选择性系数=(萃取相中A的质量分数/萃取相中B的质量分数)/(萃余相中A的质量分数/萃余相中B的质量分数）=Ka/Kb，则选择性系数 为组分A、B的分配系数之比
电位选择性系数(selectivity coefficient) ： 符号及定义： 电位选择性系数表示 ISE 对某种离子响应的选择性，用 Ki,j 或表示。
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报道了氯离子掺杂的聚苯胺膜对一些阴离子均有电位响应，测定了一些阴离子的选择性系数。
Peak current is decreased with the increase scan times. Potential response of chloride doped polyaniline film to anion is reported and selective coefficient of some anion is measured.
作为实际应用，本文导出了分离同位素时分离系数的计算公式和用短脉冲的选择性激发同位素必须满足的条件以及激发速率的计算方法。
The article contains the derivations of the formula of separate coefficient, the conditions of the selective optical excitation and the excited rate for isotope separation as an actual application.
在海冰覆盖的条件下，PAR的观测结果与无冰海水的PAR有明显差别。由于海冰选择性的吸收，穿透海冰进入海洋的PAR组分已经不同，海水对PAR的衰减系数也会相应变化。
But under sea ice, the attenuation coefficient of PAR is little bit different, as the spectrum of the light has been changed by selective absorption through the sea ice.
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