Shifting the Linear Range in Electrospray Ionization by In-Source Collision-Induced Dissociation

Chem Pharm Bull (Tokyo). 2016;64(4):356-9. doi: 10.1248/cpb.c15-00741.


The goal of this study was to demonstrate the utility of in-source collision-induced dissociation for shifting the linear range in liquid chromatography-electrospray ionization-tandem mass spectrometry (LC/ESI-MS/MS). The linear ranges for uracil, deoxyuridine, and uridine were shifted from 0.3-300, 1-100, and 10-1000 ng/mL to 10-1000, 30-3000, and 100-10000 ng/mL, respectively, by changing the declustering potential controlling in-source collision-induced dissociation. This technique should be considered for control of linear range in simultaneous quantitative measurements of extremely different amounts of compounds, drugs, and metabolites using LC/ESI-MS/MS.

MeSH terms

  • Limit of Detection
  • Spectrometry, Mass, Electrospray Ionization / methods*