【摘要】 建立了硫氰酸盐分光光度法测定聚四氢呋喃中微量磷钨酸的方法。回归方程A=0.040 09ρ+0.015 18,相关系数r2=0.999 6。钨质量浓度≤40μg/mL时,该方法的线性关系良好。聚四氢呋喃在750℃下灰化25 min后对测定结果无影响,两样品测定的相对标准偏差分别为1.89%和1.60%,加标回收率分别在101.2%-103.6%和96.8%-103.8%之间。更多还原

【Abstract】 A spectrophotometric method for the determination of phosphorictungsto acid in the polytetrahydrofuran was developed.Regression equation is A=0.040 09ρ+0.015 18,correlation coefficient r2=0.999 6.The linear range of determination is 0-40 μg/mL.The pretreatment of samples has no effect on the results of determination,the RSD are 1.89% and 1.60% respectively,and the recoveries range from 101.2%-103.6% and 96.8%-103.8% respectively.更多还原