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中文名称：Ammonium Sulfate Pure Substance 15N
英文名称：Ammonium Sulfate Pure Substance 15N订货以英文名称为准。
产品编号：USGS25CAS：/
品牌：标准物质产地：进口
标准值：见证书分子式：/
规格 市场价(元) 折后价(元) 供货周期 数量 加入购物车 0.5g 0.00 0.00 3-4周 加入购物车
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产品详细介绍
USGS25Ammonium Sulfate Pure Substance 15N
Reference material USGS25 is aimed at δ15N calibrations.
USGS25 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)
