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?
    Why Is It Added Then?
According to a Coca-Cola Company
          Representative

          Adds tartness
          Adds acidity
          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

Sprite - about 0                                     0.8

                                                     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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