1. Anti-cross contamination: Independent guide columns prevent sample cross-contamination.
2. Anti-fogging vacuum chamber design, high transparency: The chamber is made of organic glass, highly transparent, and glass products are not prone to breakage. The vacuum negative pressure environment, in combination with the vacuum negative pressure environment, resists fogging and is easy to observe.
3. Efficient recovery and enrichment: Multiple channels can be independently controlled with consistent extraction speeds, convenient control and adjustment. The vacuum regulation component can adjust the vacuum degree of the working chamber in real time, thereby regulating the extraction speed.
4. High selectivity: Specific adsorbents can selectively adsorb target compounds, reducing interference from impurities.
5. High enrichment efficiency: It can enrich target compounds from low-concentration samples, improving detection sensitivity.
6. High degree of automation: Automatically completes sample loading, adsorption, elution and collection, reducing human error.
7. Wide application range: Applicable to various liquid samples and compatible with multiple analytical methods.
8. Low maintenance cost: Durable components, easy to clean, reducing maintenance.

Equipment Inspection:
1. Appearance: Prior to utilization, inspect the exterior of the equipment to guarantee the absence of damage or leakage.
2. Connections: Examine whether all pipes, valves, and connectors are firmly attached and exhibit satisfactory sealing.

Adsorbent Selection:
1. Adsorbent: Choose the appropriate adsorbent in accordance with the properties of the target compound, such as diatomaceous earth, alumina, silica gel, C18, and others.
2. Pretreatment: Before application, adsorbents typically require pretreatment, including activation and equilibration, to ensure their performance.

Sample Preparation:
1. Sample Filtration: Ensure that the sample is clear and devoid of particulate matter. Filter when necessary.
2. Sample Volume: Control the sample volume in accordance with the capacity of the equipment and the adsorbent to prevent overloading.

Flow Rate Control:
1. Appropriate Flow Rate: Regulate the flow rate of the sample passing through the adsorption column. A flow rate ranging from 1 to 2 mL/min is generally recommended to avoid influencing the extraction outcome.
2. Uniform Flow Rate: Ensure a uniform flow rate to preclude pressure fluctuations.

Elution Conditions:
1. Eluent: Select the suitable eluent based on the polarity of the target compound to ensure effective elution.
2. Elution: Control the elution volume in accordance with the enrichment status of the target compound to avoid excessive elution.

Collection System:
1. Collection Vessels: Ensure the cleanliness of the collection vessels to evade cross-contamination.
2. Labeling: Clearly mark the sample information on the collection vessels for subsequent analysis.

Equipment Maintenance:
1. Regular Cleaning: Promptly clean the adsorption column and pipes after usage to prevent residue from affecting subsequent utilization.
2. Consumables: Periodically replace the adsorbent and sealing components to ensure the equipment's performance.
3. Calibration: Regularly calibrate the equipment to guarantee the accuracy of the flow rate and pressure.

Safe Operation:
1. Protective Gear: Wear protective eyewear, gloves, etc. during operation to avoid injury from chemical reagents.
2. Adequate Ventilation: Operate in a well-ventilated environment to prevent the accumulation of harmful gases.