Identification of Antioxidant Activity by Different Methods of a Freshwater Alga (Microspora Sp.) Collected From a High Mountain Lake

  • Bulent Akar Department of Food Engineering, Faculty of Engineering and Natural Sciences, Gümüşhane University, Gümüşhane, Turkey
  • Zeynep Akar Department of Genetic and Bioengineering, Faculty of Engineering and Natural Sciences, Gümüşhane University, Gümüşhane, Turkey
  • Bulent Sahin Karadeniz Technical University, Fatih Education Faculty, Department of Biology Education, 61335 Söğütlü-Trabzon, Turkey


Algae contain a large amount of biological active compounds functioning as antioxidant, antimicrobial and anti-tumour. In the present research, antioxidant activity of freshwater alga Microspora sp.  (Chlorophyta) extract prepared in different solvents (methanol, acetonitrile, ethanol, acetone and ethyl acetate) was determined with three different methods; 2,2-diphenyl-1-picrylhydrazyl (DPPH•), Iron (III) Reduction / Antioxidant Power (FRAP) Assay and Copper (II) Reductive Antioxidant Activity (CUPRAC). The alga samples collected from the high mountain lake (2733 meters above sea level) localized in Gümüşhane province of Turkey. The algal extracts prepared in different solvents showed antioxidant activity. The values of DPPH• varied from 8.97%  (in acetonitrile extract) to 31.15% (in methanol extract).  As in the DPPH• method, the lowest and highest values in the FRAP method were measured based on μM TEAC (Trolox Equivalent Antioxidant Capacity) in methanol and acetonitrile extracts as 60.303 μM and 359.394 μM respectively. While the lowest value of CUPRAC test was determined in acetonitrile extract (0.041 μM TEAC ) as in the other tests, highest value  was measured in ethanol extract (0.101 μM TEAC ) as different from the others. While the values of highest antioxidant activity in both DPPH• and FRAP methods was measured in the methanol solvent, it was determined in the ethanol solvent for CUPRAC.


Algae; Microspora sp.; Antioxidant; DPPH•; FRAP; CUPRAC

DOI: 10.17350/HJSE19030000129

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How to Cite
Akar, B., Akar, Z., & Sahin, B. (2019). Identification of Antioxidant Activity by Different Methods of a Freshwater Alga (Microspora Sp.) Collected From a High Mountain Lake. Hittite Journal of Science & Engineering, 6(1), 25-29. Retrieved from