The collection and preparation of two soil reference samples and two till reference samples are described. Like their predecessors the LKSD series and the STSD series, the TILL series are characterized for total elements and for elements derived by partial extractions. Provisional data are presented for major, minor and trace elements. In addition, information data from a single source are provided for a number of elements derived by EPA digestions 3050 and 3051; these data allow a comparison with other partial extractions reported herein.
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John J. Lynch (1996) studied this question.
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