Total visits: 101604，Daily visits 143； Instruments: 108.
Total visits: 101604，Daily visits 143； Instruments: 108.
The replacement of the gas chromatography septum needs to be determined according to the performance of the instrument itself and the number of samples to be tested.
The chromatographic column should be placed in a dry and dust-proof place daily. If the chromatographic column is contaminated, it needs to be re-aged according to the aging procedures of different chromatographic columns. Note: The detector cannot be connected during the aging process, otherwise the contaminants in the column will enter the detector during the aging process , thereby contaminating the detector.
