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The research is about four different orange juices. The hypothesis is that the homemade orange juice will contain the most vitamin C and that the Fanta contains the least.

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Introduction

Battle of the juices Koff de, M. & Leeuwen van, L. Christelijk Lyceum Delft, The Netherlands Received march 2009 Summary Vitamin C is a very important vitamin, however humans, human apes, bats and guinea-pigs are the only creatures that cannot make their own vitamin C. People need every day around 70 mg vitamin C. This means we have to consume food or drink which contains vitamin C. This vitamin has a lot of positive effects. Because of the importance of this vitamin we are going to research which orange juice is the most healthiest. The research is about four different orange juices. The hypothesis is that the homemade orange juice will contain the most vitamin C and that the Fanta contains the least. The Appelsientje costs more and has a better reputation, that is why we think that this juice contains more vitamin C than the Surango. With a buret, the indicator acetic acid and DCPIP-solution you can demonstrate the percentage vitamin C. When more DCPIP-solution is used it means the juice contains more vitamin C. All the DCPIP-solution reacts with all the vitamin C. When all the DCPIP-solution has reacted with the vitamin C, the juice becomes red. __________________________________________________________________ Introduction The chemical name of vitamin C is Ascorbic Acid, C6H8O6. ...read more.

Middle

The E-number is E300. Figure 2: Vitamin C under the microscope Juices mostly have added vitamin C, but some juices contain only real fruit juice. Which of them contains more vitamin C? This is the research question; Which juice contains more vitamin C, homemade orange juice, Appelsientje, fanta or Surango? Our hypothesis is that the homemade orange juice will contain the most vitamin C and that the Fanta contains the least. The Appelsientje costs more and has a better reputation, that is why we think that this juice contains more vitamin C than the Surango. Experimental procedure and approach For a perfect measurement a buret is used. 90mL distilled water and 10mL acetic acid are used to make a diluted acetic acid solution. For the inquire 2mL diluted acetic acid is mixed with 2mL juice. This solution is used for the inquire. The DCPIP-solution was poured into the buret. Then a beaker is filled with 2 mL orange juice and 2 mL acetic acid. Carefully the DCPIP-solution is dripped into the beaker. The dripping is stopped when the colour of the concoction changes into red. After that the used amount of DCPIP-solution is read from the buret. This was repeated four times with different juices. The first time with homemade orange juice, then with Surango, next Appelsientje and the last time with Sinas. ...read more.

Conclusion

The Appelsientje contains less vitamin C than the Surango. The Fanta contains the least vitamin C. These results do not entirely support the hypothesis that the Surango contains less vitamin C than the Appelsientje. The hypothesis does support the fact that the orange juice contains the most and the Fanta contains the least percentage of vitamin C. The hypothesis is based on the reputation and price of the juices. The results show the opposite. The Surango does not show the ingredients on the package and it was very cheap. The Appelsientje did show their ingredients on the package, and also placed an announcement on it that the juice contains pure orange juice and extra vitamin C, it is also more expensive than the Surango. The Fanta does not have the reputation of a healthy orange drink, it is a soft drink. The expectation that the Fanta contains the least vitamin C was therefore right. The titrations were done twice for each juice. The difference between the first and the second time with the Fanta, the Appelsientje and the Surango was very close. However, the difference between the first and the second time with the homemade orange juice did deviate. The difference might be because of the fact that two different oranges were used, and those two oranges contained different amounts of vitamin C. For an as accurate as possible measurement, only one orange must be used. Bibliographie 1. http://www.vitamine-info.nl/vitamine_c 2. http://www.vitamins.nl/vitamine.C.htm 3. http://www.natuurlijkerwijs.com/vitaminen.htm 4. http://www.bioplek.org/techniekkaartenbovenbouw/techniek79vitaminec.html ...read more.

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