。將初始柱溫從5 0℃提高到70℃,不設(shè)停留時(shí)間,終止溫度從2 5 0℃降為2 30℃,可以將樣品分析時(shí)間由5 5min縮短到32min而對分析結(jié)果幾乎沒有影響。


Tenax-TA吸附管測定室內(nèi)TVOC污染物 圖片：




Determination of indoor TVOC pollutants by Tenax-TA adsorption tube
Tenax-TA adsorption tube for measuring indoor TVOC pollutants

Stationary Phase: Tenax-TA
Particle size: 60-80 mesh
Specifications: 1/4*3.5 inches, 6*150mm, 6*90, packing 200mg, other specifications can be customized
Material: glass, stainless steel
Application: GB_50325-2010_Code for indoor environmental pollution control of civil construction projects

Tengzhou Haohao Chromatography Instrument Technology Service Co., Ltd. studied the main factors affecting the determination of TVOC (total volatile organic compounds) in indoor air by gas chromatography. If the flow rate does not reach 0. 5L min during the sampling process, the final sampling volume can reach 10L by extending the sampling time. The ventilation time is extended before sampling to make the indoor and outdoor air convect fully, which is beneficial to the diffusion of residual pollutants in the room and can reflect the re-enclosure. The actual concentration of post-organic volatiles released during the 1 h period. The thermal desorption rate of each component of TVOC is related to the molecular weight and polarity of the component; the thermal desorption rate decreases with the extension of the desorption time, and it is suitable for 1 to 3 minutes in the operation. Increasing the initial column temperature from 50 °C to 70 °C without stopping time, the termination temperature was reduced from 250 °C to 2 30 °C, and the sample analysis time was shortened from 55 min to 32 min with little effect on the analytical results.


Determination of Indoor TVOC Contaminants by Tenax-TA Adsorption Tube