PDF4PRO ⚡AMP

Modern search engine that looking for books and documents around the web

Example: biology

CHEM 344 Thin Layer Chromatography

CHEM 344 Thin Layer Chromatography Thin Layer Chromatography (TLC) is a useful technique for the separation and identification of compounds in mixtures. TLC is used routinely to follow the progress of reactions by monitoring the consumption of starting materials and the appearance of products. Commercial applications of TLC include the analysis of urine for evidence of "doping", the analysis of drugs to establish purity or identity of the components, and analysis of foods to determine the presence of contaminants such as pesticides. Introduction Thin Layer Chromatography (TLC) uses the same principles as extraction to accomplish the separation and purification of compounds: that is, the different separation of compounds between two phases based on differences in solubility of compounds in the two phases. In the case of TLC, one phase is a mobile liquid solvent phase and the other phase is a stationary solid phase with a high surface area.

consists of a volatile organic solvent or mixture of solvents. A solution of the sample containing a mixture of compounds is applied to the layer of adsorbent, near one edge, as a small spot. The TLC plate is propped vertically in a closed container (developing chamber), with the edge to which the spot was applied down. The solvent, which

Fullscreen Download

Tags:

  Organic, Volatile organic, Volatile

Information

Domain:

Source:

Link to this page:

Please notify us if you found a problem with this document:

Spam in document Broken preview Other abuse

Transcription of CHEM 344 Thin Layer Chromatography

Documents from same domain

Assigning the 1H-NMR Signals of Aromatic Ring 1H-atoms

www2.chem.wisc.edu

the signals in the aromatic region. 3) Model compound An often over-looked and under-utilized method of assigning the signals in the 1H-NMR region is by comparison to known molecules. Let us assume that the 1H-NMR spectrum of o-isopropylaniline is not available in any database. It is very similar to at least three common compounds (benzene,

  Compound, Aromatic

11 Grignard Reaction - Department of Chemistry

www2.chem.wisc.edu

14-1 14 Formation and reaction of a Grignard reagent 14.1 Introduction The study and use of compounds featuring carbon-metal bonds (organometallic chemistry) is a major area of synthetic chemistry. Metal atoms are less electronegative than carbon and

  Reactions

Chemical Shift Table - Department of Chemistry

www2.chem.wisc.edu

Title: Chemical Shift Table.xls Author: Matt Bowman Created Date: 8/11/2008 3:03:38 PM

  Shifts

13 C Chemical Shift Table - Department of Chemistry

www2.chem.wisc.edu

Alkanes Alkynes Amines Alkyl bromides Alkyl chlorides Alkyl fluorides CDCl 3 C R R C O R R R R C R O R C O O R C R R R R C R R R R C R R Cl R C R R Br R C R R F R C N R R R R RCR Nitriles RCN R=sp3CorH C represents carbon of interest. Title: 13 C Chemical Shift Table.xls Author: Matt Bowman Created Date:

  Alkanes

Practice Problems on SN1, SN2, E1 & E2 - Answers

www2.chem.wisc.edu

Practice Problems on S N1, S N2, E1 & E2 - Answers 1. Describe the following chemical reactions as S N1, S N2, E1 & E 2. Draw a curved arrow mechanism for each reaction. NaI 3 3 Cl KCN DMSO CN Br NaOH H2O, heat BrH 2O OH I CH3CH2O-Na+ ethanol HI NaSH DMSO HSH Br HO KOH DMSO OTs NaNH2 NH3 TsO NH3 H2N O O CH CH3 TsO

  Practices, Chemical, Problem, Reactions, Chemical reactions, Practice problems

MestreNova Quick Guide - Department of Chemistry

www2.chem.wisc.edu

different thresholds for parts of the spectrum. If you would like a report for publication of these peaks, click on Report Peaks , which will add a peak list to your spectrum. ... MNova will load data a stackas plot. (This is great if your phasing is the same for each spectrum but it usually isn’t due to slight changes in

  Load, Thresholds

A Tutorial for Chemists: Using Mnova to Process, Analyze ...

www2.chem.wisc.edu

when Mnova is installed. So is the .mol file. You can find them in a folder similar to the following: C:\Program Files (x86)\Mestrelab Research S.L\MestReNova\examples\datasets These data are used in many of the examples shown in this tutorial. When you use your own data, make sure you copy all the files in the folder of an experiment.

  Folder

CHEM 344 Distillation of liquid mixtures

www2.chem.wisc.edu

The thermometer bulb should be completely surrounded by the vapor. ... Note that the boiling point of the collected material is actually a range rather than a single point. 4 2. Distillation of Mixtures ... it is possible to obtain the lower boiling substance with …

  Thermometer, Actually, Is actually

Introduction to 13C-NMR Spectroscopy - Department of …

www2.chem.wisc.edu

Introduction to 13C-NMR Spectroscopy Main topics-13C-atom chemical shift range-1H-coupled and decoupled 13C-NMR spectra 1. 6.00 5.94 TMS 1H-NMR Spectrum of n-pentane 2 three 1H-atom environments. 8.00 6.00 1H-NMR Spectrum of …

  Introduction

Related documents

Indoor Air Quality Guidelines for selected Volatile ...

assets.publishing.service.gov.uk

Volatile organic compound (VOC) is the organic compound eluting between and including n-hexane and n-hexadecane on the gas chromatographic column, as specified in the Standard. Semi-volatile organic compound (SVOC) is the organic compound which elute after n-hexadecane, on the gas chromatographic column, as specified in the Standard. Total ...

  Compound, Organic, Volatile, Volatile organic compounds, Organic compounds

METHOD 8260B VOLATILE ORGANIC COMPOUNDS BY GAS ...

19january2017snapshot.epa.gov

VOLATILE ORGANIC COMPOUNDS BY GAS CHROMATOGRAPHY/ MASS SPECTROMETRY (GC/MS) 1.0 SCOPE AND APPLICATION 1.1 Method 8260 is used to determine volatile organic compounds in a variety of solid waste matrices. Thi s method is applicable to nearly all types of samples, regardless of water content ,

  Organic, Volatile organic, Volatile, 2068

Methyl Ethyl Ketone - Shell

www.shell.com

Volatile Organic Compound (VOC) g/l EU / EPA 805 Flash Point (Abel) °C IP 170 -6 Auto Ignition Temperature °C ASTM E659 515 Lower Explosion Limit %v/v - 1.8 Upper Explosion Limit %v/v - 11.5 Electrical Conductivity at 20°C pS/m ASTM D4308 2*107 Dielectric Constant at 20°C - - 18.5 Freezing Point °C - -86

  Compound, Shell, Organic, Volatile, Volatile organic compounds

Acid-Base Extraction

people.chem.umass.edu

organic solvent must also be volatile (easily-evaporated) so it can be easily removed by evaporation at ... acid), and a neutral compound will be separated by acid-base extractions. The separated compounds will be purified by recrystallization and identified by melting points. A general scheme for the separation is given below.

  Base, Compound, Acid, Organic, Volatile, Acid base

Chromatography

www.soinc.org

ions and organic compounds in solutions. It uses liquids which may incorporate hydrophilic, insoluble molecules. Gas Chromatography detect bombs in airports, identify and quantify such drugs as alcohol, used in forensics to compare fibers found on a victim Used to analyze volatile gases. Helium is used to move the gaseous mixture through a

  Organic, Volatile

Related search queries

Volatile, Volatile Organic Compound, Organic compound, Volatile organic, 8260, Shell, Acid-base, Organic, Compound