室内空气中总挥发性有机化合物（TVOC）测定Tenax TA 吸附管
室内空气中总挥发性有机化合物（TVOC）测定Tenax TA 吸附管 详细信息：
Tenax TA 吸附管 规格：美标1/4*3.5in，国产6*90, 6*120
应用： GB 50325-2010（民用建筑工程室内环境污染控制规范）
G.0.1 室内空气中的总挥发性有机化合物（TVOC）应按以下步骤进行测定：
1 应用 Tenax TA 吸附管采集一定体积的空气样品；
2 通过热解吸装置加热吸附管，并得到TVOC的解吸气体；
3 将TVOC的解吸气体注入气相色谱仪进行色谱分析，以保留时间定性，峰面积定量。
G.0.2 室内空气中的总挥发性有机化合物（TVOC）测定所需仪器及设备应符合下列规定：
1 恒流采样器：在采样过程中流量应稳定，流量范围应包含0.5L/min，并且当流量为0.5L/min时，应能克服5kPa～10 kPa之间的阻力，此时用皂膜流量计校准系统流量时，相对偏差不应大于±5%。
2 热解吸装置：能对吸附管进行热解吸，其解吸温度及载气流速应可调。
3 配备带有氢火焰离子化检测器的气相色谱仪。
4 石英毛细管柱：长度应为30 m～50m，内径应为0.32mm或 0.53mm，柱内涂覆二甲基聚硅氧烷的膜厚应为1μm～5μm；柱操作条件应为程序升温，初始温度为50℃，保持10min，升温速率5℃/min，温度升至250℃，保持2min。
5 1μL、10μL注射器若干个。
室内空气中总挥发性有机化合物（TVOC）测定Tenax TA 吸附管 测试谱图：
Determination of Total Volatile Organic Compounds (TVOC) in Indoor Air Tenax TA Adsorption Tube
Determination of Total Volatile Organic Compounds (TVOC) in Indoor Air Tenax TA Adsorption Tube Details:
Tenax TA adsorption tube Specification: American standard 1/4*3.5in, domestic 6*90, 6*120
Application: GB 50325-2010 (Code for Indoor Environmental Pollution Control of Civil Construction Engineering)
G.0.1 The total volatile organic compound (TVOC) in indoor air shall be determined according to the following steps:
1 Use Tenax TA adsorption tube to collect a certain volume of air sample;
2 Heat the adsorption tube through the thermal desorption device, and obtain the desorption gas of TVOC;
3 Inject the desorbed gas of TVOC into a gas chromatograph for chromatographic analysis, qualitatively by retention time and quantitatively by peak area.
G.0.2 The instruments and equipment required for the determination of total volatile organic compounds (TVOC) in indoor air shall meet the following requirements:
1 Constant current sampler: The flow should be stable during the sampling process, and the flow range should include 0.5L/min, and when the flow is 0.5L/min, it should be able to overcome the resistance between 5kPa and 10 kPa. At this time, use soap film When the flowmeter is calibrated to the system flow, the relative deviation should not be greater than ±5%.
2 Thermal desorption device: It can thermally desorb the adsorption tube, and its desorption temperature and carrier gas flow rate should be adjustable.
3 Equipped with a gas chromatograph with a hydrogen flame ionization detector.
4 Quartz capillary column: The length should be 30 m～50m, the inner diameter should be 0.32mm or 0.53mm, the film thickness of the dimethyl polysiloxane coated in the column should be 1μm～5μm; the column operating conditions should be programmed temperature, The initial temperature is 50°C, hold for 10 minutes, the temperature rise rate is 5°C/min, and the temperature rises to 250°C and hold for 2 minutes.
5 Several 1μL and 10μL syringes.
Determination of Total Volatile Organic Compounds (TVOC) in Indoor Air by Tenax TA Adsorption Tube Test Spectra: