影响NO_x标准曲线斜率偏低的探讨

Probe on Influencing the Inclination of the Standard Curve of Nitrogen Oxides Lower

通过对ＮＯｘ标准工作曲线的统计分析及对比试验，找出了影响ＮＯｘ标准工作曲线斜率偏低因素的关键是高浓度点的吸光度偏低。而影响高浓度点吸光度斜率偏低的因素是显色时间与显色温度。提出了当温度低时应适当延长显色时间，以消除这两个因素的影响。

Through the statistics and the analysis on the standard working curve of Nitrogen Oxides as well as contrast experiments,the key of the factors which influenced the inclination of the working curve of Nitrogen Oxides lower was that the absorptance of high concentration point is lower,and the factors that effected the absorptance inclination of high concentration point lower were color time and color temperature.Color time should be prolonged properly when temperature is low in order to eliminate the effects of the two factors.