ipl-logo

Dichloromethane Lab Report

1278 Words6 Pages

BS1003 – Organic Chemistry Practical 1 Laboratory Report Name: Tristan Chan Yew Kit, U1640436J (T8) Effects of Dichloromethane(DCM) in Extraction of Caffeine from Tea Leaves Purpose To investigate the ability for Dichloromethane(DCM), a moderately polar organic solvent, to extract aqueous caffeine molecules, originating from Tea Leaves suspended in water. Introduction Caffeine, defined chemically as 1,3,7-trimethylxanthine (C8H10N4O2), is an alkaloid that can be found in tea leaves, coffee and many other plant species. The amount of caffeine in dry tea leaves varies from 2-5% between different species of plants. Caffeine has uses in the medicinal industry, with the ability to act as a vasodilator, diuretic, and aid in stimulation of the central …show more content…

Reflux condensation was performed with use of a heating mantle and retort stand. A total of 20 minutes was allocated for reflux, starting when the mixture first began signs of boiling(T0), to when the allocation of time was depleted(T20). The mixture was filtered into a 50mL conical flask, and 10mL of 100°C water. The extract was subsequently allowed to cool to room temperature, and decanted into a separating funnel. Liquid-Liquid (Polar-Nonpolar) extraction of DCM In a fume hood, 8.0mL of DCM was added to the separating funnel, capped and gently mixed. The cap was released periodically to prevent build-up of pressure within the funnel. The immiscible liquids were allowed to separate. Emulsions formed within the funnel were gently removed with use of a thin glass rod. DCM in the lower layer was drained into a clean and dry 50mL conical flask. The entire process was repeated twice …show more content…

Further purification steps post extraction could be carried out to further increase the purity of caffeine. For example, crude caffeine could be washed again with DCM and recrystallized to further remove any impurities, which was not included in this experiment. This method of extracting caffeine ultimately produces less than ideal quantities and qualities of caffeine, and hence can be optimized to obtain purer caffeine in higher yields. The experimental design was to demonstrate the ability for DCM to extract caffeine, which supports the original hypothesis. References [1] " Caffeine Extraction From Green Tea Leaves Assisted By High Pressure Processing ". Sciencedirect.com. N. p., 2016. Web. 10 Sept. 2016. [2] "TOXNET". Toxnet.nlm.nih.gov. N. p., 2016. Web. 10 Sept. 2016. [3] Tadelech Atomssa and A.V. Gholap. "Characterization of caffeine and determination of caffeine in tea leaves using uv-visible spectrometer." African Journal of Pure and Applied Chemistry 5.1 (2011): 1-8. [4] O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p.

Show More
Related
622 Words | 3 Pages

In “Java Man,” Malcolm Gladwell insists upon the importance and reliance that humans have on caffeine, and he states that “there is no drug quite as effortlessly adaptable as caffeine” (248). He highlights the significance of caffeine by revealing the history and using claims from popular advertisements such as Coca-Cola, historical figures like Paul Erdös, and scientific facts of how caffeine effectively works in humans’ bodies. Not only does Gladwell shares historical context, he also conveys a humorous tone and uses compelling evidence. By showing the significance of caffeine, Gladwell dates back to the eighteenth century to show how caffeine has affected people throughout history. First, the author uses a Coca-Cola advertisement from the

Read More
144 Words | 1 Pages

This can characterize the caffeine extracted from the tealeaves

Read More
426 Words | 2 Pages

Caffeine present in the cup of coffee has a direct impact on the release of Ca2+ from the sarcoplasmic reticulum. A daily dose of caffeine increases the Ca2+ concentration in the sarcoplasmic reticulum to a certain extent, which in turn strengthens the contraction of the heart muscle (Klein et al., 1990). This allows the heart to do the same amount of work without working as hard as it usually

Read More
507 Words | 3 Pages

For the purposes of this lab, only three other chemical constituents of tea were considered during the chemical extraction of caffeine from tea. These chemicals were cellulose, tannins, and chlorophyll. Of course, there are many other chemicals in black tea, including various lipids and carboxylic acids ; however, many of these chemicals are not present in large enough quantities to separate using the methods available to an undergraduate lab, and therefore these chemicals are collectively considered as impurities. Therefore, the procedure and concepts behind the separation of the three aforementioned chemicals, as well as caffeine, from tea will herein be discussed. Cellulose is largely insoluble in water, and only goes into solution at temperatures and pressures much higher than those encountered in boiling tea.

Read More
592 Words | 3 Pages

It is absorbed through the stomach and reaches the highest level in the bloodstream after one or two hours. Caffeine reaches the brain quickly and acts as a stimulant for the nervous system. The most noticeable effect of caffeine is alertness. It causes us to feel less tired, so it is a main ingredient in medicines designed to prevent exhaustion.

Read More
1600 Words | 7 Pages

“Caffeine can help athletes perform better at endurance exercises of short and long durations.” It also reduces muscle pain and weariness. Vitamin B2, vitamin B5, manganese, potassium, magnesium, and niacin are needed nutritious substance, and coffee is a source to supply these substances. Coffee is also the largest source of antioxidants, an excellent weapon, which can fight against the harming effects impact of the sun light and delay appearance of wrinkles. Moreover, coffee consumers are surely very happy to know that they acquire an amount of antioxidants from coffee which is larger than combining both fruits and vegetable.

Read More
326 Words | 2 Pages

Hello ladies and gentlemen, My name is Abdulla and I am going to present the benefits of using energy drinks. With today’s tiring pace of life some people feel the need for a boost of energy to accomplish their tasks and get through the day. The caffeine in coffee may provide this jolt of energy, but it takes time to brew a cup of coffee. It is faster and easier to grab an energy drink to get a quick shot of energy.

Read More
826 Words | 4 Pages

The reason why I chose this topic and question because from previous knowledge I knew that caffeine gives energy to your body, I decided to see how it enhances athletic performance. Caffeine has been shown and proven to enhance athletic performance. It enhances endurance for long distance runners and decreases muscle fatigue. Not only does caffeine have an effect on physical aspect it also effects mental energy. Caffeine improves alertness and also strengthens muscles.

Read More
1418 Words | 6 Pages

Caffeine is a chemical found naturally in few plants all over the world. From these plants it is processed into its pure form and then put into other things such as soda, energy drinks, tea, and pills. Energy drinks and soda are some of the most widely marketed products in the world, even though they contain the highest concentration of caffeine outside of pure caffeine supplements. It is a stimulant that affects everyone in strange but semi predictable ways. Research has been done on this topic since the 1920’s and many different conclusions have been reached.

Read More
2015 Words | 9 Pages

It is a central nervous system stimulant belong to the methylxanthine class. Caffeine can be derived from xanthine as a stimulant, xanthine is a purine base found in most human body tissues, fluids and in other organisms. I want to know at what temperature the tea solution contains certain amount of caffeine because my family likes to drink tea and

Read More
865 Words | 4 Pages

1. In the article One Life, “Scientists have identified approximately one thousand antioxidants in unprocessed coffee beans, and hundreds more develop during the roasting process” (Jong, 2014). 2. Antioxidants help fight inflammation and protect our cells from harmful damage.

Read More
2237 Words | 9 Pages

WebMD (2016) reported that caffeine is effective in headache-related ailments, such as migraine-induced headache, post-surgery pain and tension-induced headache, but with conjoint drugs as well to increase the efficiency. As caffeine is known as central nervous system stimulant, it helps people to stay awake and prevent sleepiness, thus caffeine is also combined with antihistamines to counteract the effect of drowsiness rendered by antihistamines. Besides, in low doses, caffeine is used for treatment of breathing problems in

Read More
1307 Words | 6 Pages

The scientists have proved that the green coffee is packed with vital elements that are extremely helpful to the mankind. The green coffee is effective in reducing the problem of obesity, which is a major concern to our health , as it can cause metabolic breakdown and results in many diseases of metabolic origin as if Diabetes Mellitus. However, the chemical compounds in the green coffee effectively control and eliminate the threat of obesity by working on our body to effectively reduce the fat in our body. In addition, the compounds of the green coffee effectively acting on our body to act on each cell of our body and balance all of the imbalances in our

Read More
1013 Words | 5 Pages

Caffeine is a substance that is found not only in coffee, but other beverages and foods like tea, energy drinks, chocolate, and in various seeds, fruits and leaves of plants. Although studies have found that coffee and tea have many chemical components with beneficial effects, one of these components, caffeine has earned a bad reputation with some people because of its stimulant effects. Some people crave it, while others avoid it. There are many reasons for people to love or hate caffeine, but not many people know the truth about it.

Read More
969 Words | 4 Pages

Nowadays, coffee is one of the most popular non-alcoholic consumed drinks worldwide. Only several Americans know the truth about the influence of this beverage on human health: coffee can be a healing drink reducing the risk of serious diseases because of antioxidants or harmful damage leading to irreversible consequences because of the alkaloids. The major component of coffee is caffeine. It is an alkaloid which stimulates the central nervous system (“Caffeine”).

Read More

More about Dichloromethane Lab Report

Open Document