220_002 #04 FOOD & BEVERAGE A P P L I C AT I O N N O T E Page : 1 CARBOHYDRATES IN FOOD THE FINEST LC-EC APPLICATIONS FOR FOOD & BEVERAGE ANALYSIS EVER PROCESSED INTRODUCTION Carbohydrates not only provide the most easily accessible energy source for our body‚ they also play an important role in many physiological processes. They are involved in intercellular recognition‚ infection processes‚ and certain types of cancer. Carbohydrates analysis is of interest to the food industry but
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Lab BCH 2333 Section: Lab 1 Carbohydrates: Separation Techniques Based on Molecular Size TA: Wednesday‚ January 16th‚ 2013 Team #4 By: Partner: Purpose The purpose of this experiment is to exemplify how differences in molecular weight allow separation of polymers from their monomers. Methods of dialysis and gel filtration chromatography will be used to separate a glucose monomer from a starch polymer. Colorimetric
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Size Exclusion Chromatography Size Exclusion Chromatography (SEC) is the separation technique based on the molecular size of the components. Size exclusion chromatography is a kind of method to separate different size of molecules that put in solution. It was first discovered by two scientists who named Grant Henry Lathe and Colin R Ruthven. Both of them received the John Scott Award for this fabulous invention. There are various applications for Size exclusion chromatography such as biochemical
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Enrico Miguel S. Dizon Date Performed: April 22‚ 2013 2012-58079 Experiment # 4 Paper Chromatography 1. Why is the chromatogram developed in an essentially closed system? - The chromatogram is developed in a closed system in order to prevent the solvent to evaporate. Most solvents used in the chromatograph are toxic and flammable. It is also put in a close system to reduce the chance of outside factors affect
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Unit 4 Review. 1. Which is not a method for collecting a toolmark on a doorframe? a. casting that portion of the doorframe b. photography b. removing that portion of the frame c. making a rubbing of the mark on the frame 2. Which tool most likely made these striations? a. pry bar b. screwdriver c. Pliers d. bolt cutter 3. Analysis of radial cracks from three impacts revealed that cracks from A stopped at cracks from Z. Cracks from Z stopped at cracks from B. Which is the correct order of the impacts
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ESTIMATION OF COLCHICINE:In the first method for extraction (Method 1)[1]‚ 0.5 g of powdered plant material was extracted twice with 25 ml of petroleum ether with frequent shaking for 1 h‚ followed each time by filtration. The solid residues were air dried and then extracted with 10 ml of dichloromethane at room temperature for 30 min with frequent shaking. Then 10% solution of ammonia (0.5 ml) was added to the mixture with vigorous shaking for 10 min; the mixture was left undisturbed for 30 min
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GRAVIMETRIC DETERMINATION OF SULFATE Purpose You will be given a solid powder‚ which has been dried to constant mass. The sample is water soluble. The purpose of this experiment is to determine the concentration of sulfate in your solid sample using gravimetric analysis. Background Gravimetric Analysis The goal of most quantitative chemical analysis measurements is to estimate the relative abundance of an analyte in a chemical sample. For solid and liquid samples‚ a very common expression
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FACH2702 Practical Analysis of imposter perfumes Aim: To determine which out of 4 unknown samples are genuine perfumes‚ and which are imposter/fake perfumes. This will be done by analysing gas chromatography plots‚ and comparing the components in the samples to that of a known standard perfume. Results: To determine which of the four sample perfumes where imposter and which were real‚ components present in each perfume were analysed using gas chromatography and compared to the known
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Absorption Spectroscopy Author: Cesar M. Lemas Lab Partners: Jahnnan Jayesh Patel‚ Myong Ho Lee & Salem Alsaif Instructor: Jordan Andrew Mudery Chem 151‚ Section 7D Date Work Performed: October 18th 2012 Date Report submitted: October 25th 2012 Abstract Absorption spectroscopy is a practical way to find what the light absorption of a substance is‚ and whit this data combining the Beer’s law equation you can determine the concentration of different things in a solution‚ in
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Objective In this experiment we would be ascertaining the percentage content of ethanol in 3 samples (spirit‚ wine and a beer). We would be comparing the concentration of ethanol to that of 25%propanol which would act as an internal standard. Method To set up the standards for a calibration curve we would make solutions of different concentrations of ethanol. Using a 25cm3 volumetric flask we would put 10cm3 of 25% Propanol into each one which would act as an internal standard. We would
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