Three stage cold trap atmospheric pre concentrator

Ontech870Three stage cold trap atmospheric pre concentratorIt is an ultra-low concentration VOCs atmospheric pre concentrator. Adopting liquid nitrogen deep freezing and core cold trap technology, its concentration ratio is greater than 1000:1, which can be matched with any style of GC or GC-MS, and can continuously monitor volatile organic compounds in the ambient air online, fully meeting the requirements of national standards HJ759-2015, EPATO-14, and TO-15 methods. The unique hardware and software design enables it to process various gas samples more effectively.

Ontech 870 adopts the current 3-level cold trap technology, with a freezing temperature of up to -190 ℃. One stage of the cold trap is highly efficient in removing water; Secondary cold trap adsorbent combination, efficient enrichment, flash evaporation analysis; The three-stage focusing trap is deeply frozen, and then rapidly vaporized into GC at a heating rate greater than 2000 ℃/min, in conjunction with the invention of analytical technology. The equipment has an advanced temperature control system, with a temperature control accuracy of ± 2 ℃, making analysis more stable and accurate, and peak separation. The innovatively designed host integrates a 16 bit automatic sampler, eliminating the cost of configuring an automatic sampler and improving work efficiency in one stop.

Hardware features:

Unique three-stage cold trap technology, first stage water removal trap, second stage enrichment trap, and third stage cryogenic focusing trap;

High speed gasification with a heating rate of 2000 ° C/minute, combined with the invention of analytical technology, enables the separation of compounds while narrowing and increasing peak shapes;

Standard configuration includes independent standard gas and internal standard injection ports, as well as 14 injection ports (customizable). An external automatic sampler can also be added, increasing the number of gas paths to 29. It can be connected to a Suma tank or gas bag to achieve automatic injection of batch samples;

◎ Structural innovation, which can save 20% of liquid nitrogen (unique innovation)

Reliable structural design: The sample pipeline is fully inert treated, and the entire process from the sample joint to the internal solenoid valve body is heated at high temperature, truly achieving full sample tracing without cold spots or adsorption (sample port joint tracing);

The concentration ratio is greater than 1000:1;

Efficient water removal trap, which retains polar compounds dissolved in water while removing water from the sample. Therefore, it can concentrate 57 types of PAMS standards and 65 types of TO-15 standards, solving the problem of using a permeable membrane for water removal, which can only concentrate 57 types of PAMS standards and cannot concentrate TO-15 standards;

Stable RJ45 interface connection, friendly all Chinese software interface.

Software features:

The control software is easy to operate and has powerful functions, especially for users who lack pre concentration experience, it is easy to use;

High precision MFC electronic metering, mature and reliable technology, unique algorithm design, can completely avoid the startup of ordinary MFC

◎ Solved the problem of inaccurate flow, eliminating the need for a vacuum tank, making it convenient and flexible to use.

◎ The method editing function is powerful and flexible, and the running time process can be fully customized to meet different sample and analysis needs;

◎ Complete data recording and export functions, supporting various notes;

◎ Can be paired with any style of GC or GC-MS

Pre set HJ759-2015, TO-14, TO-15, PAMS, and organic sulfide methods;

Define or modify methods without changing hardware, making it possible for customers to optimize and develop more methods;

Intuitive graphical display of gas path: valve status, cold trap temperature, gas flow rate, and gas flow direction;

Powerful sequence control and comprehensive QA/QC reports;

◎ Fully supports 32 or 64 bit systems with Windows XP and above versions.

Finished product characteristics:

hardware

Switch on/off Power Design;

software

Visual Gas Path graphical display: valve status, cold trap temperature, gas flow rate, gas flow direction

Advanced temperature control system

• Comprehensive QA/QC reports

• Short sample running cycle;

• Full support for Windows system;

One click execution of many common functions: reset, run, system purge, cold trap cleaning, high-temperature flushing of sample pipelines.

Supports both positive and negative pressure leak detection methods, and automatically generates leak detection reports.

Ontech870Three stage cold trap atmospheric pre concentratorSpecifications:

Third stage cold trap;

Primary water trap: -190 ° C~300 ° C;

Secondary enrichment trap: -190 ° C~300 °;

◎ Three stage cold focusing trap: -190 ° C~300 ° C; heating rate>2000 ° C/minute. Sensitivity and concentration range

Concentration ratio:>1000:1;

◎ Detection limit: 0.1ppbv

Reproducibility RSD: ≤ 3% (for over 90% of compounds).

Sample processing capability:

All pipelines are made of siliconized stainless steel material

◎ Injection range: 4-2000ml (0-100% relative humidity), support quantitative ring injection below 4ml;

◎ MFC flow range: 5-200ml/min, accuracy ± 2% (standard configuration);

Temperature control accuracy ± 2 ℃, maximum heating rate 360 ℃/min (third level greater than 2000 ℃/min)

injection port

◎ Independent internal standard and standard gas injection ports, equipped with 13 additional injection ports

◎ Optional automatic sampler (16 injection ports).

Three step water removal:

When transferring the sample from cold trap 1 to cold trap 2, control the temperature of cold trap 1 and the flow rate of the transfer airflow to retain some water in cold trap 1;

Select suitable adsorbent materials for Cold Trap 2 and control its temperature to avoid adsorption of water and CO2;

◎ Focusing device heating injection control

a. Preheat N2 in the heating box

b. Hot N2 passes through the outside of the focusing tube for rapid heating (over 2000 ℃/min)

c. Part of the water is retained in the focusing device and can be selectively reheated to remove the retained water after GC analysis is completed.