Measurement of VOCs with a Portable GC/SAW Detector

Abstract

This paper describes the determination of the concentrations of volatile organic compounds (VOCs) in two Slovak buildings. Qualitative measurements were performed using an electronic nose, zNose® 4300. This device has been developed by Electronic Sensor Technology. Technology consists of a combination of gas chromatography with SAW (Surface Acoustic Wave) detector. This model was chosen for measurement because it provides a relatively fast results and full portability. Quantitative measurements were performed using a photoionization detector with UV lamp, ppbRAE 3000. Previous studies of indoor air in buildings showed that the occupant behaviour and consumer products influence indoor air quality, as well as building structures and location of the house. Our measurements were focused on VOCs, which are currently an important group of chemical pollutants. Term VOCs includes a wide range of hydrocarbons possessing a characteristic ability to vaporize at room temperature. VOCs are emitted from a large range of well-known sources. For example, from building materials, household products, human activities, cleaning, smoking, or industrial emissions, exhaust from vehicles are some of the anthropogenic sources of VOCs in the outdoor environment which contribute to indoor VOCs. Increased attention is also given to them because they can have a negative impact on human health. This study was carried out on the basis of complaints (smell, headache, nausea) of a laboratory worker, who has an office in the model house. Thus, the aim of this work was to determine what substances cause referred complaints and their possible sources.