GB 50325-2020 Application of "Indoor Environmental Pollution Control Standards for Civil Building Engineering"

2023-04-10

GB50325-2020 Application
《Indoor Environmental Pollution Control Standard for Civil Construction Engineering》

Experimental instruments

TDS-24RD Automatic Secondary Thermal Desorption Instrument, ATHH-12 Activator Instrument, Gas Chromatography Instrument, Hydrogen Flame Ionization Detector,
Column: TVOC Special Column 50m*0.32mm*1.4um

Method conditions: gas chromatograph conditions: injection port temperature: 220 °C, detector temperature: 250 °C, column flow: 1.2ml/min, split ratio: 10:1,

column temperature conditions
: 50 °C (10min), 5 °C/min to 250 °C (2min).
Thermal desorption instrument conditions: purge 300 °C (600s), flow rate 80ml, cold trap temperature -15 °C, secondary resolution 320 °C (60s); Piping and valve box 180°C.

Sample preparation
adsorption tube: 2,6-p-phenyldiphenyl ether porous polymer-graphite carbon black-X composite adsorption tube, used after complete activation by ATHH-12 activator.
Preparation of calibration adsorption tube series The fully aged adsorption tube was placed on the standard loading platform of the ATHH-12 activator, and the quantitative mixed standard solution was injected in turn, and the standard adsorption tube with 100ml/min nitrogen was purged for 5min to prepare
a standard adsorption tube with a component content of 0 .05ug, 0 .1ug, 0 .4ug, 0 .8ug, 1.2ug and
2.0ug.