Resonance Rayleigh scattering method for the determination of chitosan using erythrosine B as a probe and PVA as sensitization

Green synthesis of fluorescent carbon dots with antibacterial activity and their application in Atlantic mackerel (Scomber scombrus) storage

“…Britton–Robinson (B–R) buffer solutions of different pH were prepared according to the method reported in a previous publication. 24 Briefly, the B–R buffer was a mixture of 0.04 mol L −1 of acetic acid, boric acid, and phosphoric acid, and its pH was adjusted in the range from 2.0 to 11.0 with 0.2 mol L −1 of sodium hydroxide. The fluorescence stability of the carbon dots was determined by measuring the fluorescence intensity of a mixture of 0.2 mL of carbon dots aqueous solution (2 mg mL −1 ) and 1.8 mL of B–R buffer with different pH at the maximum excitation wavelength.…”

Application of Gelatin Decorated with Allura Red as Resonance Rayleigh Scattering Sensor to Detect Chito-Oligosaccharides

“…When the RRS band of COS-gelatin-AR system was located at or close to its absorption band, electrons absorbed electromagnetic wave at the same frequency as scattering frequency. Because of the resonance of the scattering light and the absorption light at the same frequency, electrons strongly absorbed the energy of light and generate re-scattering, which resulted in the significant enhancement of the RRS intensity [19,43]. As shown in Figure 4a, the three resonance scattering peaks at 289 nm, 344 nm, and 471 nm were all in the molecular absorption band of COS-gelatin-AR system.…”

“…For each controlling factor, three different levels were selected. The range of choices between the three levels depended on previous laboratory studies, 1.00×10 −5 mol/L, 1.50 × 10 −5 mol/L and 2.00 × 10 −5 mol/L for A, 1.00 × 10 −2 g/L, 1.50 × 10 −2 g/L and 2.00 × 10 −2 g/L for B, 0.30 mL, 0.50 mL, and 0.70 mL for C. The test conditions were designed according to the L 9 (3 4 ) orthogonal test, and the test index was performed with RRS intensity [19]. The original data was analyzed using an orthogonal experimental design.…”

“…It is noteworthy that resonance Rayleigh scattering (RRS) has been widely applied to quantitative analysis [18][19][20][21][22] due to its sensitivity, rapidity and simplicity. In recent years, single-wavelength resonance Rayleigh scattering (SW-RRS) methods [23][24][25][26] were widely used in research, but more scholars were gradually adopting multi-wavelength resonance Rayleigh scattering (Multi-RRS) research.…”

Resonance Rayleigh scattering and spectrofluorimetric approaches for the selective determination of rupatadine using erythrosin B as a probe: application to content uniformity test

“…Erythrosin B has been selected for assays applying fluorometric and RRS techniques to determine propranolol, fluoroquinolones, tetracaine hydrochloride, and chitosan. [ 26–29 ] In this work, RRS and spectrofluorimetric techniques were used for the first time to determine the studied drug in its pharmaceutical formulation through complex formation with erythrosin B. The proposed spectrofluorimetric method relied on measuring the quenching effect of RPT on fluorescence intensity of erythrosin B.…”