Improved determination of salicylaldoxime in water samples by liquid-liquid extraction followed by high performance liquid chromatographic analysis

Abstract

For the determination of salicylaldoxime in environmental water samples, a stable and rapid method with low detection was proposed and established, based on the liquid-liquid extraction-high performance liquid chromatography with ultraviolet detector. Parameters including extraction solvent, ionic strength, solution pH, and extraction pattern were discussed for the optimal quantification of salicylaldoxime-spiked water. When the described method was applied to four spiked water samples, the obtained average extraction recovery rate was found between 87%–107% and relative standard deviation was below 6%. At the same time, good linear relationships were observed for spiked water samples from 0.01 to 10 μg/mL (R²=0.9993). In addition, the detection limit of salicylaldoxime was revealed between 0.003–0.008 μg/mL, which is two orders of magnitude lower than previously reported results. Thus, the presented method may be advantageous for the high-efficiency determination of salicylaldoxime in water samples.

Keywords

high-performance liquid chromatography / liquid-liquid extraction / salicylaldoxime

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