Method for detecting TVOC in indoor air
A technology for internal air and detection chambers, applied in measuring devices, instruments, scientific instruments, etc., can solve secondary pollution and other problems, achieve good adsorption effect, and accurately measure TVOC concentration
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[0032] Examples:
[0033] 1. The main instruments, equipment and reagents used in the present invention are as follows: 1. GC-2010plus gas chromatograph with FID; 2. BTJ-Ⅲ thermal desorption instrument; 3. VOCs standard solution in methanol: 1000 μg / mL; 4 , 1μl syringe; 5. Tenax-TA adsorption tube; 6. High purity nitrogen purity greater than 99.999%; 7. SGK-5LB low noise air pump; 8. TH-500 hydrogen generator, hydrogen purity greater than 99.999%; 9. Air Resistance test device (-25~0)kpa; 10. The microwave analysis device is the above-mentioned microwave analysis device, including a radiation leakage prevention box, a microwave radiation device, a Tenax-TA tube support frame, an insulation sleeve, a six-way valve, and a flow meter And control panel.
[0034] 2. The analysis steps of the present invention are as follows:
[0035] 1. Pre-treatment of Tenax-TA adsorption tube
[0036] ①Pre-treatment for thermal analysis: Open the sealing ring at both ends of the adsorption tube and hea...
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