Acta Facultatis Ecologiae - Technická univerzita vo Zvolene

55Samples measured in small-space chamber withinner space 1 m 3 :gypsum plasterboard brick with the surface of0,2819 m 2− for testing there were three bricks with the sumof surfaces 0.8457 m 2 given in to the small-spacechamber; VOC emissions emitted by brickswere recalculated to the surface 1 m 2 (accordingto ISO 16000-1); ratio 1 m 2 to 1 m 3 of air in thechamberFig. 1 Gypsum plasterboardSamples measured in great-space chamber with theinner space, of 40 m 3− measuring of emissions emitted by furniture set28 days after construction;ratio 40 m 2 to 40 m 3 of air in chamberUsed equipment− short path thermal desorption tube, Silco tratedThermal Desorption Tube 786090-100, innerdiameter 4 mm, fill in with 100mg of TenaxTA (Scientific Instrument Services company)for collection of VOCs emissions emitted fromtested samples in to the air in chamber− air sampler Gilian – LFS 113 SENSIDINE withthe air flow 6 l.h –1 . and 12 l.h –1 ; the pump hasbeen calibrated in ČMI− gas chromatograph Agilent GC 6890 N withMS (mass spectrometer) detector 5973 with cryofocusation,thermal desorption and library ofspectra NIS 05, column type HP – 5 (AGILENTUSA)− VOC equipment small-space chamber (Smýkalcompany)− Great-space chamber (Weiss)Technical parameters of great and small-spacechamber for VOCs testingInner dimensions of great-space chamber40 m 3 (5.9 m x 2,82 m x 2,4 m)Inner dimensions of small-space chamber1 m 3 (0.7 m x 2,82 m x 2,4 m)Adjustable range of temperature in chamber15 to 50 °CRegulation accuracy of temperature in chamber>0.5 °CAdjustable range of humidity in chamber45 % to 55 %Regulation accuracy of temperature in chamber>2 %Air changing rate in great-space chamber40 m 3 per 1 hAir changing rate in small-space chamber1 m 3 per 1 hAir speed over the tested samples 0.1 to 0.3 m.s –1Tab. 3: Conditions of emissions VOC sampling in small space and great space chamberConditions of sampling Great-space chamber Small-space chamberTime of starting of furniture testing afterconstruction28 days 28 daysTime of acclimatization of samples in chamberbefore testing72 h 72 hSurface of tested samples 40 m 2 1 m 2Inner volume of chamber 40 m 3 1 m 2Ratio of tested surface to inner volume of thechamber1/1 1/1Temperature during the testing 23 °C 23 °CRelative humidity in chamber 50 % 50 %Air changing rate per hour 40 m 3 1 m 3Air speed in chamber over the samples 0,1 to 0,3 m/min 0,1 to 0,3 m/minTime of air sampling 6 h 6 hVolume of air pumped through the desorption tubeduring sampling36 l 36 l