Stable Isotope Reference Materials

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The SIU Mass Spectrometry Facility uses internationally certified reference materials to linearize the raw analytical data obtained from CF-EA-IRMS, CF-TCEA-IRMS (solid samples), CF-TCEA liquid injection-IRMS (water samples), Gas Bench-IRMS (carbonates), and Gas Bench-IRMS (water equilibration). Matrix matched laboratory reference materials that were calibrated through the use of certified reference materials are also available for the same purpose.

Table 1. CF-EA-IRMS Reference Materials

CF-TCEA-IRMS (solid samples) Reference Materials at SIU Mass Spectrometry Facility
Standard ID Reference Material Stable isotope and/or weight % values
USGS34 Potassium nitrate δ 15N=-1.80‰ AIR
USGS35 Sodium nitrate δ 15N=+2.7‰ AIR
USGS 40 L-glutamic acid δ 15N=-4.52‰ AIRδ 13C=-26.39‰ VPDB
USGS 41 L-glutamic acid(enriched) δ 15N=+47.57‰ AIR δ 13C=+37.63‰ VPDB
USGS 42 Human hair δ 15N=+8.05‰ AIRδ 13C=-21.09‰ VPDB
USGS 43 Human hair δ 15N=+8.44‰ AIRδ 13C=-21.28‰ VPDB
IAEA-CH-3 Cellulose δ 13C=-24.72‰ VPDB
IAEA-CH-6 Sucrose δ 13C=-10.45‰ VPDB
IAEA-NO3 Potassium nitrate δ 15N=+4.70‰ AIR
NBS 22 Oil δ 13C=-30.03‰ VPDB
Elemental Microanalysis B2153 Soil Weight %N=0.13Weight %C=1.52

Elemental Microanalysis B2157

Wheat flour

 δ 15N=+2.85‰ AIRδ 13C=-27.21‰ VPDBWeight %N=1.36Weight %C=39.38

Elemental Microanalysis B2159

Sorghum flour

 δ 15N=+1.58‰ AIRδ 13C=-13.68‰ VPDBWeight %N=1.47Weight %C=41.26
LGC PT FM203 Chitin δ 15N=-4.81‰ AIRδ 13C=-27.40‰ VPDB
LGC PT FM209-a Hemp δ 15N=4.61‰ AIRδ 13C=-28.39‰ VPDB
LGC PT FM209-b Olive oil δ 13C=-28.98‰ VPDB
SIUC laboratory standard CELSA Industrial cellulose powder δ 13C=-24.45‰ VPDB
SIUC laboratory standard BS Black spruce δ 15N=-11.85‰ AIRδ 13C=-29.14‰ VPDB
SIUC laboratory standard C Cacao δ 15N=+6.06‰ AIRδ 13C=-27.92‰ VPDB
SIUC laboratory standard AS Ammonium sulfate δ 15N=+0.094 AIR

Costech 031040

Acetanilide

 Weight %N=10.36Weight %C=71.09δ 15N=-1.03‰ AIRδ 13C=-33.91‰ VPDB

Costech 031042

Atropine

 Weight %N=4.84Weight %C=70.56δ 15N=-6.89‰ AIRδ 13C=-22.99‰ VPDB

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Table 2. CF-TCEA-IRMS (solid samples)

CF-TCEA-Liquid Injection-IRMS Reference Materials at SIU Mass Spectrometry Facility
Standard ID Reference Material Stable isotope and/or weight % values
USGS34 Potassium nitrate δ 18O=-27.90‰ VSMOW
USGS35 Sodium nitrate δ 18O=+57.50‰ VSMOW
USGS 42 Human hair δ 2H=-72.9‰ VSMOWδ 18O=+8.56‰ VSMOW
USGS 43 Human hair δ 2H=-44.4‰ VSMOWδ 18O=+14.11‰ VSMOW
NBS 22 Oil δ 2H=-116.90‰ VSMOW
IAEA-NO3 Potassium nitrate δ 18O=+25.60‰   VSMOW
Environment Canada CBS Caribou hoof keratin δ 2H=-166.30‰ VSMOWδ 18O=+2.38‰ VSMOW
Environment Canada KHS Kudu horn keratin δ 2H=-37.10‰ VSMOWδ 18O=+21.21‰ VSMOW
LGC PT FM203 Chitin δ 2H=-29.20‰ VSMOWδ 18O=+31.09‰ VSMOW
LGC PT FM209-a Hemp δ 2H=-89.55‰ VSMOWδ 18O=+21.92‰ VSMOW
LGC PT FM209-b Olive oil δ 2H=-171.15‰ VSMOWδ 18O=+22.08‰ VSMOW
SIUC laboratory standard K1 Industrial keratin powder δ 2H=-60.70‰ VSMOWδ 18O=+8.25‰ VSMOW
Costech acetanilide 031040 Acetanilide Weight %H=6.71Weight %O=11.84
Costech 031042 Atropine Weight %H=8.01Weight %O=16.59

 

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Table 3. CF-TCEA liquid injection-IRMS (Water samples)

Gas Bench-IRMS (carbonates) Reference Materials at SIU Mass Spectrometry Facility
Standard ID Reference Material Stable isotope and/or weight % values
VSMOW2 Water δ 2H=0‰ VSMOWδ 18O=0‰ VSMOW
SLAP2 Water δ 2H=-427.50‰ VSMOWδ 18O=-55.50‰ VSMOW
GISP Water δ 2H=-189.50‰ VSMOWδ 18O=-24.76‰ VSMOW
IAEA OH-13 Water δ 2H=-0.96‰ VSMOWδ 18O=-2.29‰ VSMOW
IAEA OH-14 Water δ 2H=-5.59‰ VSMOWδ 18O=-37.69‰ VSMOW
IAEA OH-15 Water δ 2H=-9.37‰ VSMOWδ 18O=-78.01‰ VSMOW
IAEA OH-16 Water δ 2H=-15.41‰ VSMOWδ 18O=-113.81‰ VSMOW
Elemental Microanalysis WA100 Water δ 2H=-157.12‰ VSMOWδ 18O=-19.64‰ VSMOW
Elemental Microanalysis WA103 Water δ 2H=+843.43‰ VSMOWδ 18O=+108.63‰ VSMOW
SIUC laboratory standard DW1 Water δ 2H=-26.42‰ VSMOWδ 18O=-3.30‰ VSMOW
SIUC laboratory standard DWL Water δ 2H=-132.75‰ VSMOWδ 18O=-23.96‰ VSMOW
SIUC laboratory standard DWH Water δ 2H=+38.81‰ VSMOWδ 18O=+8.38‰ VSMOW

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4. Gas bench - IRMS (carbonates)

Gas Bench-IRMS (water equilibration) Reference Materials at SIU Mass Spectrometry Facility
Standard ID Reference Material Stable isotope values
NBS 18 Carbonatite δ 13C=-5.01‰ VPDBδ 18O=+7.20‰ VSMOW
NBS19 Limestone δ 13C=+1.95‰ VPDBδ 18O=+28.65‰ VSMOW
LSVEC Lithium carbonate δ 13C=-46.60‰ VPDB
Laboratory standard CM Marble δ 13C=+2.09‰ VPDBδ 18O=+29.36‰ VSMOW
Laboratory standard M Industrial calcite powder δ 13C=-47.16‰ VPDBδ 18O=+17.00‰ VSMOW

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5. Gas bench - IRMS (water equilibration)

CF-EA-IRMS Reference Materials at SIU Mass Spectrometry Facility
Standard ID Reference Material Stable isotope and/or weight % values
Elemental Microanalysis WA100 Water δ 18O=-19.64‰ VSMOW
Elemental Microanalysis WA103 Water δ 18O=+108.63‰ VSMOW
SIUC laboratory Antarctic Water AW Water δ 18O=-33.36‰ VSMOW
SIUC laboratory standard DW1 Water δ 18O=-3.30‰ VSMOW
SIUC laboratory standard DWL Water δ 18O=-23.96‰ VSMOW
SIUC laboratory standard DWH Water δ 18O=+8.38‰ VSMOW

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