lab 3 karissa graded.docx - Karissa Lukes Mia Greco 20190918 Iron Content in Vitamins Objective The goal of this experiment was to find the

lab 3 karissa graded.docx - Karissa Lukes Mia Greco...

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Karissa Lukes Mia Greco 20190918 Iron Content in Vitamins Objective The goal of this experiment was to find the concentration of iron content in vitamins through the use of Beer’s Law. Through the use of a spectrometer and calculations of absorbance, the vitamin concentration in a vitamin was found. Data Tables Preparation of Standard Solutions Standard Solution Volume of iron stock (mL) Volume of sodium citrate (drops) Volume of hydroquinone (mL) Volume of o- phenanthroline (mL) A 5.0 20 1.0 1.5 B 3.0 12 1.0 1.5 C 2.0 8 1.0 1.5 D 1.0 4 1.0 1.5 Blank (5) Standard Solution Concentrations Standard Absorbance Concentration (ppm) A .847 4 B .546 2.4 C .337 1.6 D .166 .8 Preparation of Sample Solution Assigned Vitamin Volume of vitamin solution (mL) Volume of sodium citrate (drops) Volume of hydroquinone (mL) Volume of o- phenanthroline (mL)
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Energy 50 63 1 1.5 Vitamin Sample Solution Dilution of Tablet (from instructor) Manufacturer’s Claimed Amount Absorbance 1:10 9mg .192 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 f(x) = 0.21 x + 0 R² = 1
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