Caffeine Lab Report

According to the results, the columns of caffeine in figure 1, of this experiment the hypothesis for caffeine is partially accepted. There is an increasing trend in the change of pulsation rates with increasing

There were also several limitations within the experiment. Since this experiment looked into the effects of green tea and black tea, which contains caffeine, observation of varying plant defensive compounds other than the caffeine in tea can widen the extent of the results and improve the experiment. For instance, observing the effects of chamomile tea, which has a little to no level of

Caffeine is a mild stimulant that occurs naturally in at least 63 plant species. Caffeine can be found in the leaves, stems, seeds, and roots of these various plants. Caffeine is part of the methylxanthine family. It consists of a xanthine molecule with three methyl groups attached to it. Caffeine can be found in many products like sodas, tea, and coffee, but it also occurs in several other products such as prescription medications, diuretics, and pain relievers. Caffeine’s widespread use and popularity have caused many people to view the substance as an addictive drug. Thus making caffeine the most inexpensive and readily available drug known to man. Then on the other hand there are

Components containing caffeine were composed into stock solutions. These solutions were diluted to 1: 10 substance: mobile phase. A stock solution of caffeine was diluted 1:50. A sequence of diluted caffeine solutions were prepared for use as a standard (ppm): 1, 2, 4, and 10. Solutions of acetaminophen, acetylsalicylic acid, and Goody’s Powder were developed to differentiate chromatographic peaks observed. These solutions were subjected to HPLC for examination of the observed peak area and retention time for the set of compounds. Comparison of retention time allowed for the differentiation of peaks observed. The peak area obtained was utilized to determine the relative concentration of caffeine present in Goody’s Powder based on the relationship obtained in the standard. The content of caffeine present in Goody’s Powder by percent weight was identified.

Many manufactures release the caffeine content of their products publically, but not always, and new products and flavors are continuously introduced to the market. If quality checks are not performed, manufactures may alter the caffeine and benzoic acid content to suit the demands without public knowledge. To ensure the levels of caffeine and benzoic acid in products do not exceed the established safe limits and to inform the public of the amount of these compounds being consumed, various methods of analysis have been performed. Before the introduction of modern techniques, spectrophotometric methods alone were used to determine concentration of a compound in a mixture.6 The caffeine content in coffee, tea, soft drink, and energy drinks were determined using an immunoassay.7 The caffeine content in mixtures also used to have to be extracted before quantification.8

(7)When data is complete, multiply number of each liquid by 2 to get the correct number of heartbeats per minute.

In this experiment, I was unable to complete the tests that would suggest isolation success. If the melting point of the experimental caffeine was tested, the experimental melting point would need to be 238o Celsius to be successfully isolated. A melting point lower than this would suggest that the isolate was impure. If a TLC plate was performed on the crude caffeine and the isolate, the crude would have multiple retention factor values while the isolate, if isolated successfully, should only have one retention factor. If an IR spectrum was performed, the spectrum should only show functional groups in caffeine such as amides and amines, and should not include functional groups like phenyls or esters.

Caffeine is a natural product that is extracted from the raw fruit of coffee plants over sixty creased alertness. Caffeine gives most people a temporary energy boost and elevates mood..species to be exact. kola nuts, cocoa, yerba maté, guarana berries, coffee beans and teas contain this. Caffeine is rapidly absorbed in about 30 to 60 minutes in our bodies after ingestion. Caffeine is defined as a drug because it stimulates the central nervous system, causing increased alertness. Caffeine gives most people a temporary energy boost and elevates mood.caffeine can also be in things like over the counter medications, and pain relievers.

Header Caffeine is a stimulant that can affect the body in many different ways. Aim The effects of caffeine on the human body (reaction time) Hypothesis Caffeine acts a central nervous stimulant which keeps the human body active for a certain amount of time. However, the negatives in consuming caffeine are severe.

In this experiment 10.0514 g of espresso yielded 1.1178 % of crude caffeine. The average data of caffeine from black tea with the average weight of 9.5195 g had a 3.60% yield of caffeine. The average data of coffee with the average weight of 9.5306 g had an average yield of 1.4875% crude caffeine. The average data of espresso with the average weight of 9.4636 g had an average yield of 4.19% crude caffeine. The green tea with a weight of 9.6489 g had a yield of 2.4022% crude caffeine. According to Caffeine Content, the average caffeine content of regular coffee is 13.5 mg per gram of coffee, which means the crude caffeine recovery yield would be 1.35% (Coffee's Caffeine). The caffeine informer sates that green tea has about 10-20 mg of caffeine per 1 gram of leaves meaning that it has recovery yield of about 1-2% crude caffeine, and black tea has about 22-28mg of caffeine per 1 gram dried matter giving a recovery yield of about 2.2% -2.8% (Caffeine informer).

The caffeine is extracted from the water at room temperature. The addition of an anhydrous basic salt would remove the water from the solution, and leave behind pure caffeine. Procedure Start by placing weighing two tea bags and recording in the report sheet. Add the two tea bags in a 250 mL Erlenmeyer flask. Add 60 mL of water inside the flask.

From coffee to tea, caffeine has become a prominent substance that people use to keep them alert and productive. Considering the number of people that consume more and more amounts of caffeine each day through different means, it has been integrated into daily lives as a part of a routine. However, many people do not comprehend what caffeine is actually doing to their bodies, and they just consume it for the energy boost it provides. Primarily used as a stimulant, caffeine has proven itself in the course of history as a beneficial component of daily routines, despite the fact that repercussions have become more prevalent in the past years surrounding the use of caffeine.

1,2,7-trimethylxanthine commonly known as caffeine is the best known N-compound due to its physiological effects on the central nerve system, blood circulation and respiration. Caffeine is the most widespread consumed behaviorally active substance and almost all the caffeine sources are dietary (Fredholm et al. 1999). The caffeine content of e.g. coffee differs depending on the Coffea variety and the content only decreases in small amounts during roasting (Belitz et al. 2009). In the US Coffee consumptions contributes to 71% of caffeine intake among adults (O'Keefe et al. 2013), however caffeine can also be found in tea, cacao, chocolate as well as sodas. It is found that most notable changes in the behavior occur after low to

Many of us find ourselves drinking a freshly brewed cup of coffee, an ice cold soft drink, a hot cup of tea, or an energy drink whether it be in the morning, afternoon, or in the night but one thing is that they all share a common ingredient: Caffeine

To first begin, one may test this claim by conducting their personal experiment. Going further more into this experiment measuring certain materials such as ground coffee beans and the amount of water used would be important to evaluate. These two materials are important to measure because one may need to know the amount of these materials would be needed in order for the experiment to occur. So, to measure the water and ground coffee beans, I would recommend to use measuring cups and jot down the amount of each material was used. Since the experiment regards to the levels of caffeine in the coffee beans, I believe it is important to consider the amount of water is used.