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1)  Selectivity coefficient
选择系数
2)  selectance
选择度,选择系数
3)  selectivity [英][silek'tiviti]  [美][sə,lɛk'tɪvətɪ]
选择性系数
1.
A mass transfer equation and equations for evaluating mass transfer coefficients and selectivity have been derived by taking into account the dissociation of ammonia in water.
针对气扫式膜蒸馏脱除水中氨的过程,以传质基本理论为依据,导出了考虑水中氨解离的总传质系数表达式,并建立了利用实验结果计算总传质系数和选择性系数的方程。
2.
The effect of H2SO4 concentration and reaction time on the xylose yield and the selectivity of hemicellulose hydrolysis in corn stover under 121 ℃ was studied by response surface methodology.
通过响应曲面法,研究了反应温度为121℃时,不同硫酸浓度和反应时间对玉米秸秆中半纤维素水解为木糖的产率以及选择性系数的影响。
4)  selectivity coefficient
选择性系数
1.
The ion selectivity coefficient was detected and the effect of different pH value was investigated.
实验测定了F-的选择性系数,并选择了测定F-的适宜pH范围。
2.
This paper adopts with experiment report form to mix the solution selectivity coefficient of equipotential law mensuration fluorine electrode, determine to survey F~-suitable pH scope, survey the content of fluorine in running water respectively with the standard and method of calibrating curve by addition of law.
采用混合溶液等电位法测定氟电极的选择性系数,确定了测定F-的适宜pH范围,用校正曲线法和标准加入法分别测定了自来水中氟的含量。
3.
In this paper, the theory and methods of detetermination and the design of testing system for ion exchange selectivity coefficient are described.
本文叙述了离子交换选择性系数的测定原理、测定方法以及试验体系的设计;实测了强酸阳树脂RH-Na、RNa-Ca和RH-Ca交换体系的选择性系数,并对不同条件时选择性系数的规律性作了初步探讨,得出了不同条件时选择性系数的一般规律。
5)  optional separating parameter
选择脱除系数
1.
The effect of current density on different performance(single desalting or deacid rate,electricity consumption,electric current frequency,optional separating parameter)in the course of separation relating to the electroanalysis separation containing Na 2SO 4 and CH 3COOH wastewater was studied.
论述了含硫酸钠与乙酸废水电渗析分离中 ,电流密度对分离过程中各种性能参数 [单程脱盐 (酸 )率、耗电量、电流效率、选择脱除系数 ]的影响 ,通过对选择脱除系数的分析 ,提出了通过控制电流密度而达到电渗析分步切割分离硫酸钠与乙酸的可能性。
6)  ion selectivity coefficient
离子选择性系数
1.
The results show that a linear Nernst response is exhibitedfor H+、K+、Pb2+、Ni2+、Co2+、Fe3+, and the ion selectivity coefficient of Nation membrane for K+ isbetter than Ni2+ and Fe3+.
研究了Nafion117膜(一种全氟磺酸膜)对阳离子的选择性,测定了含K~+、Ni~(2+)及Fe~(3+)的Nafion 117膜的离子选择性系数,实验发现含H~+、K~+、Pb~(2+)、Ni~(2+)、Co~(2+)、Fe~(3+)等离子的膜都能较好符合Nemst响应。
补充资料:选择透过系数
分子式:
CAS号:

性质:表示离子交换膜对电荷相同的异种离子的选择透过性能,用S来表示:,式中,EA、EB分别为A、B离子在膜中的迁移数,CA、CB分别为A、B离子在溶液中的浓度。影响膜选择透过系数的因素较多,如离子种类、膜的性能等。 

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