TVOC analysis and detection gas chromatograph-Fornitore globale

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Shandong 1368 Tengfei East Road, Tengzhou Economic Development Zone

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TVOC analysis and detection gas chromatograph

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Product Introduction:

The toxic and harmful substances in indoor air will damage the indoor environment of civil construction projects and pollute human health. The "Control Specification" identifies radon, formaldehyde, ammonia benzene, volatile organic compounds (TVOC), and free toluene diisocyanate (TDI) as the primary pollutants.

Total volatile organic compounds (TVOC) refer to the total amount of volatile organic compounds with a boiling point lower than or equal to 250 ℃ measured in air under normal pressure conditions. (mainly xylene, etc.).

TengzhouHongxiang Analytical InstrumentThe indoor air pollutant detection (TVOC) analysis solution provided by the limited company is based on the requirements of the national air detection standard GB50325-2001 (2006 edition) and the Ministry of Construction's "Code for Indoor Environmental Pollution Control of Civil Building Engineering", using gas chromatography to quantitatively detect the content of TVOC and benzene.

Indoor Environment (TVOC) Analysisgas chromatographConfiguration plan:

1. Hongxiang GC-7900 gas chromatograph dual FID, packed column injection, capillary injection

2.chromatographic columnSE-30 50m*0.53mmdomestic

3.The thermal analyzer analyzes the temperature at 300 ℃, which is domestically produced

4.Oil free ZK-800 air generator

5.Hydrogen generator drying ZH-300

6 .Nitrogen 99.999%+steel cylinder+pressure reducing valve self provided

7.Domestic chromatography workstation

8.UStainless steel adsorption tube (filled with Tenax adsorbent)

9.UStainless steel adsorption tube (filled with activated carbon)

10.UStainless steel adsorption tube (empty tube)

11.Computer, printer to be provided by oneself

12. Domestic single air path atmospheric sampler

Desorption conditions:

Desorption temperature 250 ℃
Desorption time 5 minutes
Sweep air flow rate 50ml/min
Carrier gas nitrogen

Gas chromatograph analysis conditions:
Vaporization temperature 250 ℃
Detecting temperature of 250 ℃
The column chamber temperature is maintained at 50 ℃ for 10 minutes, and then raised to 250 ℃ at a rate of 5 ℃/min
Chromatographic column 50m × 0.53mm × 1.0um

Indoor Environment (TVOC) Analysis Gas Chromatography Analysis Process:
1) Sampling
2) Analysis
3) Gas chromatograph analysis
4) Chromatography workstation
5) Data output

GC-7900gas chromatographDetailed information:

One GC-7900 Performance Features:

1.The large screen displays both Chinese and English, with simple and clear screen switching, and a stylish and beautiful appearance.

2.Complete automation, intelligence, multifunctionality, multi-dimensional chromatography system (ARM9-32-bit chip and original foreign software), wide heating rate, fast cooling system, high stability temperature control technology, very good performance price ratio.

3.The comprehensive self diagnostic function enables users to conveniently check the location and type of faults.

4.Complete temperature overheating protection and platinum wire resistance on/off, short circuit alarm function to ensure that the temperature is not out of control.

5.Optional built-in AD conversion circuit can directly output digital signals, enabling all control and analysis tasks to be completed on a PC.

6.The column box can achieve negative temperature operation through dry ice or liquid nitrogen.

7.Within 180 ℃, the column box control accuracy is as high as ± 0.01 ℃.

8.Both packed columns and capillary columns can be installed simultaneously, and dual amplifiers can work simultaneously. Three detectors and a methane converter can be installed simultaneously.

9.Manual injection, automatic start of injection device, automatic ignition and other functions are optional, and ceramic or quartz nozzles are optional.

10.The instrument has an automatic power-off protection function when the gas is cut off.

11.Six way temperature control, seven step programmed temperature rise, independent temperature control for capillary and packed column vaporization chambers, intelligent dual rear door opening.

II GC-7900 Technical Specifications:

Column box temperature control range: room temperature 5 ℃ -400 ℃ (set in increments of 0.1 ℃).

Temperature accuracy: not greater than ± 0.1 ℃.

Temperature gradient: ± 1 ℃ (100 ℃ -360 ℃ programmed heating).

Heating rate: 0.1 ℃ -40 ℃/min (set in increments of 0.1 ℃).

Temperature control range for injection port and detector: room temperature+10 ℃ -400 ℃.

Voltage 220V± 10%, maximum power 2200W.

Dimensions: Length 570 x Width 480 x Height 500 (mm)

Column box dimensions: length 270 x width 248 x height 260 (mm)

Instrument weight: 46kg

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