【摘要】 由于很多监测机构或工业园区,购买了环境大气NMHC在线监测仪器,但使用HJ604的方法对仪器进行比对验收,比对结果存在极大的误差,导致对仪器的验收不通过。本文参考了HJ-759与TO-15的方法,对其进行改进后,提出一仪器比对验收的实验构想:利用相同的校准气体与检测器,三级冷冻预浓缩仪做前处理进样,苏玛罐采样,模拟在线仪器的检测,对所有化合物的色谱峰进行加和后再做定量,在实验室进行比对分析。该方法提供更低的检测下限,同时兼顾到对低碳化合物的检测,能更加准确的检测、还原环境大气或厂界大气的真实浓度,为在线环境大气NMHC监测仪器的比对验收工作提供参考。更多还原

【Abstract】 As a result of a number of testing agencies or factories, the purchase of atmospheric environmental NMHC online monitoring instruments.However, HJ-604 method was used to conduct comparison and acceptance of the instrument, and there was a great error in the comparison result, which led to the failure of acceptance of the instrument. This paper reference HJ-759 and TO-15 method, after the improvement, to put forward a instrument than the method of comparison: use the same calibration gases and detector, level 3 frozen do pretreatment sample preconcentration device, SUMMA sampling, simulation of the online instrument testing, for all compounds chromatographic peak add and then do the quantitative analysis in lab.This method can provide a lower detection lower limit, while taking into account the detection of low carbon compounds, can more accurately detect and restore the true concentration of environmental atmosphere or plant boundary atmosphere, and provide a reference for the comparison and acceptance of online NMHC monitoring instruments.更多还原