USGS同位素标样，USGS-25_IAEA同位素标样

IAEA同位素标样

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USGS同位素标样，USGS-25

添加时间：2018-06-05

USGS同位素标样，USGS-25 同位素标样... USGS同位素标样，USGS-25

货号：USGS-25
规格：
品牌：

USGS-25 , Ammonium Sulfate
Inorganic , Pure Substance

oUnit Size: 0.5g

SGS25 is a dried salt of ammonium sulfate [(NH4)2 SO4]) which was prepared in 1992 by J. K. Böhlke, U.S. Geological Survey [1]. The material was prepared from Fisher ammonium sulfate (A938-500, lot #915021) and Cambridge Isotopes ammonium sulfate (99.99% 14N; lot BI 1328) BI 1050) by dissolving and re-crystallizing a mixture of normal reagent salt and 15N depleted salt. The δ15N value of this reference material is the result of the statistical evaluation of interlaboratory comparisons [1,2].

Analyte Value Unit SD R/I/C
δ15N -30.4 ‰air N2 0.4 C

(R/I/C) Classification assigned to the property value for analyte (Recommended/Information/Certified)

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