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Ultraviolet Spectrum Analysis of 1-methyl-3-butyl imidazole Tetrafluoroborate in Ethanol
Abstract:
1-methyl-3-butyl Imidazole chloride is prepared by 1methyl imidazole and chlorinated n-butane. BMIBF4 ionic liquid is prepared by BMIC and NaBF4 in the acetone. Scanning ionic liquid in 200~400nm wavelength range, get UV-spectrum curve. The ionic liquid used in the experiment has obvious absorption in 200~400nm wavelength range, and the maximum absorption wavelength determined by ultraviolet spectrometry method is 222nm. Linear regression equation is y =0.02311x+0.02861. Correlation coefficient is 0.99925, indicating there is high related degree between the solution concentration and the absorbance value. The linear range of BMIBF4 ionic liquid in the ethanol is 1-75 mg/L. Take samples randomly and have a repeated determination 5 times, the precision is RSD=0.25%, the recovery rate is between 97.4%~102%.
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3-6
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August 2013
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© 2013 Trans Tech Publications Ltd. All Rights Reserved
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