论文部分内容阅读
概述二氧化氮(NO_2)是一种棕色有毒气体,具有强烈的刺激性、腐蚀性和可吸附性。我国工业卫生标准规定NO_2浓度不允许超过5mg/m_3,即相当于2.5ppm。大气中氮氧化物浓度为0.02至0.15PPm。测定NO_2的方法主要有比色法、检测管法、库仑法和化学发光法等。1974年美国Blurton等人首先提出控制电位电解气体成份监测仪。此后,美、日等国家相继研制并生产了CO、NO_2、NO、SO_2、H_2S等系列气体监测仪。作者所研制的二氧化氮监测仪亦依据了上述基本原理。在此基础上改变实验条件后尚可用以测量一氧化碳、硫化氢、
Overview Nitrogen dioxide (NO 2) is a brown toxic gas with a strong irritant, corrosive and adsorbable properties. China’s industrial hygiene standards NO 2 concentration does not allow more than 5mg / m_3, which is equivalent to 2.5ppm. Atmospheric nitrogen oxides concentration of 0.02 to 0.15PPm. Determination of NO 2 methods are colorimetric, detection tube method, coulometry and chemiluminescence and so on. In 1974, Blurton et al first proposed the control potential electrolytic gas composition monitor. Since then, the United States, Japan and other countries have developed and produced CO, NO_2, NO, SO_2, H_2S series of gas monitors. The nitrogen dioxide monitor developed by the author is also based on the above basic principle. On this basis, after changing the experimental conditions can still be used to measure carbon monoxide, hydrogen sulfide,