시료의 흡광도를 보정해 주기 위해 시료 20㎕와 증류수 80㎕를 혼합시켜준 뒤 650㎚ 흡광도를 측정하였다.
In order to correct the absorbance of the sample, 20µl of the sample and 80µl of distilled water were mixed and the absorbance of 650 nm was measured.