Calibration of δ17O and δ18O of international measurement standards - VSMOW, VSMOW2, SLAP, and SLAP2
Calibration of δ17O and δ18O of international measurement standards - VSMOW, VSMOW2, SLAP, and SLAP2
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DOI：
10.1002/rcm.4449
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发表时间：
2010-03-01
影响因子：
2
通讯作者：
Groening, Manfred
中科院分区：
文献类型：
--
作者：
Lin, Ying;Clayton, Robert N.;Groening, Manfred
由于维也纳标准平均海洋水(VSMOW)和标准轻南极降水(SLAP)这两个主要校准材料耗尽，产生了两个替代材料VSMOW2和SLAP2，其D/H和O-18/O-16比值的同位素组成尽可能接近原始标准。因此，对三角洲O-17组分的测量构成了对所实现的同位素调整的适当的独立检查。用BrF5氟化VSMOW、VSMOW2、SLAP和SLAP2安瓶中的等量物质，用双入口Delta E质谱仪进行分析。在测量不确定度范围内，VSMOW2和SLAP2分别与VSMOW和SLAP的增量O-17和增量O-18值没有区别。这一结果证实了VSMOW2和SLAP2与其前身的成功同位素匹配。进一步检查SLAP2的增量O-18值似乎是可取的。版权所有(C)2010 John Wiley&Sons，Ltd.
Due to exhaustion of the two primary calibration materials, Vienna Standard Mean Ocean Water (VSMOW) and Standard Light Antarctic Precipitation (SLAP), two replacement materials, VSMOW2 and SLAP2, were created with isotopic compositions as close as possible to the original standards in their D/H and O-18/O-16 ratios. Measurements of the delta O-17 composition constitute therefore an appropriate independent check of the achieved isotopic adjustment. Aliquots from ampoules of VSMOW, VSMOW2, SLAP, and SLAP2 were fluorinated by BrF5 and analyzed using a dual-inlet Delta E mass spectrometer. VSMOW2 and SLAP2 were found to be indistinguishable from VSMOW and SLAP, respectively, in their delta O-17 and delta O-18 values within measurement uncertainties. This result is a confirmation of the successful isotopic matching of VSMOW2 and SLAP2 to their predecessors. Further checks of the delta O-18 value of SLAP2 seem desirable. Copyright (C) 2010 John Wiley & Sons, Ltd.