The roots contained the highest specific
concentration of anthraquinone at 103.2 ± 4.8 mg/
g dried mass (Figure 3, (0.172 ± 0.008 mg/ml)/
(0.05 g/30 ml) = 103.2 ± 4.8 mg/g), followed by
stem (45.3 ± 6.3 mg/g), bark (6.90 ± 0.3 mg/g)
and leaf (1.20 ± 0.6 mg/g). This was compared to
the maximum concentration of 1.2 mg/g
anthraquinone glycoside and 2.0 mg/g total
anthraquinone from C. siamea dried leaf
(Kritsanapan and Nualkaew, 2003).