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Determination of Phosphorus in Cola Drinks
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Abstract
Laboratory experiments can improve student interest in science. However, the contrary effect could occur if they are not well designed and seem tedious, too laborious, and disconnected from daily life.
Cola beverages are one of the most widely consumed drinks and are most popular among students. Much attention is being paid to possible consequences of excessive consumption for human health. Intensive efforts are being made to assess the erosive potential for teeth because of the beverages' acidity (1, 2); adverse effects secondary to high caffeine intake (e.g., hypertension, allergic reactions, gastrointestinal disturbances) (3 - 5); and adverse effects on calcium metabolism due to their high phosphoric acid content, which combined with low dietary calcium intake could increase the risk of suffering from bone diseases (6 - 9).
We propose here the quantification of the phosphorus content in this kind of drinks by a different procedure from that previously described by Murphy in this Journal (10). We think this laboratory experiment will seem very interesting to students.
See Letter re: theis article.
Keywords (Audience):
Second-Year UndergraduateKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
PhosphorusCiting Articles
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This article has been cited by 3 ACS Journal articles (3 most recent appear below).
How Much Cranberry Juice Is in Cranberry–Apple Juice? A General Chemistry Spectrophotometric Experiment
Etinosa Edionwe, John R. Villarreal, and K. Christopher SmithJournal of Chemical Education2011 Article ASAPHow Much Cranberry Juice Is in Cranberry–Apple Juice? A General Chemistry Spectrophotometric Experiment
Etinosa Edionwe, John R. Villarreal, and K. Christopher SmithJournal of Chemical Education2011 Article ASAPA laboratory experiment that spectrophotometrically determines the percent of cranberry juice in cranberry–apple juice is described. The experiment involves recording an absorption spectrum of cranberry juice to determine the wavelength of maximum ...
Analysis of Phosphoric Acid Content in Popular Carbonated Drinks
Jessie Rodgers and Marina KoetherJournal of Chemical Education2005 82 (10), 1471Analysis of Phosphoric Acid Content in Popular Carbonated Drinks
Jessie Rodgers and Marina KoetherJournal of Chemical Education2005 82 (10), 1471By studying a number of soft drinks with color but with or without phosphoric acid, the authors have determined that the required 20-fold dilution required in the “Determination of Phosphorus in Cola Drinks” is not to dilute the color but merely to place ...
Bridging Native American Culture and Chemistry: Gas Chromatography Experiments That Examine Native Foods
Gerald Caple , Andrew G. SykesJournal of Chemical Education1999 76 (3), 392Bridging Native American Culture and Chemistry: Gas Chromatography Experiments That Examine Native Foods
Gerald Caple , Andrew G. SykesJournal of Chemical Education1999 76 (3), 392This article describes three chemistry experiments that link common foodstuffs traditionally and currently harvested by Native Americans in different parts of North America to modern chemical instrumentation and discovery methods. Methods of isolation ...
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- Received: August 03, 2009
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