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连续提供低浓度蒸气含量混合气体的配制方法,目前较为广泛使用的是渗透法,此外还有慢速连续注入法、毛细管抽取蒸发法、饱和蒸气压法及蒸气扩散法等。这些方法各有利弊,这里不作赘叙。我们为了校准仪器,需连续配取一种微克/升(ppb级)范围的有机化合物蒸气混合气,为此设计制造了一台采用饱和蒸气压原理的动态发生装置。配气装置的技术指标
Continuous provision of low-concentration vapor content of the mixed gas preparation method, the more widely used is the infiltration method, in addition to slow continuous injection method, capillary extraction evaporation method, saturated vapor pressure and vapor diffusion method. These methods have their own advantages and disadvantages, not repeat them here. In order to calibrate the instrument, we continuously dispensed a vapor mixture of organic compounds in the microgram / liter (ppb) range. To this end, we designed and manufactured a dynamic generation device that uses the principle of saturated vapor pressure. Gas distribution device technical indicators