TLC Adulterated Spice Lab Report

TLC Adulterated Spice Lab Report - TLC Adulterated...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
TLC Adulterated Herb/Spice Lab Report Norbert Wang GSI: N. Stephanopoulos 105 Purpose:  To use TLC to identify the components in an adulterated herb/spice (one component  from the group’s known substances and another component from another group’s known  substances). Plate 4:  The Rf of adulterated sample 716 was tested in comparison with pure components 713,  714, and 715 in 4 solvent systems (24, B). Chromatography merely separates mixtures along a  plate in a definite pattern. If a component is a part of the adulterated sample, its TLC pattern  should be clearly visible within the TLC pattern of the adulterate. By comparing the pures with  the adulterate in each solvent system, 715 proved to be the best match (30, B). It is clear that  there is another component present in 716. From the laboratory procedure the component should  be a pure component from another group. On the blackboard was a table of all the Rf values for  pure components for each of solvent systems. Because 716 is composed of multiple spices, each  compound must have a consistent Rf value associated with a particular solvent. If a particular  compound had a Rf/solvent data set similar to our adulterated mixture, then it is likely to be one 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/05/2008 for the course CHEM 3AL taught by Professor Li during the Spring '08 term at Berkeley.

Page1 / 4

TLC Adulterated Spice Lab Report - TLC Adulterated...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online