A new method for the separation of ion association complex of gold(Ⅲ) chloride rhodamine B by aqueous biphasic extraction system of n propyl alcohol (NH 4) 2SO 4 water was investigated.The experimental results indica...A new method for the separation of ion association complex of gold(Ⅲ) chloride rhodamine B by aqueous biphasic extraction system of n propyl alcohol (NH 4) 2SO 4 water was investigated.The experimental results indicate that the method can extract Au(Ⅲ) in hydrochloride medium.The extraction ratios of Au(Ⅲ) is 99.2%.The proposed method can separate Au from Fe,Al,Pb,Zn,Ca,et al base metals and was used for the separation of synthetic sample and the samples of anode slime and place gold.展开更多
A new method was developed for the determination of cefradine by extraction-flotation of CuSCN. The experiment indicated that in the presence of 0.20 mol/L NaOH the degradation of cefradine took place in water bath at...A new method was developed for the determination of cefradine by extraction-flotation of CuSCN. The experiment indicated that in the presence of 0.20 mol/L NaOH the degradation of cefradine took place in water bath at 100 ℃. The thiol group （-SH） of the degradation product could reduce Cu（Ⅱ） to Cu（Ⅰ） for the formation of the emulsion CuSCN in the presence of NH4SCN at pH 4.0. By determining the residual amount of Cu（Ⅱ） in the solution and calculating the flotation yield of Cu（Ⅱ）, the indirect determination of cefradine can be obtained. This method has been applied to determine cefradine in capsules, human serum and urine samples, respectively.展开更多
文摘A new method for the separation of ion association complex of gold(Ⅲ) chloride rhodamine B by aqueous biphasic extraction system of n propyl alcohol (NH 4) 2SO 4 water was investigated.The experimental results indicate that the method can extract Au(Ⅲ) in hydrochloride medium.The extraction ratios of Au(Ⅲ) is 99.2%.The proposed method can separate Au from Fe,Al,Pb,Zn,Ca,et al base metals and was used for the separation of synthetic sample and the samples of anode slime and place gold.
文摘A new method was developed for the determination of cefradine by extraction-flotation of CuSCN. The experiment indicated that in the presence of 0.20 mol/L NaOH the degradation of cefradine took place in water bath at 100 ℃. The thiol group （-SH） of the degradation product could reduce Cu（Ⅱ） to Cu（Ⅰ） for the formation of the emulsion CuSCN in the presence of NH4SCN at pH 4.0. By determining the residual amount of Cu（Ⅱ） in the solution and calculating the flotation yield of Cu（Ⅱ）, the indirect determination of cefradine can be obtained. This method has been applied to determine cefradine in capsules, human serum and urine samples, respectively.
