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试验所用La(SCN)_3·7H_2O的制取已在文献中述及。安替比林系采用化学纯试剂重结晶得到。用标准EDTA溶液定镧确定La(SCN)_3的含量,C_(11)H_912)ON_2含量的测定用碘量法,在测定C_(11)H_(12)ON_2的含量之前,加入适量EDTA将La~(3+)掩蔽。使用溶解度等温法研究体系的相平衡,将所配的复体放在0℃的冰水浴中,搅拌平衡。溶液的折光指数值及化学分析结果表明,体系20昼夜可达平衡。静置后取样分析。平衡相的组成用Schreinemakers湿渣法确定,并用干燥后的平衡相的化学分析加以确证。所有计量仪器均校正。
La (SCN) _3 · 7H_2O used in the experiment has been described in the literature. Antipyrine was chemically recrystallized reagent obtained. Determination of La (SCN) _3 and C_ (11) H_912) ON_2 with standard EDTA solution Determination of ON_2 with iodine Before the determination of the content of C_ (11) H_ (12) ON_2, ~ (3+) masking. The solubility of isobaric method was used to study the phase equilibrium of the system. The complex was placed in an ice-water bath at 0 ° C and stirred for equilibration. The refractive index of the solution and the chemical analysis showed that the system reached equilibrium in 20 days and nights. After standing sample analysis. The composition of the equilibrium phase was determined using the Schreimerkers wet scrubbing method and confirmed by chemical analysis of the dried equilibrium phase. All measuring instruments are calibrated.