y**x 发帖数: 3 | 1 关于过氧化氢和次氯酸溶解于水中后的氧化还原电动势大小(用ORP meter测)
氧化还原电动势表中过氧化氢的值是1.766, 次氯酸是1.482.
似乎前者测出的结果会大些,实际上后者测处的结果更大。有个公司的说明书解释为:
my factors affect the actual OPR response that are not defined by the
Nernst Equation. These include slow electrode kinetics, the pH effect on
acid dissociation constants, electrode poisoning (clogging), dissolved
oxygen, and even the flow rate of solution over the probe surface.
我还是不懂后面罗列的原因,具体怎么影响了过氧化氢的结果。另外,臭氧的理论结果是
2.07, 好像试验结果也小很多?请问怎么解释?真实的ORP meter测出的三着大小顺序如
何?谢谢大家予以指导。 | y**e 发帖数: 1063 | 2 ORP meter 测试的可能是电极表面氧化/还原物的活度(浓度)比值
电极表面的浓度被上述罗列的原因影响,Nernst equation?
果是
序如
【在 y**x 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 关于过氧化氢和次氯酸溶解于水中后的氧化还原电动势大小(用ORP meter测) : 氧化还原电动势表中过氧化氢的值是1.766, 次氯酸是1.482. : 似乎前者测出的结果会大些,实际上后者测处的结果更大。有个公司的说明书解释为: : my factors affect the actual OPR response that are not defined by the : Nernst Equation. These include slow electrode kinetics, the pH effect on : acid dissociation constants, electrode poisoning (clogging), dissolved : oxygen, and even the flow rate of solution over the probe surface. : 我还是不懂后面罗列的原因,具体怎么影响了过氧化氢的结果。另外,臭氧的理论结果是 : 2.07, 好像试验结果也小很多?请问怎么解释?真实的ORP meter测出的三着大小顺序如 : 何?谢谢大家予以指导。
| y**x 发帖数: 3 | 3 谢谢你的解答。我找到一个公司的宣传品上和这相关的解释如下,我不太明白,望指点。
Note that the dissociation constant (pKa) of hydrogen peroxide is 11.62,
and hydrochlorous acid (HOCl) is 7.4, expressed in terms of pH. It then
becomes obvious that the peak activity of the E0 for hypochlorous acid is
very near the pH of the water being treated, and the H2O2 is considerably
higher. Thus, H2O2 would express a much lower ORP value at pH 7.4 than
would hypochlorous due to the vast difference in the pKa constant.
谢谢!
【在 y**e 的大作中提到】![](/moin_static193/solenoid/img/up.png) : ORP meter 测试的可能是电极表面氧化/还原物的活度(浓度)比值 : 电极表面的浓度被上述罗列的原因影响,Nernst equation? : : 果是 : 序如
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