造纸法烟草薄片浆液、白水及成品中铝的测定

Determination of aluminum in stock,white water and products of paper-making process tobacco sheet

采用氟离子选择电极法测定造纸法烟草薄片浆液、白水及成品中的铝。研究了影响测定结果的主要因素，确定了适宜的测定条件。结果表明：当F^-的初始浓度为1×10^-3mol／L时，电极电位（E）与铝量（ρ）线性关系良好（R=0．9996），线性范围为2．0～10．0μg／mL，回收率为84．71％～88．42％，RSD为0．57％～3．1％。该法通过控制溶液中氟离子浓度从而实现铝的测定，方法适合于样品中铝的分析。

The aluminum in stock, white water and products of paper-making process tobacco sheet was detennined by fluorine ion selective electrode. The results showed that the electrode potential has a linear relationship with the concentration of Al in the range of 2.0 - 10.0 μg/mL when the initial concentration of F^- was 1 × 10^-3 mol/L. The recoveries ranged from 84.71% to 88.42% with relative standard deviations of 0. 57% - 3.1%. Some other ions normally found in tobacco did not interfere with Al determination. The method showed simplicity, selectivity, reliability and rapidity and could be used for the determination of aluminum in paper-making process tobacco sheet.