1 Problem
The goal of this research project is to know the content of Vitamin C in different brands of mango juice and test whether there is difference in the levels of the vitamin contained in the different brands. The hypothesis for this work is that different brands of mango juice contain similar levels of vitamin C.
2 Acknowledgment
I would like to express my heartfelt gratitude to my subject teacher without whose guidance and advice I would have not done this research. I also thank the entire library and laboratory staff, as well as to my peers and friends for their emotional support. Thank you all.
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"Do Different Brands Of Mango Juice Contain Different Levels Of Vitamin C?".
3 Review of Literature
Drinking juice is considered one of the best ways to up vitamin C intake in human beings. Humans need plenty of vitamin C to regulate body enzymes and metabolic processes and boost their immunity and health (Walker, 2015). While vitamin C, also known as ascorbic acid, can be found in many fruits, mango is one of the most popular fruits that also pack a high concentration of this vitamin (Gardner, Barbara & Tocci, 2010). There are a variety of mango juice types and brands available for human consumption. Different brands of mango juice are claimed to contain different levels of vitamin C (Walker, 2015). Previous studies and experiments have demonstrated that each brand of mango juice contains different amounts of vitamin C (Walker & Wood, 2010).
4 Materials and Methods of Procedure
4.1 Materials
The materials needed for this research project were pipette; beakers (different ml sizes), stirring rod, a scale, distilled water, glass bowl, Tincture of Iodine, and corn starch. The different brands of mango juice included Minute Maid (Sample A), Freshly Squeezed (Sample B), Tropicana (Sample C), Florida’s Natural (Sample D), Langers Juice (Sample E) and Sunny D (Sample F).
4.2 Procedure
First, a Vitamin C indicator solution was prepared. This was done using the corn starch and iodine. 2 grams of corn starch was mixed in 200ml cold distilled water and boiled in a glass bowl. 8 ml of this boiled solution was then added to 1ml tincture of Iodine and poured into a beaker containing one liter of water. The starch turned to blue in color. Second, 15ml of this vitamin C indicator was then poured into an empty 50ml beaker (Gardner, Barbara & Tocci, 2010).
Third, using a clean pipette, one drop of mango juice (sample A) was dropped to the starch indicator stir using the stirring rod. Sample A was added drop by drop into the vitamin C indicator while still stirring and swirling until it became colorless. An observation was made and recorded. The test was done three times for sample A. The same procedures were done for samples B, C, D, E and F. For each of the samples, the average number of drops it took to change from blue to colorless the color of the vitamin C indicators was recorded (Gardner, Barbara & Tocci, 2010).
5 Results
From the observations made, it was recorded that Sample A changed the vitamin C indicator solution with an average of 9.6 drops; Sample B 5.6 drops; Sample C 10.9 drops; Sample D 11.6 drops; Sample E 2.4 drops; and Sample F 9.9 drops. The different averages indicated that the amounts of Vitamin C in different brands of juice are not the same. The sample with the lowest average number of drops (in this case Sample E) contained the highest amount of vitamin C while the sample with the highest average number of drops (Sample D) contained the lowest amount of vitamin C.
6 Conclusion
The research project was conducted to attain answers to the problem statement ‘Do different brands of mango juices contain different level of vitamin C? To achieve this, the research aimed at determining the content of vitamin C (ascorbic acid) in different brands of mango juices. Results obtained from the test were recorded and tabulated and a conclusion made for the results. From the observations made, it was found that different brands of mango juice do not contain the same content of vitamin C. Therefore, the hypothesis that different brands of mango juice contain similar levels of vitamin C was incorrect.
