银杏叶中硼的形态分析

Analysis of Speciation of Boron in the Gingko Leaf

采用连续浸取方法分析银杏叶中硼的分布及形态。结果表明:银杏叶中各形态硼含量(质量分数,%)依次为:醋酸溶解态(34.36)>水溶态(12.82)>螯合态(9.60)>醇溶态(8.38)>残渣态(6.62)>盐溶态(5.66)>盐酸羟胺溶解态(3.21)。测定结果对银杏中有效成分的利用有一定指导意义。

The distribution and speeiation of boron in gingko leaf were analyzed by continuous extraction. The resu.lts show that, the order of boron species amounts （ w/% ） is as follows： HAC soluble （ 34.36 ） 〉 water soluble （ 12.82 ） 〉 chelate （ 9.60 ） 〉 ethanol soluble （8.38） 〉 residual （6.62） 〉 salt soluble （5.66） 〉 NH2OH · HCI soluble （3.21）. The result has instructional significance for the utilization of effective composition of the gingko.