Chemistry 100 Experiment #2: Chromatography of Food Dyes Name: Cassandra DeVaux Date: April 17‚ 2014 Purpose: To learn how mixtures of compounds can be separated and what food dyes are found in certain foods Introduction: In this exercise we will separate food dyes from a variety of sources. We will first gather data on known dyes where we know how many substances make up the dye. Then we will collect data on some samples where we do not know the make-up. We will compare our
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Candy Chromatography By: Avani Reddy 7th Grade Introduction Ever wondered why candies are different colors? Ever wondered why candies are different colors? Many candies contain colored dyes. Bags of M&Ms or Skittles contain candies of various colors. The labels tell us the names of the dyes used in the candies. But which dyes are used in which candies? We can answer this by dissolving the dyes out of the candies and separating them using a method called chromatography. Research
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Column and thin layer chromatography of plant pigments CHEMISTRY 201L EXPT 04 PAGE 01 - 12 Noel Angelo P. Kalacas*‚ Hanna Mae Laluces‚ Ina Bianca Lanuza Department of Chemistry‚ College of Science *Corresponding author; e-mail: knight_BeNcH66@yahoo.com Abstract Chromatography is a powerful technique for separating and/or identifying the components in a mixture. There are different types of chromatography and each has its own strengths and weaknesses. In this experiment‚ pigments of the
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PAPER AND THIN-LAYER CHROMATOGRAPHY Lab 47 Michael Stravino‚ CHM 2211L‚ June 3‚ 2012 Abstract Thin-Layer Chromatography and Paper Chromatography can be used to identify identical compounds‚ unknown compounds‚ the number of components in a mixture‚ as well as other important uses not explored in this laboratory. This experiment explores these techniques to identify an unknown amino acid by TLC and analyze food colors using paper chromatography. By using 2.0 mL of dimethoxyethane and 18 mL of
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Post Lab Report Experiment 3 - Chromatography – Analyzing Analgesics by TLC and Isolation of β–Carotene by Column Chromatography Chemicals 1. Acetaminophen (C8H9NO2) 2. Aspirin (C9H8O4) 3. Caffeine (C8H10N4O2) 4. Ibuprofen (C13hH18O2) Introduction In this experiment‚ several analgesics were analyzed by Thin Layer Chromatography (TLC) and the composition of an unknown tablet was identified. We define chromatography as the separation of two or more compounds or ions by
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with either 85% phosphoric acid or concentrated sulfuric acid [1]. The objective of this experiment is to dehydrate 3-methyl-3-pentanol to obtain the product mixture of isomeric alkenes 3-methyl-2pentene and 2-ethyl-1-butene. Then use the gas chromatography to separate the product mixture and analyze the composition [2]. [pic] [pic] [pic] Figure1: Table of Reagents |Name |Molecular Weight |Density |Melting Point
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Chromatography of Commercial Analgesics Chromatography of Commercial Analgesics CHEMISTRY 200L EXPT 4 PAGE 8 - 11 CHEMISTRY 200L EXPT 4 PAGE 8 - 11 Janna Vernice R. Villalon*‚ Christian V. Villanueva‚ Cyd Vincent L. Zamora Department of Chemistry‚ College of Science *Corresponding author; e-mail: janna.villalon@rocketmail.com Abstract In analyzing the chromatography of analgesics‚ thin layer chromatography (TLC) was used. A very thin (micron) film of silica is coated on a glass
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of 95% ethanol producing long red needles. 0.536g‚ 2.07mmol‚ 158-160°C (160°C lit3)‚ 54.6% recovery. Thin layer chromatography was performed in three different eluents‚ hexane‚ toluene‚ and acetone. The chromatography compared aniline‚ 2‚ 4-dinitrobromobenzene‚ and a sample from the mixture of the two reactants when the reaction first began to take place. Another thin layer chromatography used a product sample an hour after the reaction first began and the eluent that showed the best separation of
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IDENTIFICATION OF UNKNOWNS BY TLC AND MP IN COMBINATION Introduction: Thin layer chromatography (TLC) is one of the most valuable techniques in organic chemistry. This is a best method of separating and identifying mixtures of two or more compounds. The separation is accomplished by the distribution of the mixture between two phases: one that is stationary and one that is moving or mobile. Chromatography works on the principle that different compounds will have different solubilities and adsorption
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Performed on: Wednesday‚ May 8th‚ 2013 | | | 5/15/2013 | | Introduction: The goal of this experiment was to identify an unknown analgesic drug through the use of thin-layer chromatography. The drugs used were‚ Unknown #1‚ caffeine‚ aspirin‚ and acetaminophen. Thin-Layer Chromatography is a technique for identifying substances using a mobile phase (developing solvent) that draws up through a stationary phase (TLC plate) and marks spots of differing distances for differing substances
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