提高“液体硫酸镍中镍含量的测定”的精密度

Improvement of Precision of "The Determination of Nickel Sulfate in Liquid Nickel Sulfate"

滴定分析的目的主要是用于准确测定常量组分。而准确度的高与低取决于在消除系统误差后精密度的好坏。本文结合实践教学,讨论了在不清楚是否消除系统误差的前提下,通过移液管与容量瓶相对校正、称取基准物和样品质量接近。

Titration analysis is primarily used to determine accurately constant component.The accuracy depends on the elimination of systematic errors.Based on practical teaching,this paper studies the methods to improve precision by relatively correcting pipette and flask,weighing reference material and sample mass close,changing the form of half drop operation,comparing colors,not knowing systematic errors are eliminated or not.