# Attention Soft Drink Consumers_ by shuifanglj

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```									Attention Soft Drink
Consumers!
Is Phosphorous in Your
Beverages Endangering Your
Health?
Health Hazards of Soda

High sugar content

High caffeine content

Phosphoric acid content
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?
According to a Coca-Cola Company
Representative

Safe to drink
Contained in most foods
Content of Some Foods

8 oz Coca-cola classic                                  41mg

10oz Cheddar Cheese                                     145mg

1 Large Egg                                             90mg

(Given by representative named “Kim” over the telephone)
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)
Experimental Method
Molydenum phosphate complex
7H3PO4+ 12 (NH4)6Mo7O2*4H2O 
7(NH4)3[PO4(MoO3)12] + 51NH4+ +
51OH- + 33H2O

Reduced by ascorbic acid
Spectrophotometrically active-blue
The Quant Part
• Calculations
– calibration curve
– least squares
– ppm of Phosphorous in sample
=20*20*XppmP2O5*(75mgP/142mgP2O)
where Xppm = solve for x in least squares
equation.
Results
Sample    Absorbance                                           Standrard Solutions Curve

Sprite         0.006                                               y = 0.6278x + 0.1667

Coca-Cola      0.573
1.6

____________________                                 1.4

1.2

Absorbance
1

0.6
Coca-Cola = 137ppm                                   0.4

= 137mg/L                                0.2

0
which equals about 32mg in 8ozvs lit.                      0       0.5   1       1.5   2   2.5
value of 41mg/80z                                                    ppm of P2O5

Literature: 17 mg (amt. in 100 grams)
Conclusion
Sprite contains less than Coke
Changes to Journal of Chemical Education
procedure
Wrap up of information
References
www.sanangelo.tamu.edu/mg/p.html
www.thecoca-colacompany.com
www.solopro.com/phosnew.html

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