A rapid and highly sensitive stability-indicating high-performance thin-layer chromatography technique for the determination of tedizolid phosphate with a classical univariate calibration

No high-performance thin-layer chromatography (HPTLC) techniques have been established for the determination of tedizolid phosphate (TDZP) in pharmaceutical products or physiological fluids. Therefore, a rapid and highly sensitive stability-indicating HPTLC technique has been developed for the determination of TDZP in commercial formulations with a classical univariate calibration. The HPTLC‒densitometry analysis of TDZP was carried out via chloroform‒methanol (90:10, V/V) mobile phase. The determination of TDZP was performed at the wavelength of 300 nm. The proposed HPTLC technique was linear in the range of 10‒2000 ng band^‒1. In addition, the method was found to be highly accurate (% recovery = 98.53‒101.74%), precise (%CV = 0.67‒0.91%), robust (%CV = 0.83‒0.86%), highly sensitive (LOD = 3.41 ng band^‒1, LOQ = 10.23 ng band^‒1) for the determination of TDZP. The proposed technique was also able to detect TDZP in the presence of its degradation products under various stress conditions and it can be considered as a stability-indicating method. The proposed HPTLC technique was applied for the analysis of TDZP in its commercial formulations. The TDZP contents of commercial tablets and injection were determined as 98.41% and 101.23%, respectively. These results suggested that the proposed HPTLC technique can be applied for the routine analysis of TDZP in its commercial products and newly established formulations.