Table S5.

Detection results of blank sample

Times	OD (450 nm)		Times	OD (450 nm)	Times	OD (450 nm)		Times	OD (450 nm)
1	0.056		6	0.058	11	0.054		16	0.06
2	0.043		7	0.061	12	0.056		17	0.058
3	0.058		8	0.054	13	0.043		18	0.044
4	0.042		9	0.065	14	0.068		19	0.055
5	0.057		10	0.057	15	0.061		20	0.065
Mean (M)		0.056		SD	0.008		M + 2SD		0.071

Abbreviation: OD, optical density.