UV Analysis and Absorbance
While conducting UV analysis and absorbance of the extracts of goji berries, Donno et al. (2015) used the methods that were different from the ones used in this project. The researchers used a variety of solvents including; sodium carbonate, ethanol, acetic acid, Folin-Ciocalteu phenols reagent, and cetyltrimethylammonium bromide. In addition, the researchers used digital refractometer DBR35 and automatic titrator in measuring the experiment samples. Under the spectrophotometric analysis, Donno et al. (2015) placed extracts in 50ml test tubes and left idle for 60 minutes before centrifuging the contents. Gallic acid was then added to the solution to facilitate plotting of the curve for studying the rate of absorbance. Accordingly, the antioxidant bioactivity of the extract was tested through the reduction of ferric TPTZ and the researchers noted that UV/VIS spectrophotometric of 1600PC resulted in an absorbance of 595nm (Donno et al. 2015). On the same test, Donno et al. (2015) used chromatrographic analysis using a high performance liquid chromatograph with a queatenrary pump while injection the extracts using a manual valve.