Precision
The intra-day and inter-day precision values were also studied using different concentration of standard THQ in the range
concentration range of calibration curve.
Calibration curve and quality control samples were prepared and three replicate measurements were conducted in a period of three days.
The intra-day coefficient of variation values (precision) was in the range of 2.28 to 6.92 where as inter-day coefficient of variation values (precision) was in the range of 1.21 to 7.55 (Table 2).
These results indicate that the method has good precision and are within the acceptance limit of ≤ 15% and ≤ 15% for precision and accuracy respectively.