Research as a guide for curriculum development: An example from introductory electricity
Research as a guide for curriculum development: An example from introductory electricity
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研究作为课程开发的指南：以电导论为例
DOI：
10.1119/1.17003
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
L. McDermott
中科院分区：
文献类型：
--
作者：
P. Schaffer;L. McDermott
一种用于测定水溶液中酚的量的方法和装置，该溶液经过处理以去除其中的干扰杂质。经处理的水溶液经电解交替转化，使其具有预先选定和控制的pH值，变为酸性或碱性。这些酸性和碱性溶液受到预先选定波长的紫外线辐射，以便在预先选定的pH值下通过的辐射量可以测量。将通过酸性溶液和碱性溶液的紫外线辐射量进行比较，以确定水溶液中酚类物质的浓度。
A method of and apparatus for determining the quantity of phenols in an aqueous solution after treating the solution to remove interfering impurities therefrom. The treated aqueous solution is electrolytically alternately converted so as to be either acidic or basic with preselected and controlled pH values. These acidic and basic solutions are subjected to ultraviolet radiation at a preselected wavelength so that the amount of radiation passing therethrough at the preselected pH values can be measured. The measured amounts of ultraviolet radiation passing through the acidic and basic solutions are compared to determine the concentration of phenols in the aqueous solution.