Tie B R, Niu F X
Faculty of Chinese Pharmacy, Beijing College of Traditional Chinese Medicine.
Zhongguo Zhong Yao Za Zhi. 1993 Apr;18(4):217-8, 254.
The experimental results reveal that arsenic content in pig magnetitum is about 5-25 times as in the calcinated samples. Therefore the toxic effect of magnetitum can be eliminated or reduced after it is calcinated.