(10 runs) and m is the slope of the calibration curve. The high
values of the slope (3 * 10กำลัง-3 uA/uM) and correlation coefficient
(Rกำลัง2 = 0.994) reflected the sensitivity of the proposed method.
The reproducibility of the proposed methodology was determined
from the 10 different measurements of 10 uM CA and
the relative standard deviation was obtained as 3.3%.