LCMS-2020 - Features
High-Performance Liquid Chromatograph Mass Spectrometer
UFTechnology – It all began here…
Three points yielding ultra high-speed, ultra high-sensitivity MS measurements
High-speed polarity switching between positive/negative ion modes
To detect both positive ions and negative ions, measurements are performed while switching alternately between positive and negative ionization modes. The LCMS-2020 achieves ultra-high-speed polarity switching by adopting a high-voltage power source loaded with groundbreaking technology. This fast switching occurs in only 15 msec – the industry’s fastest switching rate for a single quadrupole mass spectrometer to date.
Fast Scanning Speeds
In MS scanning, a range of mass-to-charge ratios are determined in successive 0.1 m/z steps. This is controlled by applying a rapidly changing voltage to the quadrupole (quadrupole rods). By adopting new technology developed by Shimadzu, high ion transmission is achieved without sacrificing sensitivity or resolution, even during high-speed scans up to 15,000 u/sec. Very narrow UFLC peaks can now be properly detected in scan mode acquisition.
Dual Ionization Source (DUIS)
Operating Principle and Structure of Dual Ion Source
DUIS simultaneously ionizes samples using two ionization methods - electrospray ionization (ESI), which is suitable for high polarity compounds, and atmospheric pressure chemical ionization (APCI), which is suitable for low-to-medium polarity compounds. Therefore, it is well-suited to ionizing a wide range of compounds, with polarity ranging from low to high. Since the DUIS-2020 does not switch or split sample between ESI and APCI, but runs a combination of each simultaneously, it can measure samples with high reliability and reproducibility without any loss of sampling points, even for analyses with narrow peaks obtained using an ultrafast liquid chromatograph.
DUIS enables ESI, APCI, Positive, or Negative Ionization All at the Same Time… Significantly Improves the Efficiency of Analyzing a Wide Variety of Compounds at the Same Time or Analyzing Unknown Compounds
The following is an example of analysis using the dual ion source. Good response can be obtained for riboflavin by applying a protonated molecule and using ESI, but it is detected only slightly using APCI. A good response can also be obtained for thiamin using ESI, but it cannot be detected using APCI. In contrast, for calciferol, the protonated molecule can be detected using APCI, but ionization by ESI is inadequate. In this case, using the dual ion source enables obtaining a well-balanced chromatogram for each compound of interest. In addition, the high-quality spectrum provided by DUIS is as good as the one obtained using either the ESI or APCI ion source separately. This ion source is ideal for confirming the molecular weights of synthesized compounds or for simultaneously analyzing a wide range of compounds with polarity ranging from low to high.