Table 3.
Extraction Yields According to the Liquor Ratio When Using the Same Amount of NaOH

Liquor Ratio (w/w)	NaOH (g)	Extraction Yield (%)
5	0.125	56.99
6.25		57.37
8		56.93
12.5		56.20

Extraction time: 1 h, Radiata pine bark: 1 g (o.d)