氟离子选择性电极测定粉煤灰中铝

Determination of aluminium in fly ash by fluorion selective electrode

本文研究了在pH5时,用氟离子选择性电极测定粉煤灰中铝的方法,并讨论了NaF加入量以及共存离子对测定结果的影响。研究结果表明:当NaF的加入量在6μg/mL左右时,ΔE与C(Al3+)线性关系良好(r=0 9998),线性范围为0～5μg/mL。应用此方法测定了粉煤灰中铝含量,结果令人满意(RSD=2 44%)。

A fluorion selective electrode method for the determination of aluminium in fly ash is studied.The concentration of NaF and the effect of existing ions on the determination results of aluminium are discussed.The results shown that a linear relationship of ΔE against C(Al^(3+)) is good (r=0.999?8) and the linear range is 0～5 μg/mL for Al when the concentration of NaF is about 6 μg/mL.The method has been applied to the determination of aluminium in fly ash with satisfactory results(RSD=2.44%).