Tenax-TA吸附采样管现货供应
Tenax-TA吸附采样管现货供应详细信息：
苯系物被国际癌症研究机构确认为有毒的致癌物质，苯、甲ben、二jia苯是环境空气主要污染物之一。由于苯属芳香烃类，使人一时不易警觉其毒性。人在短时间内吸入高浓度的甲ben、二jia苯时，可出现中枢神经系统麻醉作用，轻者有头晕、头痛、恶心、胸闷、乏力、 意识模糊等症状，严重者可致昏迷以致呼吸、循环衰竭而死亡。如果长时间接触一定浓度的甲ben、二jia苯会引起慢性中毒，可出现头痛、失眠、精神萎靡、记忆力减退等神经衰弱症。
因此，环境中苯系物测定的准确度对环境监测、评估和治理至关重要。目前，我国测定环境空气中苯系物的标准方法是“GB/T 14677-1993空气质量甲ben、二ben苯、苯乙烯的测定气相色谱法”，使用Tenax-TA吸附剂(Tenax-TA是一种多孔的高分子聚合物，化学名为聚2，6- 二苯基对苯醚)，Tenax-TA吸附剂的处理过程为采样管内充填0. 5g Tenax-TA吸附剂，新充填的采样管需在200°C条件下通氮气老化30min，氮气流量 100mL/min,每次采样前需对采样管加热通氮气处理，并经色谱检验无成分残留杂质，每次处理后，采样前后总计存放时间不应超过二天并避光保存。
浩瀚色谱（山东）应用技术开发有限公司建立了Tenax采样管富集气相色谱-质谱测定空气中痕量酚类化合物的方法.用Tenax采样管吸附环境空气中的痕量酚类化合物,用甲醇淋洗解吸酚类化合物,洗脱液加入萘-D8作为内标,利用气相色谱-选择离子监测质谱(GC-MS/SIM)进行检测,内标法定量.该方法定性、定量准确,线性响应良好,回归曲线的线性相关系数均大于0.999,平均回收率为92.4% ～102% ,测定干扰小,检测灵敏度高,按采样10 L计算,空气中zui低检测浓度可达0.001 mg/m3.用于实际样品测定,完全能满足环境空气中痕量酚类化合物监测的要求.
Tenax-TA吸附采样管现货供应 测试谱图：
Tenax-TA adsorption sampling tube wholesale
Tenax-TA adsorption sampling tube wholesale Details:
Benzene compounds are recognized as toxic carcinogens by the International Agency for Research on Cancer. Benzene, ben, and dibenzen are one of the main pollutants of ambient air. Because benzene is an aromatic hydrocarbon, it is difficult to be aware of its toxicity for a while. When a person inhales high concentrations of methylbenzyl and dibenzylbenzene in a short period of time, central nervous system anesthesia can occur. In mild cases, symptoms such as dizziness, headache, nausea, chest tightness, fatigue, and confusion can occur. In severe cases, it can cause coma and cause breathing. , Circulatory failure and death. If long-term exposure to a certain concentration of benzylben and dijiaben can cause chronic poisoning, headache, insomnia, malaise, memory loss and other neurasthenia may occur.
Therefore, the accuracy of the determination of benzene series in the environment is very important for environmental monitoring, evaluation and governance. At present, China's standard method for the determination of benzene series in ambient air is "GB/T 14677-1993 Air Quality Determination of Toluene, Dibenzen, and Styrene Gas Chromatography", using Tenax-TA adsorbent (Tenax-TA is A porous polymer, chemically named poly-2,6-diphenyl-p-phenylene ether), the processing process of Tenax-TA adsorbent is to fill the sampling tube with 0.5g Tenax-TA adsorbent, freshly filled sampling The tube needs to be aged with nitrogen for 30min at 200°C, and the nitrogen flow rate is 100mL/min. Before each sampling, the sampling tube needs to be heated and flowed with nitrogen, and the chromatographic inspection has no residual impurities. After each treatment, the total storage before and after sampling The time should not exceed two days and store in the dark.
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has established a method for the determination of trace phenolic compounds in the air by gas chromatography-mass spectrometry with Tenax sampling tube. The Tenax sampling tube is used to adsorb trace phenolic compounds in the ambient air, and methanol is used for leaching. Wash and desorb phenolic compounds, add naphthalene-D8 as an internal standard in the eluent, use gas chromatography-selected ion monitoring mass spectrometry (GC-MS/SIM) for detection, and quantify by internal standard method. This method is qualitatively and quantitatively accurate, and has a good linear response. , The linear correlation coefficients of the regression curves are all greater than 0.999, the average recovery rate is 92.4% to 102%, the measurement interference is small, the detection sensitivity is high, and the minimum detection concentration in the air can reach 0.001 mg/m3 by sampling 10 L. Sample determination can fully meet the requirements for monitoring trace phenolic compounds in ambient air.
Tenax-TA adsorption sampling tube wholesale test spectrum: