HPLC environmental settings: HPLC daily operating conditions: temperature: 10 ~ 30 ℃; relative humidity <80%; preferably constant temperature, constant humidity, away from high electromagnetic interference, high vibration equipment, and have good ventilation facilities. Pump maintenance: 1. Use mobile phase to clean as much as possible; 2. Sand core filter head at the liquid inlet should be cleaned frequently; 3. Prevent precipitation during mobile phase exchange; 4. Avoid blockage or air bubbles in the pump; 5. Every After the end of the analysis, the sample inlet should be rinsed repeatedly to prevent cross-contamination of the sample;
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