Determination of glucose: A kinetics experiment for the analytical course

Toren, E. Clifford

doi:10.1021/ed044p172

Cited by 31 publications

(20 citation statements)

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“…An average migration rate of the adsorption wave of component k in zone n, vnk, is given approximately by the following equation.12'140 VOL. 16 NO. 5 1983 Table 2.…”

Section: Glucose/fructose Separationmentioning

confidence: 99%

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Models for the separation of glucose/fructose mixture using a simulated moving-bed adsorber.

Hashimoto

Adachi

Noujima

et al. 1983

J. Chem. Eng. Japan

126

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The continuous separation of a glucose/fructose mixture wasexperimentally performedusing a simulated moving-bed adsorber packed with the Ca2 + ion form of Y zeolite. In the adsorber, the continuous and countercurrent contact of the liquid stream with the solid adsorbent is simulated by advancing adsorption columns against the fixed inlets and outlets of liquid streams, without actual movementof the solid adsorbent. Two mathematical models, i.e., an intermittent moving-bed and a continuous moving-bed type, are presented for calculating the concentration profiles of glucose and fructose in the simulated moving-bed adsorber. The validity of the models is experimentally confirmed, and a criterion for good separation in the simulated moving-bed adsorber is presented. IntroductionThe most commontype of fructose syrup, usually called a high-fructose syrup, contains 42% fructose, 52% glucose, and 6% oligosaccharides on a dry basis,9) and is used in place of sucrose in some foods and beverages. For some purposes, since fructose is sweeter and moresoluble in water at low temperatures than glucose, a syrup with 55 to 90%fructose, called a higher-fructose syrup, is desirable. Isomerization of glucose to fructose, catalyzed by glucose isomerase, is a reversible reaction with an equilibrium constant of 1.0 at 323 K.15) Therefore, to produce a syrup containing more than 50%fructose, a process to separate fructose from the equilibrium mixture is indispensable. A selective adsorption method using ion-exchangers7) seems to be promising for the separation. These methods may be classified into chromatographic and moving-bed operations. The chromatographic separation process is simple, but has the following disadvantages:40 (i) the whole adsorbent bed is not effectively utilized, (ii) a large amount of desorbent is consumed, (iii) a large difference in the adsorption equilibria between adsorbates is required, and (iv) the operation is discontinuous.

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“…An average migration rate of the adsorption wave of component k in zone n, vnk, is given approximately by the following equation.12'140 VOL. 16 NO. 5 1983 Table 2.…”

Section: Glucose/fructose Separationmentioning

confidence: 99%

“…The variable vectors Xt (/= 1 to 6) are related by a set of simultaneous algebraic equations (16), which are obtained from Eqs.…”

Section: A Continuous Moving-bed Modelmentioning

confidence: 99%

Models for the separation of glucose/fructose mixture using a simulated moving-bed adsorber.

Hashimoto

Adachi

Noujima

et al. 1983

J. Chem. Eng. Japan

126

View full text Add to dashboard Cite

show abstract

“…In the case of glucose, the eluate was collected with a fraction collector, and the concentration was determined by the glucose oxidase method. 15) Determination of particle size.…”

Section: Discussionmentioning

confidence: 99%

“…(24) essentially coincides with Eq. (15), since in the latter the term of molecular diffusion is eliminated. Billmeyer et al [9][10][11] also proposed a similar form for Eq.…”

Section: Column Efficiencymentioning

confidence: 99%

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Analysis of Dispersion Mechanism in Gel Chromatography

Nakanishi

Yamamoto

Matsuno

et al. 1977

Agricultural and Biological Chemistry

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Modeling and Application of UF-Stirred Cell Reactors in Hydrolysis of Saccharides

Sohrabi¹,

Kargari

1999

Chem. Eng. Technol.

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Hydrolysis of sucrose by invertase as a typical example of saccharides enzymatic hydrolysis has been conducted in a UF-stirred cell reactor. A model has been derived by which the effect of some pertinent variables, such as membrane pore size, applied pressure, substrate concentration and stirring speed, on the performance capability of such systems may be predicted. A close correlation has been found between the experimental results obtained under a wide range of operating conditions and those calculated from the model.

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Determination of glucose: A kinetics experiment for the analytical course

Abstract: This determination of glucose demonstrates both kinetic and enzymatic methods of analysis.

Cited by 31 publications

References 0 publications

Models for the separation of glucose/fructose mixture using a simulated moving-bed adsorber.

Models for the separation of glucose/fructose mixture using a simulated moving-bed adsorber.

Analysis of Dispersion Mechanism in Gel Chromatography

Modeling and Application of UF-Stirred Cell Reactors in Hydrolysis of Saccharides

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