空气净化产品降解空气污染物效能的测定方法

Method for Determination of Efficiency of Degradation of Air Pollutants by Air Purifiers

提出了一种空气净化产品的降解空气污染物的测定方法。自行设计了合理的试验舱,以甲醛、甲苯、氨、甲硫醇和总有机挥发物(TVOC)等为目标物,采用高效液相色谱法(HPLC)测定甲醛,气相色谱-质谱法(GC-MS)测定甲苯、甲硫醇和TVOC,分光光度法测定氨。经过对试验舱气密性、目标污染物本底浓度的测试、初始浓度的选择、自然衰减测试及其回收率和稳定性、方法的重现性等多个参数的考察,证明该方法适用于对空气净化产品降解空气污染物的效果的测试,与国标方法作对比试验,表明两种方法的结果相近,但本方法的精密度较好。

An analytical method for the testing of efficiency of degradation of air pollutants by air purifiers and a self-designed testing chamber were proposed.Formaldehyde,toluene,ammonia,methyl mercaptan and total volatile organic compounds(TVOC)were selected as analytical objectives and determined by HPLC,GC-MS and spectrophotometry.Testing and inspection for air tightness of the chamber,and various parameters of the objective pollutants such as its base concentration,choice of initial concentration,natural attenuation,recovery,stability and reproducibility were carried out systematically.As shown by the experimental results,the proposed method was feasible to be used to evaluate the efficiency of air purifiers.A comparative study was made between the present method and the GB-standard method,giving similar and acceptable results,but better precision was attained by this method.