There are a number of experiments to determine various biomolecules in food both qualitatively and quantitatively. The following are examples of quantitative determination of iron and protein most of which can be performed in a high school. Please examine the procedures even if you do not actually perform any of these.

Experiments to determine iron concentration:

• Spectrophotometric Determination of Iron in a Vitamin Supplement: An experiment [local]
• Colorimetric Fe Analysis [local]
• Spectrophotometric Determination of Iron in Vitamin Supplement Tablets: An experiment
• Low Technology Iron in Foods Experiment.

Experiments to determine protein concentration:

• Bradford total protein assay [local]
• A collection of information on protein assays [local]