Analysis of vitamin c and calcium in commercial multivitamins
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Analysis of Vitamin C and Calcium in Commercial Multivitamins. Andrew Mullenax Jesse Diehl Sam Yatzkan. Purpose. To determine the amount of Vitamin C and Calcium in a commercial multivitamin tablet through iodimetric and EDTA titration. Vitamin C Health Benefits.

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Analysis of vitamin c and calcium in commercial multivitamins

Analysis of Vitamin C and Calcium in Commercial Multivitamins

Andrew Mullenax

Jesse Diehl

Sam Yatzkan


Purpose
Purpose Multivitamins

  • To determine the amount of Vitamin C and Calcium in a commercial multivitamin tablet through iodimetric and EDTA titration.


Vitamin c health benefits
Vitamin C Health Benefits Multivitamins

  • Helps tissue/bone grow and repair

  • Fights common cold (Despite minimal evidence)

  • Defend against scurvy

  • Helps the body absorb iron


Calcium health benefits
Calcium Health Benefits Multivitamins

  • Maintain bone health

  • Maintain heart rhythm

  • Control high levels Mg, P, K in blood

  • Recommended for post-menopausal women and persons who are lactose intolerant


Procedure vitamin c
Procedure (Vitamin C) Multivitamins

  • Prepare stock solutions

    • Starch Indicator

    • Sodium Thiosulfate (Standardized)

  • Prepare samples

    • Crush/weight appropriate amount of tablet, titrate

  • Repeat for three good trials while adding starch indicator just before endpoint


Procedure calcium
Procedure (Calcium) Multivitamins

  • Adjust Ammonia buffer to pH 10

  • Prepare stock solutions

    • EDTA (Standardized)

    • Tablet Mixtures

  • Prepare samples with calmagite indicator

  • Titrate to violet endpoint with EDTA


Calculations vitamin c
Calculations (Vitamin C) Multivitamins

  • KIO3 Solution:

  • Standardized Na2S2O3 Solution:

  • Trial 1: 0.074M

  • Ascorbic Acid needed for 15mL titration

  • Mol I3-


Calculations vitamin c cont d
Calculations (Vitamin C Cont’d) Multivitamins

  • Naturemade:

  • Trial 1:

  • Excess I3-

  • Mol I3-Present

  • Vitamin C present (g)

  • Wt% 0.005284g/1.3386g X100%=5.6%


Calculations calcium
Calculations (Calcium) Multivitamins

  • CaCl2Molarity

  • Standardized EDTA

  • EDTA Molarity for NaturemadeSamples

  • Careone: Trial 1:

  • Wt%


Calculations calcium cont d
Calculations (Calcium Cont’d) Multivitamins

  • Naturemade: Trial 1:

  • Wt%


Results vitamin c
Results (Vitamin C) Multivitamins

  • Naturemade (Advertised 180mg per tablet, [13.5%])

    • Average: 5.1%

  • Careone (Advertised 60mg per tablet, [16.6%])

    • Average: 10%


Results calcium
Results (Calcium) Multivitamins

  • Naturemade (Advertised 162mg per tablet, [12.1%])

    • Average: 14.1%

  • Careone (Advertised 45mg per tablet, [12.4%])

    • Average: 19.2%


Conclusions
Conclusions Multivitamins

  • Vitamin C

    • Average weight percent significantly lower than documented

    • Overshot endpoints

  • Calcium

    • Average weight percent was higher than documented

    • Difficult to see endpoint with calmagite indicator


Possible improvements
Possible Improvements Multivitamins

  • Use a better indicator for EDTA titration

  • Use less of crushed sample, more accurate prep. work (Vitamin C)

  • Perform more accurate titrations


Resources
Resources Multivitamins

  • Http://naturemade.com/

  • http://www.care1.info/BRANDS/VITAMIN/daily/daily.html

  • http://www.webmd.com/vitamins-and-supplements/lifestyle-guide-11/supplement-guide-vitamin-c

  • http://www.webmd.com/vitamins-and-supplements/lifestyle-guide-11/supplement-guide-calcium


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