Three host trees of Chinese gall nut, i.e., Pistacia chinensis, Rhus chinensis, and R. punjabensis var. sinica, were studied for their tannin content with ultraviolet spectrophotometry.

• 本文采用紫外分光光度法分析研究了黄连木、盐肤木6个部位及红麸杨叶片的单宁含量。