Special gas chromatograph for non methane total hydrocarbon benzene series analysis

Product Introduction

Shanghai Kechuang Chromatography Instrument Co., Ltd. has successfully developed a multifunctional dedicated gas chromatograph for environmental air monitoring.

Special gas chromatograph for non methane total hydrocarbon benzene series analysisInstrument Features

By using a dual tube constant volume injection valve for injection, it is possible to analyze and detect total hydrocarbons/non methane total hydrocarbons in the exhaust gas of pollution sources in one injection, with good repeatability, high accuracy, and a relative standard deviation of less than 3%;
Can be applied for adsorption sampling/thermal desorption analysis of trace non methane total hydrocarbons in ambient air;
The application of secondary thermal desorption technology can quickly and accurately analyze benzene derivatives or (TVOC) in ambient air. Compared with the carbon disulfide extraction method using activated carbon tubes, it has the advantages of no laboratory pollution, good repeatability (RSD ≤ 3%), high recovery rate (over 95%), 100-1000 times higher sensitivity of the method detector, and faster analysis time.
Full microcomputer control system, computer reverse control (one computer can control N (N ≤ 253) chromatographs, with six temperature control systems; Four channel time program system.
The chromatograph adopts a 10/100M Ethernet communication interface, which can be used for remote control, remote data transmission, processing, and supervision of the instrument. Can be connected to unit supervisors and above, facilitating supervision by supervisors.
Digital signal output (built-in chromatography workstation) with direct output via Ethernet cable.
Large capacity column box with automatic rear door, capable of 8-level programmed heating and near room temperature control function (8 ℃ above room temperature).
Equipped with fault self diagnosis function, displaying the location and nature of the fault at any time;
Equipped with over temperature protection function, any temperature control exceeding the set temperature will automatically stop heating.

Special gas chromatograph for non methane total hydrocarbon benzene series analysistechnical performance
gas chromatograph
Hydrogen flame detector FID:
FID detection limit: DF ≤ 5 × 10-12g/s (nC16);
Baseline drift ≤ 5 × 10-13A (30min);
Baseline noise ≤ 1 × 10-13A;
Linear range: 107;
Stability time ≤ 1h
Temperature control:
Temperature range: 8 ℃ -400 ℃ above room temperature
Temperature control accuracy: ± 0.5%
Program order: 8 orders
Cheng Sheng rate: 0-39 ℃/min (adjustable increment of 0.1 ℃/min)
Program heating repeatability ≤ 1%
Secondary thermal desorption apparatus
1. Temperature control
① Primary pyrolysis furnace: 80 ℃～ 350 ℃± 1 ℃ ② Secondary pyrolysis furnace: 80 ℃～ 350 ℃± 1 ℃
③ Switching valve: 80 ℃～ 180 ℃± 1 ℃ ④ Refrigerator: -10 ℃～+10 ℃± 1 ℃
⑤ Output pipeline: ≥ 200 ℃~250 ℃
2. Carrier gas control
① Carrier gas 1: Analyze the carrier gas path. When using a large-diameter capillary column, the flow rate adjustment range is 3-10ml/min. When using a packed column, it can reach 60ml/min;
② Carrier gas 2: It is a carrier gas path for thermal desorption and refrigeration concentration adsorption, with a flow regulation range of 50-100ml/min.

Analysis of total hydrocarbons, non methane total hydrocarbons, and benzene derivatives in ambient air using a dedicated gas chromatograph Analysis of total hydrocarbons, non methane total hydrocarbons, and benzene derivatives in ambient air using a dedicated gas chromatograph Analysis of total hydrocarbons, non methane total hydrocarbons, and benzene derivatives in ambient air using a dedicated gas chromatograph