Used Laboratory Equipment / Analytical Instruments

Nanjing Aikon Scientific Instruments, leveraging Nanjing's beautiful environment and convenient transportation, provides comprehensive laboratory solutions for analytical testing users across various fields nationwide. As a partner of international brands such as Agilent, Waters, Thermo Fisher, Shimadzu, and AB Sciex, we are committed to offering high-quality analytical instruments including liquid chromatography, gas chromatography, LC-MS, and GC-MS. Moreover, we supply imported/domestic laboratory instruments, equipment, and related consumables and accessories to meet all your needs in scientific research experiments. Choose Nanjing Aikon Instruments to make your laboratory work more efficient, precise, and reliable.

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Mass Spectrometry Maintenance

Mass Spectrometry Vacuum Leak Detection and Tuning

Mass spectrometer tuning is essential for obtaining high-quality mass spectrometry data. Before conducting sample experiments, vacuum leak detection and tuning of the mass spectrometer must be performed. Tuning should be done after powering on/off, replacing filaments, and cleaning the ion source. If the instrument remains powered on continuously, tuning is generally required every two weeks.

If the air/water concentration does not meet the requirements of H2O &lt;20%, N2 &lt;10%, and N2/O2 ≠ 4:1, first consider whether the system has a leak, including the gas path system, sample inlet, column connections at both ends, and the vacuum chamber. Next, check the gas source to see if a gas cylinder has been replaced recently, which may have exposed the pipeline to air during the changeover. Increase the split ratio and purge for 10 minutes before retuning. If the air/water concentration still does not meet the requirements, check if the carrier gas filter has reached saturation. If the filter is functioning normally, the issue may be due to impure gas sources. In this case, replace the gas source with one of purity greater than 99.999%.

If you are looking for cost-effective laboratory analytical instruments, consider Nanjing Aikon Instruments' used equipment. Feel free to contact us at any time to make your experiments more economically efficient.