• Suchada Maisont
  • Wisutthana Samutsri -
  • Arthit Sansomboon


COVID-19, Solar dryer, Fingerroot, Turmeric, Andrographis, Curcumin


In this study, white fingerroot, turmeric, and green chiretta were dried using a solar dryer, reducing their moisture contents to 9.72, 10.14, and 9.83% on the wet basis (wb), respectively. The HPLC technique was used to examine the active components. The flavonoids, which include Pinostrobin 66.57 mg/g and Panduratin A 3.04 mg/g, are the active component of dried white fingerroot. Fresh and dried turmeric were found to have 6.78 mg/g and 48.23 mg/g of curcumin, respectively. The dried green chiretta leaf and stem powder contained 34.94 mg/g of andrographolide. In addition, the Thai Community Product Standard of 480/2547 indicated that the total microorganism was fewer than 1×103 colonies/gram. Finally, the powdered dry herb was placed into capsules for easy application.


Akaji, K., & Kono, H. (2020). Design and evaluation of anti-SARS-Coronavirus agents based on molecular interactions with the viral protease. Molecules, 25, 3920.

AOAC. (2000). Official method of Analysis. 15th ed The Association of Official Analytical Chemists. Arlington, Virginia.

Benjaponpithak, A., Visithanon, K., Sawaengtham, T., Thaneerat, T., & Wanaratna, K. (2021). Short communication on the use of Andrographis herb (Fa Thalai Chon) for the treatment of COVID-19 patients. Journal of Thai Traditional and Alternative Medicine, 19(1), 229-233.

Chabot, A. B., & Huntwork, M. P. (2021). Turmeric is a possible treatment for COVID-19-induced Anosmia and Ageusia. Cureus, 13(9),17829.

Čiplienė, A., Novošinskas, H., Raila, A., & Zvicevičius, E. (2015). Usage of hybrid solar collector system in drying technologies of medical plants. Energy Conversion and Management, 93, 399–405.

Condorí, M., Duran, G., Echazú, R., & Altobelli, F. (2017). Semi-industrial drying of vegetables using an array of large solar air collectors. Energy for Sustainable Development, 37, 1–9.

Department of Thai Traditional and Alternative Medicine. (2021). Things to know on using andrographolide in Andrographis paniculata products for COVID-19 treatment. Bangkok: Beyond Publishing Company Limited.

García-Valladares, O., Ortiz, N. M., Pilatowsky, I., & Menchaca, A. C. (2020). Solar thermal drying plant for agricultural products. Part 1: Direct air heating system. Renewable Energy, 148, 1302-1320.

Janjai, S. (2012). A greenhouse type solar dryer for small-scale dried food industries: Development and dissemination. International. Journal of Energy and Environment, 3(3), 383-398.

Kanjanasirirat, P., Suksatu A., Manopwisedjaroen, S., Munyoo B., Tuchinda, P., Jearawuttanakul, K., Seemakhan, S., Charoensutthivarakul, S., Wongtrakoongate, P., Rangkasenee, N., Pitiporn, S., Waranuch, N., Chabang, N., Khemawoot, P., Sa-Ngiamsuntorn, K., Pewkliang, Y., Thongsri, P., Chutipongtanate, S., Hongeng, S., Borwornpinyo, S., & Thitithanyanont, A. (2020). High-content screening of Thai medicinal plants reveals Boesenbergia rotunda extract and its component Panduratin A as anti-SARS-CoV-2 agents. Scientific Reports, 10(1), 19963.

Maisont, S., Samutsri, W., Sansomboon, A., & Limsuwan, P. (2022). Drying edible jellyfish (Lobonema smithii) using a parabolic greenhouse solar dryer. Food Research, 6(6), 165-173.

Nimnuan, P., & Nabnean, S. (2019). Solar drying of Galangal slices (Alpinia Galangal (Linn.) Swartz.) using household solar dryer. Suranaree Journal Science Technology, 27(4), 1-8.

Thai Food and Drug Administration. (2017). The list of plants approved for use in dietary supplements. The announcement of the Thai Food and Drug Administration on the 7th of August 2017.

Usub, T., Lertsatitthanakorn, C., Poomsa-ad, N., Wiset, L., Yang, L. & Siriamornpun, S. (2008). Experimental performance of a solar tunnel dryer for drying silkworm pupae. Biosystems Engineering, 101, 209-216.

Wang, H., Zhang, M., & Mujumdar, A. S. (2014). Comparison of three new drying methods for drying characteristics and quality of Shiitake mushroom (Lentinus edodes). Drying Technology, 32(15), 1791–1802.






บทความวิจัย (Research Article)