浅析室内空气中TVOC检测的影响因素

气相色谱法测定室内空气中总挥发性有机物TVOC的影响因素很多,从采样过程、解吸过程、色谱分析过程,对影响TVOC浓度检测的因素加以严格控制,保证检测结果的准确性.     

气相色谱法测定室内空气中TVOC的影响因素

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至少通风24 h;在气相色谱仪、热解吸仪最佳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.     

浅谈影响储罐有机废气大小呼吸的因素及减缓措施

简介溶剂储罐有机废气无组织排放的污染问题、影响有机废气无组织排放的因素及减缓措施。     

基于CO2和TVOC浓度的空调新风随机控制系统

为了在满足室内空气品质的要求下,尽可能地减少新风量实现节能的目的,以CO2浓度和TVOC浓度作为控制指标,实现空调新风的随机控制.介绍了该控制系统的原理.实验证明了该系统的稳定性.     

Measurements of formaldehyde and TVOC emission from paints and coating materials using small chamber method for building composites

An optimal test method for paint is proposed; additionally, the Field and Laboratory Emission Cell (FLEC) method used in Europe is applied as a substitute for the 20 L small chamber method. The emission factors of total volatile organic compounds (TVOC) and formaldehyde from oil-based paint, emulsion paint, and water-dispersion paint with a coating weight of 300 g/m2, cured for 24/48 hours, were measured using the 20 L small chamber method. The emission rate of TVOC and formaldehyde from all paints began to stabilize after approximately 7 days after 24/48 hours of curing even though Korean standards stipulate that paint should be measured and analyzed after the third day of application. The emission factor of TVOC and formaldehyde from oil-based, emulsion, and water-dispersion paints were also measured using the FLEC method. There was good correlation between the 20 L small chamber method and the FLEC method for oil-based, emulsion, and water-dispersion paint emissions. With the FLEC method, using paints prepared under identical conditions, the emission rate was stable 24 hours after installation of samples because the air flow rate of FLEC is much higher than that of a 20 L small chamber, and the relative cell volume of FLEC is much smaller than that of a 20 L small chamber.     

新装修房屋室内空气质量预测方法

分析装修过程中使用较广泛的材料表面的污染物释放量与各个影响因素之间的关系,测试单位时间内不同装饰装修材料表面总挥发性有机物释放量。在此基础上拟合装饰装修材料表面的甲醛及有机物释放量公式,计算各类材料的污染因子,从而能够从定量的角度描述室内环境污染物情况,使得预测装饰装修后的住宅室内污染物浓度成为可能。     

室内空气中TVOC检测方法的问题与改进

目前国内普遍采用二种分析方法来检测室内空气中TVOC的浓度。本文针对在检测过程中常遇到的问题进行了研究，提出了改进意见。     

室内空气中TVOC检测方法的问题与改进

目前国内普遍采用二种分析方法来检测室内空气中TVOC的浓度。本文针对在检测过程中常遇到的问题进行了研究,提出了改进意见。     

室内环境检测中TVOC待测溶液测定的不确定度分析

对测定TVOC(总挥发性有机化合物)待测溶液浓度时造成的主要不确定度来源进行了分析概述及预评估。绘制标准工作曲线,对待测溶液进行重复性试验,进行试验数据的处理,探讨研究了合成待测溶液测定的标准不确定度。     

关于城市住宅的室内空气质量现状及有关规范

本文较扼要而全面地介绍了中国城市住宅的室内空气质量情况(包括所作的实测调研)，同时也和日本的一些情况作了对比。并提出生产合格建材的必要性和迫切性。