This study has demonstrated the utility of this monitoring system, we can measure tens of VOC simultaneously. We therefore conclude that the methods developed are useful for monitoring distributions of VOCs in cities in the developed and developing countries, and are able to describe variations in VOC day by day, season by season and spatially. There seems to be no impediment to this system being applied to measure personal exposure and indoor pollution VOCs. This should in turn lead to better quantified risk assessments of VOCs.