FAQ - Frequently Asked Questions

• What are the measure­ment principles of MS?

• Why are there decimal points in MS data?

• With regard to resolution; What does R > 2M mean? Specifically, just how good is R > 2M?

• What is S/N?

• Please explain the principles, advantages, and disadvantages of EI, CI, and NCI easily.

• Please explain the principles, advantages, and disadvantages of EI

• Please explain the principles, advantages, and disadvantages of CI

• Please explain the principles, advantages, and disadvantages of NCI

• What are the QPMS advantages compared to the magnetic field type?

• NCI: Why is the ion source changed between NCI and PCI?

• NCI: When analysis is done without switching the NCI and EI ion source, don't some results deteriorate compared to normal EI?

• Sensitivity: Please provide data comparing the sensitivity of TIC to the sensitivities of other GC detectors (FID, FPD, ECD).

• What are the selection guidelines for reaction gases used with CI and NCI?