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Perfect analysis of 16 kinds of TVOC in the new national standard (GB 50325-2020) - the solution of Deyan automatic thermal desorption instrument

2020-07-08 13:36:37 Practical thermal analysis one thousand two hundred and twenty-one

In order to meet the "GB 50325-2020 standard for indoor environmental pollution control of civil building engineering", steadfast Deyan provides the following solutions, which fully meet the requirements of 16 kinds of TVOC injection detection.

national standard GB 50325-2020 (standard for indoor environmental pollution control of civil construction engineering) will be implemented on August 1, 2020, and the original GB 50325-2010 will be abolished.
For the control and monitoring of total volatile organic compounds (TVOC), the following amendments have been made:
1. The type of TVOC is increased from 9 components in 2010 edition to 16 components
2. The T-C composite adsorption tube sampling method for BTEX and TVOC was added
3. The concentration limit of pollutants in indoor air should be tightened
More strict control on the decoration of the school dormitory and so on
5. Adjust the setting of indoor pollutant concentration detection points.
Test material: 16 kinds of TVOC

GB 50325-2020 Standard method instrument configuration:

Pretreatment equipment: Methods autotds was recommended -VPro automatic thermal analyzer
Aging of sampling tube: Bth-24 position desorption tube activator

Analytical instrument: gas chromatography FID detector

Instrument conditions

Thermal analyzer condition

Analysis temperature: 300 ℃

Purging time: 5 min

Pipeline temperature: 180 ℃

Secondary temperature: 300 ℃

Desorption time: 10 s

Injection time: 4 min

Back blowing time: 20 min

Cold trap: - 30 ℃

Purge flow: 50 ml / min

Back blowing flow: 100 ml / min

GC condition parameters:

 Thermal desorption instrument


The results were as follows

1、 16 kinds of TVOC chromatograms

 Thermal desorption instrument

2、 Linearity of each substance

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument


 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

 Thermal desorption instrument

According to the new standard GB 50325-2020, Tashi de has developed heating analyzer and aging activator equipment, and can also provide TVOC thermal desorption tube, 16 component TVOC mixed standard, 6 kinds of benzene series mixed standard and other consumables used in GB 50325-2020


Automatic thermal analyzer (GB 50325-2020)

 Solid thermal desorption


Analysis tube aging activator (GB 50325-2020)

 Solid thermal desorption