Abstract-Timur Solid phase extraction is a sample preparation technique that overperform liquid /liquid extraction in its efficiency‚ labor intensity and waste disposal. The purpose of this lab is to learn how SPE can be used to identify trace amounts of Vanillin. Stock solution of vanillin in water with concentration of 50 ppm was prepared. Four solutions with concentration of 5 ppm‚ 1 ppm‚ 0.5 ppm and 0.1 ppm were made from stock solution. UV-Vis spectra of standard solution was recorded at 229
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April 04‚ 2014 Fisher Esterification Introduction: Esters are one of the most common derivatives of carboxylic acids and are widely distributed in both nature and industry. A Fischer Esterification is the formation of an ester and water from alcohol and an acid. It is the simplest means of synthesizing an ester and requires the reaction of a carboxylic acid and an alcohol. The general reaction of Fischer esterification is‚ CH3CO2H + ROH ↔ CH3CO2R + H2O (reaction1) CH3COOH + ROH ↔
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25 Date Performed: 10/15/03 Abstract: The objective of this experiment is to efficiently perform a fischer esterification of 1-Hexanol to form water and hexyl acetate‚ and to confirm the esterification with a nuclear magnetic resonance (NMR) spectroscopy. It was found that 0.3963 grams hexyl acetate was formed with a percent yield of 33.2%. The product was confirmed using NMR‚ IR‚ and boiling point confirmation. Backround: A Fischer Esterification is the formation of an ester and water from alcohol
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com/ChemHNHS%20Website/.../CHEM12_C0500_LABT.pdf In this experiment‚ you will perform the flame tests used to identify ... In this lab‚ the solutions you will be using contain harmful materials. Avoid skin contact with ... Spectroscopy Lab www.trschools.com/.../weblabs/spectrolab.h... Toms
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reaction using a phosphorus-containing Hornes-Emmons-Wittig reagent to generate an enolate anion of trimethyl phosphonoacetate instead of a phosphorus ylide. The methyl trans-4-methoxy cinnamate produced is then analyzed using melting point and 1H NMR spectroscopy. Theory The Wittig reaction prepares alkenes from carbonyl compounds by attacking a phosphorus ylide with a nucleophilic carbon atom stabilized by a triphenylphosphonium group. An ylide is a compound that contains two oppositely charged atoms
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Identification of Unknown Organic Compounds by Melting Point‚ Boiling Point‚ and Infrared Spectroscopy Methods and Background The goal of this laboratory experiment was to determine the structure and identity of an unknown solid and an unknown liquid by using elemental analysis‚ index of hydrogen deficiency‚ infrared spectroscopy‚ melting point (for solid)‚ and boiling point (for liquid). In this laboratory‚ we were given unknown solid “C” and unknown liquid “D”. The empirical formula
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yield of the pyrrolidine enamine. This condition was leaded good yields (73.6%) without side reactions. Acylation gave an enol form (71.7%) and a keto form (28.3%) of 2-acetylcyclohexanone mixture‚ the composition of which was determined by 1H-NMR spectroscopy. Key words : pyrrolidine‚ enamine‚ mild condition‚ NMR 1. Introduction The formation reactions of carbon-carbon bonds are important in organic synthesis [1-5]. In general‚ acylation reaction is one of the important carbon-carbon forming reactions
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strength for each functional group. As for second method‚ we are using the Spartan modeling software‚ where we are able to draw out each of the functional group and have the software calculate the theoretical bond strength for us. And lastly‚ the IR spectroscopy are used is this experiment to measure the bond strength of each compound‚ and all the significant data are being collected in our lab notebook in order to further compare with theoretical bond strength. IR spectrophotometer reads off the amount
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getting low in volume. Table 1.2: Recovery of organic material Object being weighed Weight in grams Weight of empty‚ clean test tube 6.446 g Weight of clean test tube with spearmint oil 6.635 g Weight of spearmint oil 0.189 g Table 1.3: IR Spectroscopy Frequency Corresponding Functional Group 3083.81 C-H 2923.91 C-H 1674.33 C=O Conclusion In this experiment‚ the process of steam distillation was used to purify a natural product‚ (the essential oil of spearmint). This phenomenon works
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characterization of the examined wall paintings was carried out by means of optical microscopy (OM)‚ scanning electron microscopy (SEM) equipped with an energy dispersive X-ray detector (EDS)‚ X-ray diffraction analysis (XRD)‚ Fourier transform infrared spectroscopy (FT–IR) and the colorimetric characterization. The results revealed the characterization of the stratigraphic structure of wall decorations of the tomb and their chemical composition. The obtained results helped in identifying the chromatic palette
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