2. Attention Soft Drink Consumers! Is Phosphorous in Your Beverages Endangering Your Health?

3. Health Hazards of Soda  High sugar content  High caffeine content  Phosphoric acid content

4. So, What’s the Big Deal?  Main Objectives  find out how much phosphorous in Coca- Cola products  Does phosphoric acid contained in soft drinks increase chances of developing bone disease?

5. Why Is It Added Then? FAccording to a Coca-Cola Company Representative FAdds tartness FAdds acidity FSafe to drink FContained in most foods

6. Content of Some Foods 8 oz Coca-cola classic 41mg 10oz Cheddar Cheese145mg 1 Large Egg 90mg (Given by representative named “Kim” over the telephone)

7. Importance of phosphorous present in all living cells strong bones and teeth enzyme activity buffer in blood Reference: (http://sanangelo.tamu.edu/mg/p.htm)

8. Experimental Method PMolydenum phosphate complex 7H 3 PO 4 + 12 (NH 4 ) 6 Mo 7 O 2 *4H 2 O  7(NH 4 ) 3 [PO 4 (MoO 3 ) 12 ] + 51NH 4 + + 51OH - + 33H 2 O PReduced by ascorbic acid PSpectrophotometrically active-blue

9. The Quant Part Calculations –calibration curve –least squares –ppm of Phosphorous in sample = 20*20*XppmP 2 O 5 *(75mgP/142mgP 2 O) where Xppm = solve for x in least squares equation.

10. Results Sample Absorbance Sprite0.006 Coca-Cola0.573 ____________________ Sprite - about 0 Coca-Cola = 137ppm = 137mg/L which equals about 32mg in 8ozvs lit. value of 41mg/80z Literature: 17 mg (amt. in 100 grams)

11. Conclusion cSprite contains less than Coke cChanges to Journal of Chemical Education procedure cWrap up of information cReferences www.sanangelo.tamu.edu/mg/p.html www.thecoca-colacompany.com www.solopro.com/phosnew.html