固定相：Tenax-TA

粒度：60-80目

規(guī)格：1/4*3.5英寸，6*150mm，6*90，填料200mg，其他規(guī)格可定制

材質(zhì)：玻璃，不銹鋼

應(yīng)用：GB_50325-2010_民用建筑工程室內(nèi)環(huán)境污染控制規(guī)范

滕州市浩瀚色譜儀器技術(shù)服務(wù)有限公司，研究了影響氣相色譜法測定室內(nèi)空氣中TVOC(總揮發(fā)性有機化合物)濃度的主要因素。采樣過程中如流量達不到0 . 5L min ,可通過延長采樣時間使終采樣體積達到10L ;采樣前延長通風(fēng)時間使室內(nèi)外空氣充分對流,有利于室內(nèi)殘留污染物質(zhì)的擴散,能反映重新封閉后有機揮發(fā)物1h時段內(nèi)釋放的實際濃度。TVOC各組分的熱解吸率與該組分的分子量和性有關(guān);熱解吸率隨解吸時間的延長而降低,操作中以1～3min比較合適。將初始柱溫從5 0℃提高到70℃,不設(shè)停留時間,終止溫度從2 5 0℃降為2 30℃,可以將樣品分析時間由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