This lab experiment involves determining the amount of iron in a supplement sample using colorimetric analysis. Iron will form a red-colored complex when reacted with o-phenanthroline ligand in an acidic solution. Various concentrations of a standard iron solution will be used to construct a calibration curve by measuring their absorbances. Then an unknown supplement sample will be analyzed to determine its iron concentration by comparing its absorbance to the calibration curve. Proper precautions and procedures will be followed when working with the chemicals involved, which include acids, ligands and metal solutions.

ε ε ε and iron supplement. The concentration of the unknown will be determined by extrapolation to the calibration curve and by using visual inspection

ε ε ε and iron supplement. The concentration of the unknown will be determined by extrapolation to the calibration curve and by using visual inspection PDF

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