UPLC/MS (LC/MS-Triple quad)
If the HPLC is the master specialist in identifying and quantifying, then the LC-MS/MS is the all-star. It is able to do everything the HPLC can do, only better and more precisely. It does this by using a very high-pressure micropump—15,000 psi—,combined with dual detector / photodiode array (PDA) and a more powerful mass spectrometer detector. It is used in cases where extreme sensitivity is needed.
Currently, this is the most advanced and widest-application tool for analysis. It allows for the most precise measurements—in parts per trillion rather than billion or million… The LC-MS/MS is able to effectively analyse herbs and medicinal components.
The LC/MS combines the advanced separation capabilities of an HPLC with the powerful analytical abilities of a mass spectrometer.
A sample is injected into the UPLC system and separated into its various components. These components enter the MS through an “electro spray interface,” where very rapid ionization takes place. At this point, the mass spectra of the components can be used to pinpoint-analyse the sample.
The main advantage of this system is that it generates fast, accurate, and extremely precise measurements by creating an electronic signature of a compound.