【摘要】 在甲醇溶剂中,锌试剂与锌离子生成稳定的蓝色络合物,采用可见分光光度法能够测定室温离子液体1-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)中锌离子的含量.在波长639 nm处,锌离子的浓度在0.324~0.891 mg.L-1之间与吸光度成良好的线性关系,符合朗伯-比尔定律,线性回归得方程:A=0.307 61 C(mg.L-1)-0.018 25,R=0.998 6,摩尔吸光系数:2.01×104L.mol-1.cm-1.该方法重现性良好,误差<3.31%,相对标准偏差:1.92%,平均回收率:99.55%.更多还原

【Abstract】 In methanol solvent,Zn²⁺ can form a stable blue chelate complex with zincon,this is a basis for the determination of zinc in ionic liquid（1-butyl-3-methylimdazolium tetrafluoroborate） by spectrophotometery.The concentration of Zn²⁺(from 0.324 mg·L^-1 to 0.891 mg·L^-1) and its absorbance show a better linear relationship,which accords with Lambert-Beer’s law.At measure wavelength 639 nm,the linear regression equation is A=0.307 61 C(mg·L^-1)-0.018 25,R=（0.998 6）,with molar absorptivity is 2.01×10⁴L· mol^-1·cm^-1.The repeatability is satisfactory,the error is less than（3.31%）,the relative standard deviation is 1.92%,the average percent recovery is 99.55%.更多还原