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引 言作者用光度法研究了在不同浓度的二甲基亚砜(DMSO)-水(H_2O)溶液中,用石油亚砜(PSO)-四氯化碳(CCl_4)为萃取剂时对硫氰酸钼(V)络合物的萃取行为,研究了DMSO在该混合溶液中的量对该络合物萃取的影响,并对实验结果进行了解释.发现在DMSO-H_2O体积比为2%且NH_4 SCN溶液浓度达0.1mol/L时,硫氰酸钼的萃取率可达90%以上,表明MoO(SCN)_3这一萃取体系似具有应用价值.2 实验部分2.1 试剂与仪器 除硫氰酸铵溶液用银量法标定外,其余均由试剂直接称量配制成实验所需浓度的溶液,所用试剂均为分析纯.用721-100型光度计(上海第三分析仪器厂)测定.
INTRODUCTION The photometric method was used to study the effect of thiocyanate on the concentration of sulfoxide (PSO) - carbon tetrachloride (CCl_4) as extractant in different concentrations of dimethylsulfoxide (DMSO) - water (H_2O) The effect of the amount of DMSO in the mixed solution on the extraction of the complex was studied and the experimental results were explained.It was found that when the concentration of DMSO-H 2 O was 2% and NH 4 SCN solution concentration of 0.1mol / L, the extraction rate of molybdenum thiocyanate up to 90%, indicating that MoO (SCN) _3 this extraction system seems to have application value.2 Experimental 2.1 Reagents and instruments In addition to ammonium thiocyanate The solution was calibrated with the silver method, and the rest were directly weighed by the reagent preparation of the solution of the concentration required for the experiment, the reagents used were of analytical grade. Determination with 721-100 spectrophotometer (Shanghai Third Analytical Instrument Factory).