Robust bioanalysis over a large 1500 injection sample set

Using the SCIEX Triple Quad™ 7500 LC-MS/MS System — QTRAP^® Ready

Jack Steed¹, Ferran Sanchez², Jianru Stahl-Zeng³, Basile Khara⁴, Simon Wood^4
1SCIEX, UK; ²SCIEX, Spain; ³SCIEX, Germany; ⁴Cyprotex Discovery, UK

Introduction

Here, the robustness of the SCIEX Triple Quad 7500 LC-MS/MS System — QTRAP Ready was evaluated over 1500 injections of a plasma sample spiked with four relevant bioanalysis compounds (atenolol, metoprolol, nadolol and rosuvastatin). This number of injections relates to more than two days total analysis time and shows that the instrument can perform optimally even after this large number of injections. After this testing, no instrument cleaning was required before the next analysis could begin, showing that the system’s performance had not been impacted. 

Figure 1, below, plots area values of each of the analytes against injection number, with a successful outcome appearing flat across the injection number. For this analysis, internal standards have not been used, so the data shown represents uncorrected, raw areas for each analyte. This highlights the robustness of the system. 

More details on the sample preparation and methods can be found in the Supplementary information.