An approved, straightforward, fast, and delicate spectrofluorimetric strategy was developed for the estimation of tepotinib (TEPO), sotorasib (SOTO), and darolutamide (DARO) as new antineoplastic drugs. The spectrofluorimetric strategy was based on quantitative fluorescence quenching of MER at 538 nm after being excited at 350 nm by the addition of the cited drugs in the presence of acetate buffer (pH 3.5). The degree of fluorescence quenching was directly proportional to the concentrations of the cited drugs within the concentration range of 0.5-10.0, 0.2-10, and 0.4-10.0 μg ml À1 for TEPO, SOTO, and DARO, respectively. Mean ± standard deviation (SD) were calculated for the studied drugs as follows; 99.9 ± 0.87, 99.72 ± 1.08, and 100.21 ± 1.44, for TEPO, SOTO, and DARO, respectively. Limit of detection (LOD) values were 0.16, 0.05, and 0.11 μg ml À1 , whereas limit of quantitation (LOQ) values were 0.5, 0.15, and 0.36 μg ml À1 for TEPO, SOTO, and DARO, respectively. Statistical comparison through detailed strategies produced greater understanding and found that there were no noteworthy contrasts in exactness and exactness between strategies. The proposed strategy was used effectively to analyze the measurement of different forms of the examined drugs. Moreover, the recommended fluorimetric strategy was used for examination of TEPO, SOTO, and DARO in human plasma and urine tests.
