Problem and Solution of UV–Vis Time-Based Measurements of a Chemical System Involving Gas Product: Application to the Bray–Liebhafsky Oscillatory Reaction
Само за регистроване кориснике
2021
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Ultraviolet (UV)–visible (Vis) spectroscopy is widely used in all modern laboratories as a routine method of analysis. The monitoring of chemical reactions in an aqueous solution involving a gas product is a demanding task but particularly for oscillatory reactions which are obtainable in a narrow concentration range. In this work, the optimization of experimental conditions for UV–Vis measurements of the Bray–Liebhafsky (BL) oscillatory reaction producing oxygen was done by using an internal standard. After applying the method of the internal standard on iodine absorbance at 460 nm, the characteristic BL oscillatory parameters (and iodine changes) are clearly evident. The obtained results allow students to apply their existing knowledge and, through a simple experimental setup, understand the importance of the internal standard, but at the same time, they show how they can solve the problem of UV–Vis noise during the time-based measurements of reactions involving gas products in gener...al.
Кључне речи:
Upper-Division Undergraduate / Laboratory Instruction / Analytical Chemistry / Physical Chemistry / Inorganic Chemistry / Aqueous Solution Chemistry / Oxidation/Reduction / Reactions / Spectroscopy / Undergraduate Research / UV−VisИзвор:
Journal of Chemical Education, 2021, 98, 12, 4026-4030Издавач:
- American Chemical Society (ACS)
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (RS-MESTD-inst-2020-200026)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200146 (Универзитет у Београду, Факултет за физичку хемију) (RS-MESTD-inst-2020-200146)
DOI: 10.1021/acs.jchemed.1c00718
ISSN: 0021-9584
WoS: 000731641200050
Scopus: 2-s2.0-85120644547
Институција/група
IHTMTY - JOUR AU - Erceg, Ružica AU - Maksimović, Jelena AU - Pagnacco, Maja PY - 2021 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6842 AB - Ultraviolet (UV)–visible (Vis) spectroscopy is widely used in all modern laboratories as a routine method of analysis. The monitoring of chemical reactions in an aqueous solution involving a gas product is a demanding task but particularly for oscillatory reactions which are obtainable in a narrow concentration range. In this work, the optimization of experimental conditions for UV–Vis measurements of the Bray–Liebhafsky (BL) oscillatory reaction producing oxygen was done by using an internal standard. After applying the method of the internal standard on iodine absorbance at 460 nm, the characteristic BL oscillatory parameters (and iodine changes) are clearly evident. The obtained results allow students to apply their existing knowledge and, through a simple experimental setup, understand the importance of the internal standard, but at the same time, they show how they can solve the problem of UV–Vis noise during the time-based measurements of reactions involving gas products in general. PB - American Chemical Society (ACS) T2 - Journal of Chemical Education T1 - Problem and Solution of UV–Vis Time-Based Measurements of a Chemical System Involving Gas Product: Application to the Bray–Liebhafsky Oscillatory Reaction VL - 98 IS - 12 SP - 4026 EP - 4030 DO - 10.1021/acs.jchemed.1c00718 ER -
@article{ author = "Erceg, Ružica and Maksimović, Jelena and Pagnacco, Maja", year = "2021", abstract = "Ultraviolet (UV)–visible (Vis) spectroscopy is widely used in all modern laboratories as a routine method of analysis. The monitoring of chemical reactions in an aqueous solution involving a gas product is a demanding task but particularly for oscillatory reactions which are obtainable in a narrow concentration range. In this work, the optimization of experimental conditions for UV–Vis measurements of the Bray–Liebhafsky (BL) oscillatory reaction producing oxygen was done by using an internal standard. After applying the method of the internal standard on iodine absorbance at 460 nm, the characteristic BL oscillatory parameters (and iodine changes) are clearly evident. The obtained results allow students to apply their existing knowledge and, through a simple experimental setup, understand the importance of the internal standard, but at the same time, they show how they can solve the problem of UV–Vis noise during the time-based measurements of reactions involving gas products in general.", publisher = "American Chemical Society (ACS)", journal = "Journal of Chemical Education", title = "Problem and Solution of UV–Vis Time-Based Measurements of a Chemical System Involving Gas Product: Application to the Bray–Liebhafsky Oscillatory Reaction", volume = "98", number = "12", pages = "4026-4030", doi = "10.1021/acs.jchemed.1c00718" }
Erceg, R., Maksimović, J.,& Pagnacco, M.. (2021). Problem and Solution of UV–Vis Time-Based Measurements of a Chemical System Involving Gas Product: Application to the Bray–Liebhafsky Oscillatory Reaction. in Journal of Chemical Education American Chemical Society (ACS)., 98(12), 4026-4030. https://doi.org/10.1021/acs.jchemed.1c00718
Erceg R, Maksimović J, Pagnacco M. Problem and Solution of UV–Vis Time-Based Measurements of a Chemical System Involving Gas Product: Application to the Bray–Liebhafsky Oscillatory Reaction. in Journal of Chemical Education. 2021;98(12):4026-4030. doi:10.1021/acs.jchemed.1c00718 .
Erceg, Ružica, Maksimović, Jelena, Pagnacco, Maja, "Problem and Solution of UV–Vis Time-Based Measurements of a Chemical System Involving Gas Product: Application to the Bray–Liebhafsky Oscillatory Reaction" in Journal of Chemical Education, 98, no. 12 (2021):4026-4030, https://doi.org/10.1021/acs.jchemed.1c00718 . .