Anhydrous LiCl and Urea were mixed according to different proportion.The temperature of phase transition was determined by melting point tube method while they still keep satisfactory conductivity.According to the ana...Anhydrous LiCl and Urea were mixed according to different proportion.The temperature of phase transition was determined by melting point tube method while they still keep satisfactory conductivity.According to the analysis of its phase diagram,the eutectic point was 55℃ with the molar proportion of LiCl 0.225,while its electrochemistry window was about 2.4V and shows good behavior of ionic liquids.展开更多
Ionic liquid(IL),1-butyl-3-methylimdazoliuim chloride,was introduced into the chromazural S-aluminium spectrophotometric system for the first time which involves Triton X-100 as solubilizing agents.The presence of IL ...Ionic liquid(IL),1-butyl-3-methylimdazoliuim chloride,was introduced into the chromazural S-aluminium spectrophotometric system for the first time which involves Triton X-100 as solubilizing agents.The presence of IL resulted in a sensitivity increase of about 50%.Besides,IL also helped to eliminate the spume resulting from surfactant,which usually makes the analysis inconvenient.Molar absorptivity of the proposed system is 1.2×105 L·mol-1 ·cm-1 and maximum absorption wavelength occurred at 616 nm.Based on 3σ criterion,detection limit of 0.0016μg·mL-1 was obtained and Beer’s law was obeyed in the range of 0.002 μg·mL-1-0.2 μg·mL-1.The proposed method has been successfully applied to the determination of Al in tap water and food samples,with analytical results in good agreement with those by ICP-OES.The results of this study revealled that IL might be a potential sensitizer for spectrophotometric methods involving micellar media.展开更多
文摘Anhydrous LiCl and Urea were mixed according to different proportion.The temperature of phase transition was determined by melting point tube method while they still keep satisfactory conductivity.According to the analysis of its phase diagram,the eutectic point was 55℃ with the molar proportion of LiCl 0.225,while its electrochemistry window was about 2.4V and shows good behavior of ionic liquids.
文摘Ionic liquid(IL),1-butyl-3-methylimdazoliuim chloride,was introduced into the chromazural S-aluminium spectrophotometric system for the first time which involves Triton X-100 as solubilizing agents.The presence of IL resulted in a sensitivity increase of about 50%.Besides,IL also helped to eliminate the spume resulting from surfactant,which usually makes the analysis inconvenient.Molar absorptivity of the proposed system is 1.2×105 L·mol-1 ·cm-1 and maximum absorption wavelength occurred at 616 nm.Based on 3σ criterion,detection limit of 0.0016μg·mL-1 was obtained and Beer’s law was obeyed in the range of 0.002 μg·mL-1-0.2 μg·mL-1.The proposed method has been successfully applied to the determination of Al in tap water and food samples,with analytical results in good agreement with those by ICP-OES.The results of this study revealled that IL might be a potential sensitizer for spectrophotometric methods involving micellar media.
