Analysis of TVOC in Indoor Air

Time:2022.11.16

Publisher:Admin

Number:1472

2022.11.16

Admin

1472

Abstract

On January 16, 2020, the Ministry of Housing and Urban-Rural Construction of the People's Republic of China and the State Administration of Market Supervision and Administration jointly issued the National Standard of the People's Republic of China GB 50325-2020 "Standard for Indoor Environmental Pollution Control in Civil Construction Engineering". The standard will be formally implemented on August 1, 2020, and the GB 50325-2010 Code for Indoor Pollution Control of Civil Building Engineering will be abolished. Compared with the old version of the standard, the detection requirements of toluene and xylene are added to indoor pollutants. The test methods of benzene series and TVOC were refined, and T-C composite adsorption tube was added for sampling and testing. In order to meet the needs of our customers, since the release of the standard, our company immediately carried out experiments and sorted out this program.

1. Configuration Scheme

2. Test conditions

3、Test results

3.1 Qualitative results of 16 TVOC

Fig. 1 Spectrum of 2.0 μg TVOC

3.2 Calibration curve

Each component standard gas or standard solution with a certain concentration is quantitatively injected into the adsorption tube to prepare the standard adsorption tube with the content of each component being 0.05 μg, 0.1 μg, 0.4 μg, 0.8 μg, 1.2 μg and 2 μg, and the hydrogen flame ionization detector is used for detection, the retention time is used for qualitative analysis, and the external standard method is used for quantitative analysis. The linear correlation coefficient of each component was greater than 0.999, which met the standard requirements.

GB 50325-2020民用建筑工程室内环境污染热解吸气相色谱法-PDF附件-英文版.docx