The Suma tank sampling and analysis system adopts negative pressure sampling technology and inert materials, effectively avoiding the entry of external impurities and the adsorption and contamination of samples by the equipment itself, ensuring the purity of the collected samples and providing reliable guarantees for accurate analysis in the future. It is less affected by environmental factors and can maintain high sampling accuracy in both complex outdoor environments and different climatic conditions. It can perform timed and fixed-point sampling, as well as control analysis in multiple laboratories, and can adjust the sampling speed as needed, suitable for sampling needs in various scenarios.

After gas sample collection, it can be stored stably in a Suma tank, especially after silane treatment, which can keep the sample for several months, making it convenient for transportation and long-term research use. Mainly used for the collection of organic gas samples, it overcomes the shortcomings of general VOCs sampling and analysis methods such as adsorption desorption and thermal desorption, which have poor sensitivity, long sampling time, and poor universality. It is currently one of the better methods in air sampling. Being able to maintain atmospheric conditions consistent with the sampling points, achieving in-situ sampling, and making the analysis results more accurately reflect the actual conditions of the sampling site.

The measurement steps of the Suma jar sampling and analysis system are as follows:

1. Tank preparation

-Cleaning and drying: Before use, it is necessary to ensure that the interior of the Suma jar is clean, dry, and free of impurities. This is to ensure the accuracy of subsequent sampling and avoid contamination of the sample by residual substances.

-Vacuum treatment: evacuate the cleaned Suma tank to a vacuum state so that gas can be smoothly drawn in during sampling.

2. Install filters: Install suitable filters at sampling points to remove particulate matter and other interfering substances from the air, preventing them from entering the tank and affecting the analysis results.

3. Sample collection

-Instantaneous sampling: Take the processed sampling tank to the sampling location, connect the filter, open the valve, and use the vacuum environment inside the tank to quickly suck the air sample into the tank in a short period of time. This method is suitable for situations where it is necessary to quickly obtain the gas composition at a certain moment.

-Constant flow sampling: Long term continuous sampling according to specific flow requirements can reflect the gas conditions in the area.

4. Standard gas verification: Use a dynamic diluter or manually prepare a certain concentration of standard gas, and analyze it through atmospheric pre concentration GCMS. If the measured concentration is greater than or equal to 80% of the concentration of the prepared standard gas, further verification can be carried out; If it is less than 80, the Suma tank should be removed.

5. Instrument analysis: Send the collected samples to corresponding analytical instruments, such as gas chromatographs, mass spectrometers, etc., for component analysis and quantitative detection. For example, using Suma jar sampling multiple capillary column capture gas chromatography-mass spectrometry to determine specific substances in ambient air.