For peak tailing issues in PGC chromatographs, common maintenance and adjustment measures include: 1. If the stationary phase is lost or samples are adsorbed at the inlet or chromatographic column, replace the new chromatographic column or perform high-temperature aging of the inlet. 2. Cut off the front 1/2 to 1 meter of the chromatographic column. 3. Check if there are voids in the chromatographic column or if the inlet sieve plate is partially blocked; reverse the column if necessary to confirm and resolve the problem. 4. Add a small amount of tetrahydrofuran (within 5%) to the mobile phase to improve peak shape (applicable in appropriate scenarios). If you encounter difficulties in handling these issues or need professional technical support, Jiangxi Bio can provide comprehensive solutions for you. Our company Jiangxi Bio mainly provides overall solutions for experimental instruments, consumables, spare parts and after-sales repair and maintenance, covering brands such as Thermofisher, Waters, Agilent, GE, Cytiva, Beckman, etc. We offer services like repair, cleaning and maintenance, and have related chromatographic instruments, accessories and consumables. In addition, our chromatographic application consulting service can help you effectively solve peak tailing and other related problems, ensuring the smooth progress of your experiments.