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介绍一种设计新颖、结构简单、体积小巧和操作方便的光度滴定装置。探头是由一根具有一个公共端和三个分支的光纤束构成的。白炽灯、二块干涉滤色片和二只硅光电二极管分别作为可见辐射光源、色散元件和光电转换器。采用双波长光学系统。配以自动滴定管和滴定记录仪,实现了光度滴定的半自动化。在测定的准确度、精密度、测量范围和消除待测溶液的浊度和色度干扰方面,其性能均优于其它光度滴定仪。本仪器已成功地应用于各类水样中钙和镁的测定。
A photometric titration device with novel design, simple structure, compact size and convenient operation is introduced. The probe consists of a fiber bundle with a common end and three branches. Incandescent lamp, two interference filters and two silicon photodiodes as visible radiation source, dispersive element and photoelectric converter respectively. Dual wavelength optical system. Equipped with automatic burette and titration recorder, to achieve the semi-automatic photometric titration. Its performance is superior to other photometric titrators in determining the accuracy, precision, measurement range and eliminating the turbidity and chromatic interference of the solution to be tested. The instrument has been successfully applied to various types of water samples of calcium and magnesium determination.