USGS同位素标样，USGS-26

 

USGS26 , Ammonium Sulfate

Unit 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

更多产品

 

IAEA-N-1	Ammonium Sulfate	0.4g	15N=0.4‰air N2
IAEA-N-2	Ammonium Sulfate	0.4g	15N=20.3‰air N2
IAEA-NO-3	Potassium Nitrate	0.5g	15N=4.7‰air N2  18O=25.6‰VSMOW

 

USGS32	Potassium Nitrate	0.5g	15N=180‰air N2  18O=25.7‰VSMOW
USGS34	Potassium Nitrate	0.5g	15N=-1.8‰air N2  18O=-27.9‰VSMOW
USGS35	Sodium Nitrate	0.5g	15N=2.7‰air N2  18O=57.5‰VSMOW
USGS25	Ammonium Sulfate	0.5g	15N=-30.4‰air N2
USGS26	Ammonium Sulfate	0.5g	15N=53.7‰air N2

 

VSMOW

Vienna Standard Mean Ocean Water

20ml

2H=0‰ 18O=0 ‰

 

SLAP2

Water Standard Light Antarctic Precipitation 2

20ml

2H=-427.5‰ 18O=-55.5‰

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