Abstract：The content of aldoxime and ketoxime directly decided the extraction performance of hydroxyoxime copper extractants (hereinafter referred to as copper extractants). Therefore, it was meaningful to establish a simple and feasible method for the determination of aldoxime and ketoxime contents in LIX984N copper extractants. Since there were no certified reference materials of aldoxime and ketoxime, the pure aldoxime and ketoxime were prepared by semi-preparation method of liquid chromatography using LIX984N as material, which was then used as standard sample. The analysis method of aldoxime and ketoxime in hydrometallurgy LIX984N copper extractants by high performance liquid chromatography (HPLC) was established. The optimized HPLC parameters were as follows: the Chromatorex C18 (300 mm×30 mm×10 μm) reversed-phase column was used as semi-preparation column; the Chromatorex C18 (250 mm×4.6 mm×5 μm) reversed-phase column was used as analytical column; the mobile phase was methanol with flow velocity of 1.0 mL/min; the column temperature was room temperature; the wavelength of ultraviolet detector was 254 nm. The results showed that the mass concentration of aldoxime and ketoxime in range of 0.4 μg/mL-1.50 mg/mL had good linear relationship to the corresponding chromatographic peak area. The correlation coefficients were higher than 0.998. The detection limit of aldoxime and ketoxime was 0.12 and 0.15 μg/mL, and the low limit of determination was 0.4 and 0.5 μg/mL, respectively. The content of aldoxime and ketoxime in LIX984N copper extractant samples was determined according to the experimental method. The relative standard deviations (RSD, n=5) were less than 0.5%. The recoveries were between 94% and 129%.
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LIU Ben-fa, LIU Hai-bo. Determination of aldoxime and ketoxime in hydroxyoxime copper extractant of hydrometallurgy LIX984N by high performance liquid chromatography. , 2016, 36(10): 62-68.
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