附录:
1
23456789没食子酸标准溶液
(m L )0.00.10.2
0.4
0.6
0.8
1.0
--没食子酸标准溶液浓
度(μg/mL )0.008.86
17.7235.4453.1670.8888.60--样品(m L )------- 1.0 1.0蒸馏水(m L )
2.0 1.9 1.8 1.6 1.4 1.2 1.0 1.0 1.0福林分溶液(m L )0.50.50.50.50.50.50.50.50.5Na 2CO 3溶液(mL)
3.0
3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0定容(ml)10.010.010.010.010.010.010.010.010.0A (λ=517nm)0.000
0.065
0.1810.3030.4400.5210.6510.555
0.550
表一 茶多酚含量的测定