大气采样器采样流量对室内环境甲醛检测结果影响研究  

Study on the Influence of Air Sampler Sampling Flow Rate on Formaldehyde Detection Results in Indoor Environment

作　　者：陈希尧[1] 蔡泽仁 钟义林[1] 李学辉[1] Chen Xiyao;Cai Zeren;Zhong Yilin;Li Xuehui(Shanghai Institute of Measurement and Testing Technology,Shanghai 200233,China)

机构地区：[1]上海市计量测试技术研究院,上海200233

出　　处：《绿色科技》2023年第16期120-123,共4页Journal of Green Science and Technology

摘　　要：甲醛是造成装修后室内环境污染的元凶之一,且释放周期较长,一旦超标,则会使人们长期处于甲醛的危害当中,引起一系列的疾病。因此,检测室内环境中的甲醛成为装修后检验室内环境是否安全的一种重要手段。研究发现:在检测甲醛过程中,在相同温度、大气压和采样体积条件下,不同采样流量,所采集到的甲醛吸光光度值和甲醛浓度值不同。流量较低或者流量太高都会导致所测得的甲醛浓度偏低,以酚试剂分光光度法测甲醛为例,当选择采样流量为500 mL/min时,测得的甲醛浓度值最高,越接近房间内甲醛含量的真实情况,当选择采样流量较低时或者较高时都会引起甲醛与酚试剂反应不充分而发生逃逸的情况。Formaldehyde is widely used in interior decoration materials,which is one of the culprits of indoor environmental pollution after decoration.It will affect people's health.Because of its long release cycle in the air,once exceeded,it will make people in the harm of formaldehyde for a long time and cause a series of diseases.Therefore,the detection of formaldehyde in the indoor environment has become an important means to test whether the indoor environment is safe after renovation.Through the study of this paper,it is found that in the process of formaldehyde detection,under the conditions of the same temperature,atmospheric pressure and sampling volume,but the different sampling flow,the formaldehyde absorbance value and the formaldehyde concentration value collected are different.A low flow rate or a high flow rate will result in a low formaldehyde concentration.Taking the phenol reagent spectrophotometric method for formaldehyde measurement as an example,when the sampling flow rate is 500 mL/min,the formaldehyde concentration value is the highest,which is closer to the real situation of formaldehyde content in the room.When the sampling flow rate is low or high,it will cause insufficient reaction between formaldehyde and phenol reagent.

关 键 词：大气采样器 流量 室内环境 甲醛 

分 类 号：X51[环境科学与工程—环境工程]