作者: Jiří Zbíral , Jana Pavlíčková , Šárka Havlíková , Eva Čižmárová , Pavel Němec
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摘要: Thallium (Tl) and its compounds are toxic to all organisms. Relatively high levels of thallium pedogeochemical origin have been found in some areas the Czech Republic. The contents >2 mg kg−1 Tl aqua regia soil extracts soils originated from melanocratic porphyric hornblende-biotite granite or granodiorite. range 0.45–1 mg kg−1 occurred mainly paragneiss. A detailed study these sites has made. Content was determined after extraction with regia, 2 M HNO3, DTPA-TEA 1 M NH4NO3. Plant samples (whole rapeseed kernels) were wet ashed total content determined. amount extracted by different extracting methods comparison (100%) approximately 14% for 0.8% NH4NO3 only about 0.03% DTPA-TEA. rapeseeds 75% this element determin...