The standard adding recovery ratio of methyl parathion on Chinese chives 'sample reaches 83.5%, and can meet the detecting requirement of residues for the pesticide in vegetables.
韭菜中甲基对硫磷的标准添加回收率为83.5%，可满足这种杀虫剂在蔬菜中残留量检测的要求。
Using baicalin as the standard sample, the flavone substances in pollen of Yunnan pine were determined through methyl alcohol back flow extraction and ultraviolet spectrophotometer.
以黄芩甙为标样，对云南松花粉中黄酮类化合物采用甲醇回流提取，用紫外分光光度法进行测定。
Using baicalin as the standard sample, the flavone substances in pollen of Yunnan pine were determined through methyl alcohol back flow extraction and ultraviolet spectrophotometer.
以黄芩甙为标样，对云南松花粉中黄酮类化合物采用甲醇回流提取，用紫外分光光度法进行测定。
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