This article describes the MRMHR workflow for a TripleTOF® LC-MS/MS System using the Method Wizard in Analyst® TF or SCIEX OS Software. MRMHR is not a scan type. It is a description for a set of looped experiments, which can be used for a targeted approach. The looped experiments include a TOF-MS experiment followed by dedicated product ion experiments either in high-resolution or high-sensitivity mode.
The source on the X500R QTOF System can be used in atmospheric-pressure chemical ionization (APCI) mode, but a different probe with a twin electrode must be installed. In addition, a different APCI tuning solution must be used and is available for purchase from SCIEX.
This is a set of instructions for changing the number of decimals displayed in Analyst® software quantitation metric plots and calibration curves. The default number of decimals leaves the significance so low that you can not reproduce the results shown in the results table. A warning is given to let customers know that Regedit is a dangerous utility.
To set up a MRM transitions where the Q1 mass for one compound is identical to a second compound in Analyst® software, change the Q1 mass of the second compound by 0.1 -0.05 Da. After making this adjustment, the software will accept the duplicate mass for Q1.