Assessment of 0.1M HCl extraction protocol in determining available Cd in andosol
2001
Zhao, X. (Tohoku Univ., Sendai (Japan)) | Saigusa, M.
In Japan, 0.1 M HCl method was stipulated as a tool to evaluate the available cadmium content of soils. Its feasibility on available cadmium determination for Andisol was assessed and the extraction conditions were investigated through Cd recovery experiments. The results showed that only about 80% of Cd added was recovered in paddy soil from Kawatabi Andisol and 23.1% to 92.4% of Cd added were recovered from other Andisols, when extracted by the stipulated method. Improving of extraction concentration did not result in enough recovery, but the increase of soil : solution ratio did increase Cd recoveries of Andisol. Most Andisols had full Cd recoveries when extracted with a soil : solution ratio of 1 : 20. Therefore, it is suggested that the soil : solution ratio of the stipulated method should be changed to 1 : 20 for Andisol.
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