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Geochemical Journal
Geochemical Journal An open access journal for geochemistry
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Adsorption of amino acids on argillaceous rocks and its implication to the contamination of geological samples

Masahiko Akiyama
Geochemical Journal, Vol. 19, No. 1, P. 55-57, 1985

ABSTRACT

Amino acids in solution are adsorbed by Miocene argillaceous rock fragments which contain clay minerals of mica-smectite mixed layer. The order of the adsorption is as follows; lysine > glycine > alanine > valine, leucine > aspartic acid. Since basic amino acids are selectively adsorbed in the rocks, the amino acid composition could not be an indicator for determining the depositional environment, contrary to the studies of Sasaki (1978, 1974).

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