氨氮测定中光电检测器的选择

根据朗伯-比尔定律，在全自动氨氮测定仪的研制中，是通过吸光度的测量来检测氨氮溶液的浓度的。但由于在实际情况中光强信号是不方便直接测量的量，所以就需要将光信号变为可测量的电信号，再通过对电信号的分析来确定溶液的氨氮浓度的。参考实际的测量条件，选择适合氨氮检测系统的光电检测器，可以有效提高整个系统的精度和准确性。本文通过实验对光电池与光电管的稳定性和线性度进行比较，选择一种更适合氨氮测定系统的光电检测器。

Choice of photoelectric detector in NH3-N analyze

In the NH_3-N analyze examination by Lambert-the Bill law,is examines the NH_3-N solution density through the extinction survey the density.But luminous intensity signal not convenient direct measurement,therefore needs to become the measurable quantity through the electro-optical detector the electrical signal.The reference measure condition,the choice suits system's electro-optical detector,may increase system's precision and the accuracy.This article carries on the comparison through the experiment to th...