The linear regression analysis data for the calibration curve shows good linear relationship with correlation coefficient of 0.998 in the concentration range of 0.07-12 μg/mL.
The limit of detection and limit of quantification were 0.023 and 0.07 μg/mL, respectively.
The developed method was validated for accuracy, precision, reproducibility, and robustness as per ICH guidelines.
The proposed method with high degree of precision and accuracy is employed for the estimation of thymoquinone in methanolic and petroleum extract of Nigella sativa as well as in formulation.
Statistical analysis proved that the method is precise, reproducible, selective, and accurate for the estimation of thymoquinone for quality control purpose.