基于连续光谱分析的滴定系统及其应用研究
Study of a Titration System Based on Continuous Spectral Analysis and Its Application
李长青 1陆道礼 1陈斌1
作者信息
- 1. 江苏大学食品与生物工程学院,江苏 镇江 212013
- 折叠
摘要
针对传统滴定分析过程中存在的检测精确度低、检测过程复杂和适用性不足等问题,设计一种基于连续光谱分析的自动滴定系统,以滚珠丝杠带动注射泵推杆运动控制为核心,通过可见光谱仪、自建数据算法、高精度滴定系统,研究滴定过程中溶液连续透射光谱与滴定液消耗体积的关系,用溶液光谱相关系数曲线的突变自动标识滴定终点.选取两种滴定类型对连续光谱滴定系统的精度和重复性进行测试,实验结果表明系统的整体相对误差小于0.5%、相对标准偏差小于0.3%,对比标准手动滴定的结果,提出系统的检测精度和重复性更好.
Abstract
To address the problems of low detection accuracy,complex detection process,and insufficient applicability of traditional titration analysis process,an automatic titration system based on continuous spectral analysis was designed.With the core of a ball screw-driven injection pump pushing rod motion control,a visible spectrometer,a self-built data algorithm,and a high-precision titration system were adopted to improve the efficiency and accuracy of titration analysis.The relationship between the continuous transmission spectrum of solution and consumed volume of titration solution was investigated,and the end point of titration was automatically identified via the abrupt change observed in the correlation coefficient curve of solution spectrum.In this study,two types of titration were selected to test the accuracy and repeatability of the continuous spectral titration system.Results indicate that the overall relative error of the system is less than 0.5%and relative standard deviation is less than 0.3%.Furthermore,the proposed system demonstrates superior detection accuracy and repeatability compared with standard manual titration.
关键词
光谱分析/终点判定/颜色测量/化学分析Key words
spectral analysis/end point determination/color measurement/chemical analysis引用本文复制引用
出版年
2024
NETL
NSTL
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