Abstract
Now believed to be responsible for anaphylaxis to chemical substances, concentration of formaldehyde (HCHO) and volatile organic compounds (VOCs) given off by interior finishing materials and furniture is very low in residential spaces.To accurately measure this concentration, it is necessary to concentrate the air sample during sampling and to employ high-precision analyzers such as a gas chromatographic (GC) analyzer and a GC Mass Spectrometer (GC/MS) to obtain the results. Since these complicated sampling and analytical operations require a high-level of expertise, the development of an on-the-spot precise measuring instrument has long been awaited. This study examines the application of a semiconductor-based odor sensor capable of measuring andevaluating TVOC (total VOCs) levels in low concentrations quickly and in a timed sequence. To evaluate the characteristics of the sensor, the results of the measurements were compared with results obtained from a GC analyzer and/or a GC/MS. A relatively good correlation was obtained between the results, indicating the sensor can be used to develop an effective complementary system to enhance the analyzers.
