ONTECH880 Four stage cold trap preconcentrator

1. The unique separation capture technology of the four-stage cold trap can completely separate the water removal and VOC recovery, completely avoid the adsorption loss of high boiling point compounds in the water removal trap, and truly achieve the high boiling point nondestructive injection. Thanks to the characteristics of this technology, compared with traditional three-stage cold trap. the response of the high boiling point compounds increased by 170% (naphthalene)

2. After deep cooling and water removal in water removal trap, no need secondary heating, this brings incomparable water and impurity removal efficiency. Compared with the traditional three-stage cold trap, the capacity of water and impurity removal has increased by 46%.

3. The work process is simplified, the sample analysis cycle is saved, the analysis efficiency is increased by 20%, and the standard 400ml TO15 compound elution can be completed in less than 10 minutes. At the same time, it can also effectively save the refrigerant, the same liquid nitrogen, and more sample analysis volume.

4. Set up independent focusing cold trap to ensure the focusing effect of the compound, fully support the high pressure injection technology, make the peak shape more sharp, support shunt, no shunt, quantitative ring and other injection methods, comprehensively respond to a variety of high and low concentration samples, the adaptive concentration range from ppt to ppm level, truly achieve a common machine.

5. High speed gasification, the temperature increase rate reaches 2000 °C / minute, combined with the invention patent analysis technology, makes the compound perfectly separated and meanwhile the peak type becomes narrower and higher.

6. The innovative integrated built-in sample appliance has 13 injections (if do not choose built-in sampler, it has 3 injections); it can also be equipped with external automatic sampler, increased to 28 air routes, can connect to SUMMA canister or air bag to realize the automatic injection function of batch samples.

7. Reliable structure design: the sample line with fully inert treatment, from the sample joint to the internal solenoid valve body, the whole process with high temperature heating, sample heat companion in the whole process, no cold point, no adsorption.

8. Work process is simplified, and work efficiency is improved

9. The new generation of control software, simple operation, powerful function, especially for users lack of pre-concentrated use experience, easy to use;

10. High precision MFC electronic measurement, mature and reliable technology, unique algorithm design, can completely avoid the flow error problem when the ordinary MFC start , no need vacuum canister, convenient to use, flexible;

11. One-click function: reset, run, system purge, cold trap cleaning; after analysis, reverse flush  to each sample line at high temperature under the control of software. Automatic leakage detection before opening the canister valve, support two leakage detection methods of positive pressure and negative pressure, and automatically generate leakage detection report.

12. 12. Preset HJ 759-2023, TO-14, TO-15, PAMS, 117 VOCs methods; method editing function is powerful and flexible, running time process can be customized for different samples and analysis requirements;

13.Perfect data recording and export function, and support various remarks;

14. Can match any style of GC or GC-MS.

Hardware:

1. Switching mode power supply design;

2. Advanced temperature control system;

3. Highly integrated circuit board.

Software:

1. Intuitive gas path graphical display: valve state, cold trap temperature and gas flow rate, gas flow direction;

2. Comprehensive QA / QC report

3. Short sample running period

4. Fully support Windows system;

5. One-key execution of many common functions: reset, run, system purge, cold trap cleaning, high temperature flushing sample pipeline;

6. Support “positive pressure and negative pressure” two leakage detection methods, automatically generate leakage detection report.

Four stage cold trap

1. First-stage pretreatment trap: -190℃~ 300 ℃; the maximum heating rate is 360℃ / min;

2. Two-stage water removal trap: -190 ℃~ 300 ℃; the maximum heating rate is 360℃ / min;

3. Three-stage enrichment trap: -190℃~ 300℃; the maximum heating rate is 360℃ / min;

4. Four-stage deep cooling focus trap: -190 ℃~ 300 ℃; heating rate> 2000 ℃ / min.

Sample processing capacity

1. All pipelines are made of silanized stainless steel;

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

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

4. The temperature control accuracy is ± 2℃, and the maximum heating rate is 360℃ / min (deep cooling focus trap> 2000℃ / min).

Sensitivity and concentration range

1. concentration ratio:> 1000:1;

2. Lower detection limit: 0.1 ppbv;

3. Reproducibility RSD: 3% (90% + compounds).

Sample injection

1. Independent internal standard and standard gas inlet, equipped with 13 additional injection 

2. Optional automatic sampler (16 injections).

Working condition:

1. Working power supply: AC 220V± 10%, 50Hz;

2. Operating temperature: -10~50℃;

3. Relative humidity: 90%.

Ontech880 is a new four-stage cold trap atmospheric pre-concentrator on the basis of the traditional three-stage cold trap. Adopting the world's first four-stage concentration technology supplemented by deep freezing capture in liquid nitrogen, Breaking through the drawbacks of traditional three-level cold trap technology where high boiling point compounds are lost during condensation in the water removal trap, bring a stronger water removal effect and work efficiency, can match any style of GC or GC-MS to monitor volatile organic compounds in the ambient air, Fully in line with the national standard 《HJ759-2023 Ambient air—Determination of 65 volatile organic compounds—Collected in canisters and analyzed by gas chromatography/mass spectrometry》  《HJ1078-2019 Stationary source emission—Determination of 8 organosulfur compounds including methanethiol—Bag sampling and preconcentration/gas chromatography mass spectrometr》 and Testing requirements for polarity below carbon 12 (aldehydes, alcohols, esters, ketones, ether), nonpolar, sulfur compounds, nitrogen compounds in 《2019 VOCs monitoring program》 

Traditional three-stage cold trap concentration adopts low temperature physical water removal technology, in the process of water removal, it is inevitable to condense high boiling point compounds and water together in the water removal trap, and in order to achieve better water removal effect, the water removal trap cannot completely recover high boiling point compounds without discharging water. Therefore, The effect of water removal and the recovery of high boiling point compounds have become the biggest contradiction of three-stage cold trap technology.