Antioxidant Activity II

We did a series of two experiments on antioxidants in the Introduction to Organic Chemistry laboratory this spring. We chose to use TPTZ (2,4,6-tripyridyl-s-triazine) as our indicator in the ferric reducing antioxidant power (FRAP) assay. As far as I could tell the original article for this assay is a 1996 Analytical Chemistry paper by Benzie […]

Antioxidant Activity I

We did a series of two experiments on antioxidants in the Introduction to Organic Chemistry laboratory this spring. I have seen antioxidant experiments in JCE and I performed one during the CASPiE Workshop a couple of years ago that has been reported in JCE by Burgess. So I have had this on my radar for […]

The Shape of Analysis Part II

This is a second post referring to the “extraction of caffeine from tea” and “extraction of caffeine from beverages” that we did this spring in the introduction to organic chemistry course. On the first “tea” report, I had the students consider a series of HPLC chromatograms that paralleled the previously described UV traces. I presented 1) […]