Analysis of Iron in a Vitamin Tablet

Analysis of Iron in a Vitamin Tablet - Analysis of Iron in...

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Analysis of Iron in a Vitamin Tablet Casey Carr February 10, 2010
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Introduction: The average adult human body contains 2 to 4 grams of iron, which is mostly found in the red blood cell protein called hemoglobin. Hemoglobin transports oxygen from the lungs to the various tissues in the body where it is used to produce energy. 1 The important thing about iron consumption is not the amount taken in, but the amount absorbed and stored, since unabsorbed iron gets flushed out of the body. Humans obtain iron from their diet in foods such as lean meats and green vegetables. However, just as some foods aid absorption, others block it. Coffee and tea, for instance, contain compounds called tannins, which block the absorption of iron from sources other than meat. 2 Dietary supplements of iron can be taken to alleviate anemia, a condition caused by lack of iron, which results in low energy and pale skin tone. Most vitamin tablets contain iron in the form of ferrous fumarate, [Fe 2+ (C 4 H 2 O 4 ) 2- ]. Iron from a vitamin tablet was dissolved in hydrochloric acid, reduced to Fe 2+ with hydroquinone, and complexed with o- phenanthroline to form an intensity colored complex. 3 Experimental: A Bausch and Lomb Spectronic 20 was used to determine the percent transmittance values recorded. The following materials were used: hydroquinone, trisodium citrate, o- phenanthroline, standard Fe, 6M HCL, and deionized water. One commercial ferrous
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