Tenax-TA吸附管采样管联合 气相色谱-质谱仪测定密闭环境苯系物

气相色谱-质谱仪测定密闭环境苯系物，液化石油气，二甲醚，甲缩醛，乙缩醛，乙醇，室内空气，焦炉煤气，炼厂气，天然气，变压器油，多氯联苯，植物油，增塑剂，塑化剂，消毒剂，氨水

气相色谱-质谱仪测定密闭环境苯系物
气相色谱-质谱仪测定密闭环境苯系物 详细信息：

Tenax TA 热解析管/采样管：100mg,150mg,200mg三种规格填料

不锈钢管/玻璃管：150mg,200mg两种规格填料

Tenax TA 热解析管/采样管/用于室内空气中总挥发性物(TVOC)的采集，内装美国原装进口Tenax-TA吸附剂,  1/4*3.5英寸 ，6mm*150mm，6*90，特殊规格可定做。

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 的采样要求。

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.

浩瀚色谱（山东）应用技术开发有限公司研究考察了在常温和冷藏条件下放置不同时间(4小时和24小时)对采样后Tenax-Ta管中苯浓度的影响。使用Tenax-Ta管采集配气平台中的苯,共采集24根,采样后分别在常温和冷藏条件下放置4小时和24小时后使用气相色谱进行分析,以保留时间定性,峰面积定量。结果表明,不论储存时间长短,在冷藏条件下的Tenax-Ta管测得的苯浓度均要高于在常温条件下放置的的Tenax-Ta管,同时前者测得的苯浓度的分布情况也要好于后者,也就是变异系数小于在常温情况下放置的Tenax-Ta管。这是因为在常温条件下Tenax-Ta管中吸附的污染物会有部分解析从而导致测得的数据较低,并且导致数据分布较大,因此采样结束后应当将Tenax-Ta管放入装有冰袋的保温箱中保存并且尽快分析。

探讨Tenax-TA吸附管对密闭环境中苯系物的吸附性能。方法依据《室内空气质量标准》总挥发性有机物的测定方法和美国EPA TO-17标准方法,用Tenax-TA吸附管对配制的苯系物标准气体进行采样,以保留时间定性,峰面积定量。结果该方法对苯系物测定的相对标准偏差在4.50%～9.51%之间,苯、甲苯、对二甲苯、邻二甲苯的低检出浓度分别为0.04,0.65,0.50和1.60μg/m3。当采样体积不大于3 L时,Tenax-TA采样管没有穿透现象发生,苯系物通过Tenax-TA管吸附采样后在室温下可以保存40 d。结论 Tenax-TA吸附管对苯系物具有良好的吸附性能,而且设备简单,样品保存时间长,适合于一些特殊环境中气体的采集。


气相色谱-质谱仪测定密闭环境苯系物 测试评价：


Determination of Benzene Series in Confined Environment by Gas Chromatography-Mass Spectrometer
Gas Chromatography-Mass Spectrometer Determination of Benzene Series in Confined Environment


Tenax TA thermal analysis tube/sampling tube: 100mg, 150mg, 200mg three specifications of packing

Stainless steel tube/glass tube: 150mg, 200mg two specifications of packing

Tenax TA Thermal Desorption Tube/Sampling Tube/Used for the collection of total volatile compounds (TVOC) in indoor air, with Tenax-TA adsorbent imported from the United States, 1/4*3.5 inches, 6mm*150mm, 6*90, special Specifications can be customized.

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 sampling requirements of HJ 583-2010 GB/T 14677-93 HJ/T 400.

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.



Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. researched and investigated the effect of storage for different times (4 hours and 24 hours) under normal temperature and cold storage conditions on the concentration of benzene in Tenax-Ta tubes after sampling. Tenax-Ta tubes were used to collect benzene in the gas distribution platform. A total of 24 pieces were collected. After sampling, they were placed under normal temperature and refrigerated conditions for 4 hours and 24 hours and then analyzed by gas chromatography. The retention time was qualitatively and the peak area was quantified. The results show that regardless of the length of storage time, the benzene concentration measured by the Tenax-Ta tube under refrigerated conditions is higher than that of the Tenax-Ta tube placed under normal temperature conditions, and the distribution of the benzene concentration measured by the former is also better. In the latter, the coefficient of variation is smaller than the Tenax-Ta tube placed at room temperature. This is because under normal temperature conditions, the contaminants adsorbed in the Tenax-Ta tube will be partially resolved, resulting in lower measured data and larger data distribution. Therefore, the Tenax-Ta tube should be placed in the tube after sampling. Store it in an incubator with an ice pack and analyze it as soon as possible.

Discuss the adsorption performance of Tenax-TA adsorption tube for benzene series in a closed environment. Methods According to the "Indoor Air Quality Standards" total volatile organic compounds determination method and the US EPA TO-17 standard method, the prepared benzene series standard gas was sampled with Tenax-TA adsorption tube, and the retention time was qualitatively and the peak area was quantified. Results The relative standard deviation of the determination of benzene series by this method was between 4.50% and 9.51%. The minimum detectable concentrations of benzene, toluene, p-xylene and o-xylene were 0.04, 0.65, 0.50 and 1.60μg/m3, respectively. When the sampling volume is not more than 3 L, the Tenax-TA sampling tube does not penetrate, and the benzene series can be stored for 40 d at room temperature after being absorbed and sampled by the Tenax-TA tube. Conclusion Tenax-TA adsorption tube has good adsorption performance for benzene series, and the equipment is simple, the sample storage time is long, and it is suitable for gas collection in some special environments.


Gas Chromatography-Mass Spectrometer Determination of Benzene in Confined Environment Test evaluation: