Kinetic identification of three metal ions by using a Briggs-Rauscher oscillating system

Zhou, Ying; Uddin, Waqar; Hu, Gang

doi:10.1016/j.microc.2020.105617

Cited by 2 publications

(2 citation statements)

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“…A chemical clock reaction is a process where a periodic change in intermediate concentration (or specific color) happens with the progress of a reaction [ 28 ]. One of the methods here applied is the clock Briggs–Rauscher (BR) oscillatory reaction method [ 29 ]. It is a well-known method for determining unknown concentrations of an active (reactive) analyte [ 29 , 30 , 31 ], its antioxidant/antiradical activity [ 32 , 33 , 34 , 35 , 36 , 37 ], as well as distinguishing insoluble material such as bronzes [ 38 , 39 , 40 ] and bentonite clays [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

“…One of the methods here applied is the clock Briggs–Rauscher (BR) oscillatory reaction method [ 29 ]. It is a well-known method for determining unknown concentrations of an active (reactive) analyte [ 29 , 30 , 31 ], its antioxidant/antiradical activity [ 32 , 33 , 34 , 35 , 36 , 37 ], as well as distinguishing insoluble material such as bronzes [ 38 , 39 , 40 ] and bentonite clays [ 41 ]. However, this is the first attempt to use the BR reaction for determining some dyes (in a commercial sample).…”

Section: Introductionmentioning

confidence: 99%

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Indigo Carmine in a Food Dye: Spectroscopic Characterization and Determining Its Micro-Concentration through the Clock Reaction

Pagnacco

Maksimović²,

Nikolić³

et al. 2022

Molecules

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Indigo carmine is a commonly used industrial blue dye. To determine its concentration in a commercially available food dye composed of a mixture of indigo carmine and D-glucose, this paper characterizes it through (ATR, KBr) FTIR micro-Raman as well as UV/Vis and clock: Briggs–Rauscher (BR) oscillatory reaction methods. The indigo carmine was detected in the bulk food dye only by applying micro-Raman spectroscopy, indicating a low percentage of the indigo carmine present. This research provides an improvement in the deviations from the experimental Raman spectrum as calculated by the B97D/cc-pVTZ level of theory one, resulting in a better geometrical optimization of the indigo carmine molecule compared to data within the literature. The analytical curves used to determine indigo carmine concentrations (and quantities) in an aqueous solution of food dye were applied by means of UV/Vis and BR methods. BR yielded significantly better analytical parameters: 100 times lower LOD and LOQ compared to commonly used UV/Vis. The remarkable sensitivity of the BR reaction towards indigo carmine suggests that not only does indigo carmine react in an oscillatory reaction but also its decomposition products, meaning that the multiple oxidation reactions have an important role in the BR’s indigo carmine mechanism. The novelty of this research is the investigation of indigo carmine using a clock BR reaction, opening new possibilities to determine indigo carmine in other complex samples (pharmaceutical, food, etc.).

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