6% and 4.8%–8.9%, respectively. Four real water samples were analyzed with the developed method, and the experimental results showed that the spiked recoveries were satisfactory. All these exhibited that the developed method was a valuable tool for monitoring such pollutants.