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氣相色譜法測定室內空氣中TVOC
氣相色譜法測定室內空氣中TVOC 詳細信息：


Tenax-TA吸附劑化學名：2,6二苯呋喃多孔聚合物，表面積35m2/g；孔體積2.4cm3/g；平均孔徑200nm；密度0.25g/cm3.
填充量：200mg
Tenax TA 熱解析管（采樣管）用于室內空氣中總揮發性有機物(TVOC)的采集
Tenax TA 熱解析管（采樣管）符合國標GB50325-2010（2010版）對TVOC采樣的要求，也可用于各科研院校對各種植物、昆蟲等微量氣體采樣分析研究。可以滿足HJ 583-2010  GB/T 14677-93  HJ/T 400 的采求。
規格：1/4*3.5英寸；6*150，6*90    特殊要求可定制。

浩瀚色譜（山東）應用技術開發有限公司研究了氣相色譜法測定室內空氣中總有機揮發物(TVOC)的幾個主要影響因素。結果表明:采樣體積的準確性對測定結果的真實性有很大影響;采樣現場在封閉前由于少通風24 h;在氣相色譜儀、熱解吸儀條件參數下可得到理想的色譜圖;解吸時間過長,會導致組分解吸率下降;采用極性毛細管色譜柱(PEG-20M型)可將對、間二甲苯組分峰完全分開;Tenax-TA采樣管中的吸附劑粒度和吸附劑裝管時的密實程度對組分在采樣管上的吸附和解吸有影響;各組分的解吸率不同使得苯乙烯和苯的解吸率偏低;組分解吸率越低,結果偏差越大。


氣相色譜法測定室內空氣中TVOC  測試評價：




Determination of TVOC in Indoor Air by Gas Chromatography
Determination of TVOC in indoor air by gas chromatography. Details:


Tenax-TA adsorbent chemical name: 2,6 diphenylfuran porous polymer, surface area 35m2/g; pore volume 2.4cm3/g; average pore diameter 200nm; density 0.25g/cm3.
Filling amount: 200mg
Tenax TA thermal analysis tube (sampling tube) is used for the collection of total volatile organic compounds (TVOC) in indoor air
The Tenax TA thermal analysis tube (sampling tube) meets the requirements of the national standard GB50325-2010 (2010 version) for TVOC sampling, and can also be used for various scientific research institutions to sample and analyze various plants, insects and other trace gases. It can meet the requirements of HJ 583-2010 GB/T 14677-93 HJ/T 400.
Specifications: 1/4*3.5 inches; 6*150, 6*90, special requirements can be customized.

Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. has studied several main factors affecting the determination of total organic volatiles (TVOC) in indoor air by gas chromatography. The results show that the accuracy of the sampling volume has a great influence on the authenticity of the measurement results; the sampling site must be ventilated for at least 24 hours before being closed; the ideal chromatogram can be obtained under the best conditions of the gas chromatograph and thermal desorption instrument. ; Too long desorption time will lead to a decrease in the composition absorption rate; using a polar capillary column (PEG-20M type) can completely separate the para- and meta-xylene component peaks; the particle size and size of the adsorbent in the Tenax-TA sampling tube The degree of compaction of the adsorbent when the tube is installed has an impact on the adsorption and desorption of the components on the sampling tube; the different desorption rates of the components make the desorption rates of styrene and benzene lower; the lower the desorption rate of the group, the greater the deviation of the results Big.


Test evaluation for the determination of TVOC in indoor air by gas chromatography: 


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