Effect of ethanol, glycerol, glucose/fructose and tartaric acid on the refractive index of model aqueous solutions and wine samples

Determination of sugar content in honey using LC-Raman and programmable pump-Raman methods

“…The dependence of n on the concentration of the 1 : 1 mixture of glucose and fructose ( c sugar ) is given as n = 1.3329 + 0.000135 c sugar (g L −1 ) at 20 °C. 37 The calculated n was 1.3329 at 0 mM and 1.3572 at 1000 mM, which was an increase of 1.8%. The critical angle at the interface with air ( n = 1.00) should decrease from 48.6° at 0 mM to 47.5° at 1000 mM, and the divergence angle of the output Raman signals at the pinhole of the VF unit should increase from 122° to 133°.…”

Highly sensitive refractive index sensor by floating nano-particles in the solution for the detection of glucose/fructose concentration

“…Because of its good resolution, a plasmonic sensor can be used to measure glucose/fructose density in a liquid. In [32], the value of the refractive index of a model aqueous solution containing glucose/fructose has been measure and recorded. In this reference, by the regression analysis of experimental data, the equation below has been proposed to obtain the refractive index of the liquid solution including glucose/fructose: n=1.3329 + 0.000135*(glucose/fructose) (g/L)…”

Kinetic Modeling of Glucose Oxidation to Tartaric Acid over Monometallic Pt/TiO2 and Bimetallic AuPt/TiO2 Catalysts: Role of Bimetals on C–H and C–C Cleavages

“… , Traditionally, it was obtained as a crude solid byproduct from wine fermentation. , The productivity and quality were strongly influenced by the growth of grapes and climatic conditions . A chemical synthesis method using maleic anhydride has been found to significant discharge wastewater containing heavy metals. − Enzyme catalysis is another effect way to produce TA, owing to high substrate conversion and product purity. , Specifically, maleic acid is epoxidized to cis -epoxy succinic acid, after which utilizes relevant hydrolase produced by microorganisms to obtain TA. , However, biotransformation technologies still suffer from low productivity. , An alternative method involving direct synthesis of TA from glucose oxidation using bimetallic AuPt/TiO 2 catalysts has been reported recently. , This synthetic method provides a promising route for the production of various downstream polymers and pharmaceutical products. − …”

“…22,23 An alternative method involving direct synthesis of TA from glucose oxidation using bimetallic AuPt/TiO 2 catalysts has been reported recently. 24,25 This synthetic method provides a promising route for the production of various downstream polymers and pharmaceutical products. 26−28 To our best knowledge, current efforts in synthesis of TA have been primarily focused on investigations of catalyst performances.…”