I wanna calculate the efficiency of an electrochemical detection of heavy metal ion using SWASV
Hello, Salah Eddine Berrabah have you seen in any article the efficiency of an electrochemical sensor as a magnitude that can be calculated? I ask this because I see that they commonly use the term "efficient sensor" or "highly efficient sensor" but there is no efficiency quantity that can be calculated to characterise the sensor. I think that "efficient" in the case of electrochemical sensors is a confusing concept. In optical sensors, efficiency refers to the number of electrons generated as an instrumental response per number of photons input, and is a quantity that can be calculated or determined. But in electrochemical sensors I have seen that the term "efficient" sometimes refers to sensitivity, but I do not see a generalisation of the concept per se. Some authors consider analytical efficiency as the ability of the analysis to save costs and time. However, the term "efficiency" is not an analytical parameter of the quality of an analytical method, as I said, it can be a parameter referring to the instrumental response, but I am not clear about its use in electrochemical terms. I know there is a concept called "charge transfer efficiency" but it is not clear that this is what they mean when they use it in a sensor. I don't know if you find my answer helpful and I'll keep an eye out if anyone else responds as well and has a clearer idea of the issue. Regards.
Javier Ernesto Vilaso Cadre, bravo!
There is indeed no such thing as “efficiency”, which is quantified for (electro)chemical sensors, and “efficient” is a confusing term in regard to them. If we look at the IUPAC Orange Book, we will see that “efficiency” is among the terms used in photochemistry and in light scattering. One can talk about luminous efficiency, quantum efficiency (quantum yield), scattering efficiency, and other concepts of physics. The charge-transfer efficiency is directly related to radiation detectors (charge-transfer devices) rather than electrochemical detectors. Sometimes there is a mention of efficient (analytical) methodology but not in quantitative terms. To sum up, “efficiency” is not among the terms characterizing analytical properties of an electrochemical sensor.
Regards,
Rouvim Kadis
Rouvim Kadis thank you Dr. It is good that you contribute to clarify this because as you say it is a confusing term in the case of electrochemical sensors, and I see that it is used a lot especially in the titles of articles, I guess it is a way to make the title attractive. Regards.
Hello everyone,
Thank you Mr Javier Ernesto and Mr Rouvim Kadis for taking the time to answer my question. However, eventhough i'm well aware of the misunderstanding regarding the term "efficiency" in electrochemical sensors, but i asked the question because it have been asked by a reviewer of one of my under-review articles and when i did my researches about it i found some works where they calculate and company efficiency values.
Please check this article for example: https://doi.org/10.1016/j.jelechem.2019.113744
Yes Salah Eddine Berrabah , in effect they calculate the efficiency, but it is the removal efficiency, in which case it does make sense to speak of efficiency. In this work they use the nanocomposite to use it as a sensor but also to remove contaminants. The removal efficiency is the ratio between the final concentration and the initial concentration. That is, if you have an initial concentration of 10 mg/L of Pb, and after the removal by electrodeposition the concentration of the Pb solution is 5 mg/L, then the removal efficiency is (5/10)*100 = 50%. But this efficiency is not of the sensor, is the Pb removal efficiency by electrodeposition using the nanocomposite.
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