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The δ30Si and δ18O values of silica phytoliths precipitated in plants can be applied to palaeoenvironmental reconstructions. This study examines the effect of partial dissolution of phytoliths on their isotopic compositions and physical characteristics (specific surface area, mean particle size) and discusses problems with paleoclimate reconstructions using the δ18O and δ30Si values of phytoliths...
Because humic substances have varying turnover rates, their stable carbon-isotope compositions have been used to assess carbon residence time in soils. However, any study of this nature must ensure that extraction techniques do not fractionate the δ 13 C values of the humic acid extract and residual humin. This study examines the effects of different extraction procedures on the carbon-isotope...
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