基于反射式光度传感器的自动光度滴定仪的研制及应用

Preparation and Application of Automatic Photometric Titration Analyzer Based on Reflective Photometric Sensor

研制了一种以颜色变化为滴定终点的自动光度滴定仪,仪器以光度传感器为核心,包括光度探头、滴定装置、AT89S52单片机、电磁阀、二极管和磁力搅拌器等部件。传感器采用开放设计,对溶液吸光度变化反应迅速。仪器用于红醋酸度的测定,所得结果与电位滴定分析法结果相符。

An automatic photometric titration analyzer with color change as end point of titration was prepared. The analyzer consisted of reflective photometric sensor （as core）, photometric probe, titration device, AT89S52 monolithic circuit, electromagnetic valve, diode and magnetic stirrer. The open design of sensor leaded to detect the absorbance of solution without delay in titration. The analyzer was applied in the determination of acidity of red vinegar, and the results obtained were in consistency with those obtained by potentiometric titration.