“…Methodology to quantify drugs in biological fluids is important to support pre-clinical and clinical studies. Chromatographic methods have been reported for meropenem in plasma [10][11][12][13][14][15][16][17][18][19][20][21][22][23] and serum [24][25][26][27] using UV [12,16,26], diode array [15,20,28,29], and mass spectrometry [10, 11, 13, 14, 17-19, 21-25, 27, 30] detection. To the best of our knowledge, there are currently no analytical methods reporting the quantification of the combination of meropenem-vaborbactam in biological fluids and no methods for the quantification of newly developed β-lactamase inhibitor, vaborbactam.…”