Solid liquid integrated blowing and capturing instrumentIt is an analytical pre-processing device that integrates automation, high sensitivity, and multi scenario adaptability, widely used in environmental monitoring, food safety, industrial safety, and scientific research fields. The core principle is based on dynamic headspace technology, which uses high-speed airflow (such as helium or nitrogen) to blow the sample (solid or liquid), causing volatile organic compounds (VOCs) to detach from the matrix and accumulate in the capture tube. Then, after high-temperature analysis, they are directly separated and detected by gas chromatography (GC) or gas chromatography-mass spectrometry (GC/MS). This process achieves efficient enrichment and precise analysis of trace VOCs.

　　Solid liquid integrated blowing and capturing instrumentPeriodic maintenance methods:

1. Monthly/after 100 uses

Replace consumables:

Consumable parts such as capture tubes, filter cotton, and sealing gaskets need to be replaced regularly (such as replacing the capture tube after capturing 50 samples).

Check and clean the air path filter to prevent particle blockage.

Calibration parameters:

Use standard samples (such as VOCs standard gas of known concentration) to verify the accuracy of the instrument and calibrate the quantitative curve.

Check the accuracy of the flow controller and compare and correct it with a standard flow meter if necessary.

2. Before quarterly/long-term discontinuation

Deep cleaning:

Disassemble the pipeline, treat the metal parts with an ultrasonic cleaner, air dry and reassemble.

Perform high-temperature activation regeneration on the capture tube (operate in an anaerobic environment to avoid combustion).

Functional testing:

Run a no-load test to check the smoothness of the air circuit and the stability of temperature control (such as whether the heating module can reach the set temperature within ± 5 ℃).

The blank value of the verification system (i.e. the response value when there is no sample) should be below the detection limit (e.g.<0.1 ng/L).

3. Annual maintenance

Professional maintenance:

Contact the manufacturer or authorized service provider for a comprehensive inspection, with a focus on checking the lifespan of sensors (such as pressure and temperature probes) and solenoid valves.

Replace aging wires, seals, and lubricate transmission components (such as peristaltic pumps and robotic arms).

Software update:

Upgrade control program, fix potential vulnerabilities, optimize collection parameter settings.