Volume No. 4 Issue No.: 3 Page No.: 678-686 Jan.-Mar 2010




S. Pansamut1 and G. Wattayakorn?2,3

1. Inter-Department of Environmental Science, Graduate School, Chulalongkorn University, Bangkok 10330 (THAILAND)
2. Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok 10330 (THAILAND)
3. Aquatic Resources Research Institute, Chulalongkorn University, Bangkok 103- 30 (THAILAND)


Received on : November 27, 2009




The present study has managed for the determination of arsenic in water collected from an abandoned tin mining area at Tambon Ong-pra, Amphoe Danchang, Suphanburi Province, in central Thailand. The catchment area comprises an abandoned tin mine and inhabitants of the region. The concentration of arsenic in water samples was determined using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) with emphasis on water sample digestion and interference reduction procedures. Standard addition technique has been found to be an excellent method for reducing matrix effects. Contamination of total arsenic in the water varied from 76 to 748 μg/L, 54 to 530 μg/L and 32 to 607 μg/L in October 2008, January and March 2009, respectively. The highest concentrations were found in the mining pit with the average arsenic concentration of 748 ±285, 530 ± 405 and 607±65 μg/L in October 2008, January and March 2009, respectively. Arsenic concentrations in 80% of the water samples were found to exceed 50 μg/L set by WHO for Drinking-Water Standard. The high concentration of arsenic in water indicates the potential problem to human health from various stages of arsenic poisoning in this area.


Keywords : Tin mining, Arsenic contamination, Suphanburi Province, ICP-MS, Thailand