Indoor environment detection gas chromatograph

Indoor environment detection gas chromatographcharacteristic

1. Built in self-cleaning desorption instrument
2. Networked workstations
3. Blank deduction function
4. Reference peak function?

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Meaning and methodology

The continuous increase in industrial production emissions has led to increasing pollution of the living environment. Environmental pollution control and indoor air quality have also attracted more and more attention from people and the country. In order to control and monitor the indoor air quality of construction projects, the country has formulatedGB50325-2010The "Code for Indoor Environmental Pollution Control of Civil Building Engineering" is used to require relevant indoor environmental quality, in order to improve indoor air quality and reduce health threats to people working and living indoors. The standard stipulates the use of gas chromatography to determine benzene andTVOCThe content.TVOCIt refers to the boiling point in air measured under normal pressure conditions being lower than or equal to250℃The total amount of volatile organic compounds.

Main operating procedures:Indoor environment detection gas chromatographUsing an atmospheric sampling instrument at the location to be tested500ml/minThe traffic passes throughTenaxTube (activated carbon tube for benzene) sampling20Minutes, collect10LAir, this process is called adsorption. Then take thisTenaxThe process of placing the tube into the desorption instrument is called desorption. The desorbed sample is carried into the chromatographic column by the carrier gas, separated by the chromatographic column, and then enters the detector. The data is collected and managed through the chromatographic workstation.

Meet the standards:

GB50325-2010Code for Indoor Environmental Pollution Control of Civil Building Engineering

System flowchart:

Instrument configuration:

(1) Indoor air TVOC and this determination gas chromatograph GC-6600

(2) Networked control workstation

(3) Capillary Column (SE-30)

(4) Filled column (PEG-6M)

(5) Tanex adsorption tube

(6) Activated carbon adsorption tube

(7) TVOC and benzene standard samples (1-4 standard samples)

(8) Dual channel atmospheric sampler

Sample spectrum

Introduction to the New Networked GC-6600 Gas Chromatography System

New networked gas chromatographGC-6600It is a newly launched networked gas chromatograph by Shanghai Fanwei Instrument Equipment Co., Ltd. The instrument adopts an Ethernet communication interface with * to directly connect the computer and the Internet, equipped with a single independent connection process, which facilitates real-time monitoring, operation, and data analysis monitoring of the instrument by multiple departments. Equipped with software, easy to operate. Adopting a large screen true color LCD display and plastic mold buttons, the display is intuitive and the operation is convenient. The full air flow display function can better enable operators to intuitively and conveniently grasp the operation of the instrument's air flow, and can adopt a fullEPCThe air flow control system is used to regulate the air flow rate. The design is practical and beautiful, using computer network control technology, and is a new modern gas chromatograph that conforms to informatization and networking.

1、 Main technical features:

1 Networking technology makes operation and monitoring more convenient:

★10/100M adaptive Ethernet communication interface with technology * and built-in IP protocol stack enable the instrument to easily realize long-distance data transmission through the enterprise's internal LAN and Internet; Convenient laboratory setup, simplified laboratory configuration, and data management;

★ Three independent connection processes are designed inside the instrument, which can be connected to local processing, unit supervisors (such as chief engineer, technical factory director, etc.), and higher-level supervisors (such as environmental protection bureau, technical supervision bureau, etc.), making it convenient for unit supervisors and higher-level supervisors to monitor the operation of the instrument in real time and analyze data results;

The NETChromTM workstation equipped with the instrument can support multiple chromatographs (253 units) working simultaneously, achieving data processing and reverse control, reaching the industry's highest level;

★ NETChrom^TMBuilt in workstationModbus/TCPServer, which can easily access the analysis resultsDCS(Distributed Control System);

2 Innovative and practical structural design:

The instrument adopts vacuum fluorescence display technology, atmosphericThe interface operation is more scientific and reasonable; Having two operating systems in Chinese and English to meet different user needs;

★Abandoning the fragile and low-end PVC leather buttons, plastic mold buttons are used, which have a good hand feel and are durable

The instrument adopts a modular structural design, which is clear in design, easy to replace and upgrade, and provides protectionThe effectiveness of investment;It can meet the analysis of complex samples and can be equipped with various high-performance detectors, such as PDHIP, FID, TCD, ECD, FPD, and NPD;

★*Abandoning traditional mechanical valves and pointer pressure gauges, digital flow display is adopted.

★The ability to load EPC technology for gas path control has significantly improved its automation level and overall performance. It has achieved automatic protection for gas path faults, automatic ignition, automatic key shutdown, and automatic execution of gas path opening, achieving one key start;

★ The instrument is designed with a timed self starting program, which can easily complete gasAutomatic online analysis of liquid samples(Sample injection components are required);

★Design the interface for the automatic sampler system to facilitate its connection and future upgrades;

2、 Main technical indicators:

1Temperature control parameters:

• Temperature controlled area: 8 channels
• Temperature control range: 4 ℃ to 450 ℃ above room temperature, increment: 1 ℃, accuracy: ± 0.01 ℃
• Program heating order: 8th or 16th order
• Cheng Sheng rate: 0.1-39 ℃/min (ordinary type); 0.1-80 ℃/min (high-speed type)

2Event and gas path parameters:

• External events: 4 channels; 4 auxiliary control outputs
• Sample injector type: Automatic six way valve thermal analysis injection
• Number of detectors: FID
• Gas path control: mechanical valve control mode, EPC mode optional
• Start injection: automatic

3、Hydrogen flame ionization detector (FID)

• Detection limit: Mt ≤ 3 × 10-12g/s (n-hexadecane-isooctane solution);
• Noise: ≤ 5 × 10-14A
• Drift: ≤ 1 × 10-13A/30min
• Linear range: ≥ 106
• It has automatic ignition function upon startup and automatic ignition upon shutdown to prevent hydrogen leakage after accidental shutdown.

5Other parameters:

• Dimensions: Width 572mm, Height 465mm, Depth 552mm
• Weight:~50kg
• Power supply: 220V ± 22V, 50Hz Power: ≥ 2kW
• Ethernet: IEEE802.3

3、 Networked NETChromTM Workstation:

1Workstation features:

1. A networked workstation that enables remote control of multiple chromatography instruments, allowing you to control them from your deskGC-6600gas chromatograph
2. Four channel acquisition function, not limited to acquisition with only two detectors;
3. Real time display of eight temperature control channels, allowing for the setting of temperature parameters and protection values for various parts at any time;
4. Display the pressure and flow rate of each gas path, real-time understanding of the pressure and flow rate of the injector, detector, sample gas, and total chromatographic gas;
5. Set the temperature rise program for the column box and display the real-time temperature rise status of the program;
6. Set up eight external events, which can be automatically completed at any time: valve injection, multi position valve selection, automatic valve cutting, liquid automatic sampler, and many other external controls;
7. Automatic collection of injection spectra;
8. The storage analysis program completes functions such as one click startup, automatic sampling, spectrum analysis, and sample data saving;

2Hardware performance:

1. communication interfaceEthernet IEEE802.3Connect the network cable directly;
2. high-precision:24High precision positioningA/D
3. Resolution:±1uv
4. Input level range:-5mvto+1v
5. Sampling frequency:20time/second
6. Dynamic range:10⁶
7. Integral sensitivity:1μv·sec
8. Linearity:<±0.1%.
9. Reproducibility:0.06%.

3Software performance:

（1）Main features:

We promise to provide more value for every step of the scientific data lifecycle, from data collection and analysis to interpretation and management.

1. Laboratory management function

Supervisors can manage chromatographic state machine data in real-time through the network, and a computer can be set up as a server to centrally store all data for data management to prevent the loss of raw data.

1. networked

The connection port is a LAN interface, eliminating the drawbacks of RS232 data interface being prone to crashes and short distance. The high-speed transmission of data through Ethernet cables can enable one computer to control up to 253 chromatography instruments.

1. Total reversal control

All parameters related to analysis can be set on the workstation to achieve * reverse control.

1. Intelligent Points

All integration events and standard curve files are saved in the method file, which only needs to be set once. Irregular peaks will also be fully automatically integrated, saving the trouble of manual integration and eliminating manual integration errors.

1. Easy to operate

The software interface adopts tab page display, and parameter operation and display are clear at a glance, making it convenient for users to operate.

1. The temperature control area can be named

The temperature control area can be named according to user habits to prevent confusion. At the same time, whether the temperature control zone is heated can also be set.

（2）Multi image comparison function:The relative deviation of retention time, peak height, peak area, and content can be directly obtained, making it easy to grasp the repeatability of data