Abstract：

Proposes an experimental method based on the mass balance theory. Combined with the change of the concentration in the whole vehicle, judges the contribution of interior materials to the concentration of the in-vehicle volatile organic compound (VOC) by changing the number of emission sources in the vehicle. Taking a real vehicle as a case, removes the key interior materials from the vehicle, and measures the VOC concentration variation during this process to determine the main emission sources. The results show that among the ten parts tested, the seat assembly is the largest contributor to the VOC concentration including benzene, toluene, xylene, ethylbenzene and styrene. In addition to the surface parts, the adhesives are the important sources for interior pollutants as well, which should be paid attention seriously.