Tenax-TA采样管 气相色谱法测定室内空气中TVOC

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气相色谱法测定室内空气中TVOC
气相色谱法测定室内空气中TVOC 详细信息：


Tenax-TA吸附剂化学名：2,6二苯呋喃多孔聚合物，表面积35m2/g；孔体积2.4cm3/g；平均孔径200nm；密度0.25g/cm3.
填充量：200mg
Tenax TA 热解析管（采样管）用于室内空气中总挥发性有机物(TVOC)的采集
Tenax TA 热解析管（采样管）符合国标GB50325-2010（2010版）对TVOC采样的要求，也可用于各科研院校对各种植物、昆虫等微量气体采样分析研究。可以满足HJ 583-2010  GB/T 14677-93  HJ/T 400 的采求。
规格：1/4*3.5英寸；6*150，6*90    特殊要求可定制。

浩瀚色谱（山东）应用技术开发有限公司研究了气相色谱法测定室内空气中总有机挥发物(TVOC)的几个主要影响因素。结果表明:采样体积的准确性对测定结果的真实性有很大影响;采样现场在封闭前由于少通风24 h;在气相色谱仪、热解吸仪条件参数下可得到理想的色谱图;解吸时间过长,会导致组分解吸率下降;采用极性毛细管色谱柱(PEG-20M型)可将对、间二甲苯组分峰完全分开;Tenax-TA采样管中的吸附剂粒度和吸附剂装管时的密实程度对组分在采样管上的吸附和解吸有影响;各组分的解吸率不同使得苯乙烯和苯的解吸率偏低;组分解吸率越低,结果偏差越大。


气相色谱法测定室内空气中TVOC  测试评价：




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: