4-6 February 2019
Centara Grand at Central Ladprao
Asia/Bangkok timezone
Deadline for full paper revision: 21 May 2019.

Natural Radioactivity Concentration in Traditional Thai Herbal Medicine

4 Feb 2019, 14:50
Centara Grand at Central Ladprao

Centara Grand at Central Ladprao

Chatuchak, Bangkok 10900, Thailand
Poster Agriculture and Food Poster 1


Dr Chutima Kranrod (Chulalongkorn University)


The aim of this study is to create a database of radioactivity concentration and annual effective dose of the naturally occurring radionuclides: $^{226}$Ra, $^{228}$Ra, $^{40}$K and $^{210}$Po in Thai medicinal herb plants. 99 types of popular Thai medicinal herb plants (total of 212 samples) such as $\textit{Curcuma comosa}$ Roxb., mucuna, white kwao krua, barbed grass, black galingale, lingzhi mushroom, $\textit{Ginkgo biloba}$, jiaogulan, plu kaow, turmeric, ginger, safflower, moringa, gotu kola and garlic were randomly collected from drug stores and herbal fair. The activity concentration of $^{226}$Ra, $^{228}$Ra and $^{40}$K in all herb samples was determined by gamma-ray spectrometry while that of $^{210}$Po was determined by alpha spectrometry. The activity concentration was found to range from <0.20 to 89.92 Bq kg$^{-1}$ for $^{226}$Ra, from <0.10 to 39.62 Bq kg$^{-1}$ for $^{228}$Ra and from 4.83 to 2761.33 Bq kg$^{-1}$ for $^{40}$K and from 0.32 to 47.13 Bq kg$^{-1}$ for $^{210}$Po. The highest activities concentration of $^{226}$Ra, $^{228}$Ra, $^{40}$K and $^{210}$Po were found in the white kwao krua, jiaogulan, plu kaow and ginkgo, respectively. The average total annual effective dose due to ingestion of these herbal plants was assessed to range from 0.0001 to 0.0327 mSv y$^{-1}$, with highest dose found in jiaogulan.

Primary author

Dr Chutima Kranrod (Chulalongkorn University)


Prof. Supitcha Chanyotha (Chulalongkorn University) Phongphaeth Pengvanich (Faculty of Engineering, Chulalongkorn University) Dr Rawiwan Kritsananuwat (Chulalongkorn University) Mr Yutthana Tumnoi (OAP) Ms Thamaborn Ploykrathok Mrs Tarika Thumvijit

Presentation Materials