GB50325-2020 "Standard for Indoor Environmental Pollution Control of Civil Building Engineering"

2026-04-10

1. Experimental instruments: TDS-24RD automatic secondary thermal analysis instrument (Taitong Technology (Guangzhou) Co., Ltd.), ATHH-12 activator (Taitong Technology (Guangzhou) Co., Ltd.), gas chromatograph, hydrogen flame ionization detector, column: TVOC special column 50m*0.32mm*1.4um
2. Method conditions:
Thermal desorption conditions dry blowing 300s, adsorption tube desorption temperature: 320 °C, desorption time: 500s, focused cold trap temperature: -15 °C, focused cold trap desorption temperature: 320 °C, cold trap desorption time: 60s, transmission line temperature: 180 °C, valve box temperature: 150 °C, injection 240s
Gas chromatograph conditions Inlet temperature: 220°C, detector temperature: 250°C, column flow: 1.2ml/min, split ratio: 10:1, column temperature conditions: initial temperature: 50°C, hold 10min, 5°C/min rise to 250°C, hold 2min3.Sample preparation:
adsorbent tube 2,6-p-phenyldiphenyl ether porous polymer-graphite carbon black-X composite adsorption tube, Through the three-stage procedure of the ATHH-12 activator, the temperature is completely activated and sealed for backup.
Preparation of calibration adsorption tube series The fully aged adsorption tube was placed on the standard sample loading platform of the ATHH-12 activator, and the quantitative mixed standard solution was injected in turn, and the standard adsorption tube with 100.5ug, 0.05ug, 0.1ug, 0.4ug, 0.8ug and 1.2ug was prepared with each component content of 2.0ug, <>.<>ug, <>.<>ug, <>.<>ug, <>.<>ug and <>.<>ug.

Results of liquid injection analysis of 16 components

After the analysis of 16 components, the results of injection analysis were 16 components, and the results were reproducible for 5 consecutive injections