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产品名称:
USGS同位素标样, USGS-26
货  号:
USGS-26
规  格:
0.5g
品牌:
 
   产品说明
 

USGS26 , Ammonium Sulfate
Inorganic , Pure Substance
oUnit Size: 0.5g

USGS26 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 (10% 15N; lot BI 1050) by dissolving and re-crystallizing a mixture of normal reagent salt and 15N enriched 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           +53.7     ‰air N2   0.4      C


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

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