“…Many analytical methods are reported by different workers for the determination of QTF in pure form, formulations and in biological materials. High-performance liquid chromatography (HPLC) [4][5][6][7][8][9][10][11][12], ultra-performance liquid chromatographic with tandem mass spectrometry (UPLC-MS) [13,14], HPLC with different detection systems such as chemiluminescence [15], electrospray ionization mass spectrometry (ESI-MS) [16][17][18][19] and tandem mass spectrometry [20][21][22][23][24], and gas chromatography [25,26] techniques have been used for the assay of QTF in body fluids. However, QTF has been determined in pharmaceuticals by titrimetric [27,28], potentiometric [29], polarographic [30], differential pulse and square wave voltammetric [31], capillary zone electrophoretic [32,33], high performance thin layer chromatographic (HPTLC) [34][35][36], HPLC [12,[37][38][39][40][41], UPLC [42] and spectrophotometric [28,32,[43...…”