Based on the principle of group electronegativity, through mathematical deduction, the author deduced the method for the comparison of the selectivity of floatation collectors.
以基团电负性原理为基础，通过数学推导导出了一种比较浮选捕收剂选择性的方法。
A simple method for calculating the standard formation heats of organic compounds containing nitrogen or sulfur by using of the group electronegativity is built up in this paper.
建立了用基团电负性计算含氮含硫有机物键裂能的简单方法，并且得到自由基标准生成热的计算方法。
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