Extraction Of Chocolate Lab Report

Title of Experiment: Extraction of Chocolate

Name: Dylan Murphy

Class: DT420/3

Student Number: C12522373

Lecturer: Julie Dunne

Date of Submission: 5/12/2014

Laboratory Report Check List

1. Include a title sheet with your name, and date X

2. Listen to Audio Feedback summary for lab report X

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The soxhlet apparatus is a piece of glass wear that is used for the extraction and distillation process. The extraction process, like any other is the technique that is used to separate or isolate a species from a mixture of compounds or impurities [2]. Distillation is the separation of component substances by selective vaporization and condensing. The soxhlet apparatus does both these at once by constantly evaporating, condensing and collecting in the Soxhlet glass chamber, all to be re-used several times. This is the basic principle behind the soxhlet apparatus. There are a few things taken into effect when it comes to this apparatus though, an example of this is the use of tinfoil around the side arm and the top of the round bottom flask this insulates the glass and prevents condensation in the soxhlet fitting [3]. The principle that can be taken into effect are the solubility properties, the term “like dissolves like” comes into play. If the sample in the round-bottom flask in the soxhlet apparatus is organic then the solvent circling must be organic for the sample to dissolve in one another. The term “lipid” refers to a group of compounds that are soluble in water, but show variable solubility in a number of organic solvents [4]. This is what is used in the experiment today so a non-polar solvent such as hexane and petroleum ether can be used to dissolve the

Microwave assissted extraction is a process of heating a solvent that has contant with a sample with microwave energy to partition compounds of analytical intrest. The main idea behind the microwave assissted extraction is the rapid sample preparation technique that allows extraction with reduced amounts of common laboratory solvents in closed vessels with elevated temperatures and controlling of temperature in the extraction process.[6] This particular methods allows the analyst to quickly accomplish multiple quantititative sample extractions within minutes. The process is the partionong of the compounds of interest from a sample matrix into a solvent. The kinetics are driven by the evelvated temperatures and choice of solvents. Using closed vessells that contain sample and solvent, the vessells can be heated dirrectly, which can extend solvent extraction. As seen in figure 1.1 there is a skematic diagram to show what the mircowave assissted extraction machine looks like and all the various parts