产品详情
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. B?hlke, 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 |
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IAEA-N-1Ammonium Sulfate0.4g15N=0.4‰air N2
IAEA-N-2Ammonium Sulfate0.4g15N=20.3‰air N2
IAEA-NO-3Potassium Nitrate0.5g15N=4.7‰air N2 18O=25.6‰VSMOW
USGS32Potassium Nitrate0.5g15N=180‰air N2 18O=25.7‰VSMOW
USGS34Potassium Nitrate0.5g15N=-1.8‰air N2 18O=-27.9‰VSMOW
USGS35Sodium Nitrate0.5g15N=2.7‰air N2 18O=57.5‰VSMOW
USGS25Ammonium Sulfate0.5g15N=-30.4‰air N2
USGS26Ammonium Sulfate0.5g15N=53.7‰air N2
VSMOWVienna Standard Mean Ocean Water20ml2H=0‰ 18O=0 ‰
SLAP2Water Standard Light Antarctic Precipitation 220ml2H=-427.5‰ 18O=-55.5‰
