The student extensively describes the topic of the investigation in the Introduction, testing the antioxidant content of superfoods: fucus, chlorella, spirulina, matcha, barley, wheatgrass, and kale, using spectrophotometry. However, the topic statement could have been more pronounced. The student could have added the chosen experimental method to the research question, such as "What is the antioxidant content [μmol/dm3 of filtrate] in superfoods: fucus, chlorella, spirulina, matcha, barley, wheatgrass, and kale, measured using spectrophotometry?" The background of the experiment provides a good explanation of the key concepts necessary for understanding the investigation, and the chemistry of the experiment is very clearly explained. The student uses an appropriate method, phenanthroline assay for spectrophotometry, to find out the concentration of antioxidants in selected superfoods. The methodology includes appropriate steps to assure the relevancy and validity of the obtained results, and the student shows full awareness of safety, ethical, and environmental concerns that can arise during the experiment.
