Possible reasons for the sensitivity drop of PGC chromatograph detector include: 1. Detector or ion signal line issues such as poor contact or insulation degradation; 2. Detector contamination;3. Abnormal detector temperature;4. Chromatography column leakage or contamination;5. Carrier gas contamination;6. Outdated instrument configurations. Repair and calibration methods:1. Check the detector and ion signal lines for poor contact or insulation problems, and repair or replace them if necessary;2. Clean the contaminated detector using appropriate methods;3. Verify and adjust the detector temperature to the normal operating range;4. Inspect the chromatography column for leakage or contamination, and replace or regenerate it as needed;5. Ensure the purity of the carrier gas and replace it if contaminated;6. Update the instrument configurations to the latest settings. For professional and reliable solutions to these issues, our company Jiangxi Bio (匠析生物) provides comprehensive services including repair, maintenance, and calibration for PGC chromatographs and other lab instruments (covering brands like Agilent, Thermofisher, Waters, etc.). Our services include detector cleaning, signal line inspection and replacement, column maintenance, configuration updates, and application consulting, providing you with one-stop after-sales support to restore your instrument's performance efficiently.