测定大气中氮氧化物时,一般将NO先氧化成NO_2来测定。一氧化氮的氧化方法通常有高锰酸钾-硫酸液体氧化剂和重铬酸钾-硫酸和氧化铬等的固体氧化剂方法,但都存在些问题,作者提出一个新的石英高温催化法,此法操作简单,氧化率高。将1 ppm的NO标准气(相对湿度50%,20℃)以200ml/分的流量在石英管中通过,石英管温度控制在100～700℃的不同范围,以化学发光法的自动测定仪测定各温度时的氧化率。试验了用真空电熔融法制成的和氢氧焰熔 Determination of nitrogen oxides in the atmosphere, the general oxidation of NO first NO2 to determine. Nitric oxide oxidation methods are usually potassium permanganate - sulfuric acid liquid oxidant and potassium dichromate - sulfuric acid and chromium oxide and other solid oxidants, but there are some problems, the authors propose a new quartz high temperature catalytic method, this method Simple operation, high oxidation rate. A 1 ppm NO standard gas (relative humidity 50%, 20 ° C) was passed through a quartz tube at a flow rate of 200 ml / min. The temperature of the quartz tube was controlled at different ranges of 100 ° C to 700 ° C by a chemiluminescence immunoassay The oxidation rate at each temperature. The vacuum electrofusion method and the oxyhydrogen flame melting were tested