引用本文:
邓思怡, 李乐, 陈广慧, 詹顺泽. 滴定终点误差的来源及其实践意义[J]. 大学化学,
2026, 41(4): 433-437.
doi:
10.12461/PKU.DXHX202502067
Citation: Siyi Deng, Le Li, Guanghui Chen, Shunze Zhan. Sources of Titration Endpoint Error and Their Practical Significance[J]. University Chemistry, 2026, 41(4): 433-437. doi: 10.12461/PKU.DXHX202502067
Citation: Siyi Deng, Le Li, Guanghui Chen, Shunze Zhan. Sources of Titration Endpoint Error and Their Practical Significance[J]. University Chemistry, 2026, 41(4): 433-437. doi: 10.12461/PKU.DXHX202502067
滴定终点误差的来源及其实践意义
English
Sources of Titration Endpoint Error and Their Practical Significance
Abstract:
Endpoint error (Et) represents a critical concept in analytical chemistry education. Conventionally, the difference (EIn) between an indicator's theoretical color transition point and the stoichiometric point has been regarded as the exclusive source of endpoint error. This study introduces an additional source of endpoint error—Eld, arising from the last drop of titrant during practical titration operations. This systematic error exhibits positive values with inherent uncertainty within a defined range. We comprehensively analyze the impact of this error on overall endpoint error and re-examine the interrelationships among titration jumps, endpoint error, and indicator transition points. These findings provide enhanced theoretical guidance for optimizing titration conditions and improving measurement accuracy.
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Key words:
- Titration analysis
- / Endpoint error
- / The last drop
- / Titration jump
- / Error analysis
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