USGS同位素标样，USGS26

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].

更多产品请咨询客服

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‰