Optimized demineralization technique for the measurement of stable isotope ratios of nonexchangeable H in soil organic matter.
Optimized demineralization technique for the measurement of stable isotope ratios of nonexchangeable H in soil organic matter.
复制标题
用于测量土壤有机质中不可交换氢稳定同位素比的优化脱盐技术
DOI:
10.1021/es303448g
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发表时间:
2013
影响因子:
11.4
通讯作者:
Wilcke
中科院分区:
文献类型:
--
作者:
Ruppenthal;Oelmann;Wilcke
To make use of the isotope ratio of nonexchangeable hydrogen (δ2Hn (nonexchangeable)) of bulk soil organic matter (SOM), the mineral matrix (containing structural water of clay minerals) must be separated from SOM and samples need to be analyzed after H isotope equilibration. We present a novel technique for demineralization of soil samples with HF and dilute HCl and recovery of the SOM fraction solubilized in the HF demineralization solution via solid-phase extraction. Compared with existing techniques, organic C (Corg) and organic N (Norg) recovery of demineralized SOM concentrates was significantly increased (Corgrecovery using existing techniques vs new demineralization method: 58% vs 78%; Norgrecovery: 60% vs 78%). Chemicals used for the demineralization treatment did not affect δ2Hnvalues as revealed by spiking with deuterated water. The new demineralization method minimized organic matter losses and thus artificial H isotope fractionation, opening up the opportunity to use δ2Hnanalyses of SOM as a new tool in paleoclimatology or geospatial forensics.
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影响因子:
6.1
作者:
M. Ruppenthal;Y. Oelmann;W. Wilcke
通讯作者:
M. Ruppenthal;Y. Oelmann;W. Wilcke
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
A. Mitra;J. Rimstidt
通讯作者:
J. Rimstidt
影响因子:
56.9
作者:
W. Schiegl
通讯作者:
W. Schiegl
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
T. Tambach;H. Veld;J. Griffioen
通讯作者:
J. Griffioen
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
L. Wassenaar;K. Hobson
通讯作者:
K. Hobson