IsoLab
List of all reference materials kept in the IsoLab.
| Reference Material |
δD VSMOW (permil) |
δ13C VPDB (permil) |
δ15N Air N2 (permil) |
Δ17O VSMOW (permil) |
17Oexcess VSMOW (permeg) |
δ18O VSMOW (permil) |
δ34S VCDT (permil) |
Material |
| NBS19 1 | +1.95 | +28.65 | limestone | |||||
| LSVEC 1 | -46.6 | +3.394 | lithium carbonate | |||||
| NBS18 | -5.01 | +7.20 | limestone | |||||
| C1 | +2.55 | +30.41 | marble | |||||
| C2 | -48.94 | +14.04 | calcium carbonate | |||||
| CQS2 | -2.13 | +15.16 | calcium carbonate | |||||
| IAEA-NO-3 | +4.76 | -0.2 | +25.32 | potassium nitrate | ||||
| USGS34 | -1.8 | -0.1 | -27.78 | potassium nitrate | ||||
| USGS35 | +2.7 | +21.6 | +56.81 | sodium nitrate | ||||
| USGS34/35mix | +0.45 | +10.75 | nitrate mixture | |||||
| USGS32 6 | +180 | +25.4 | potassium nitrate | |||||
| IAEA-N-1 6 | +0.43 | ammonium sulfate | ||||||
| NIST8540 | -32.15 | polyethylene foil | ||||||
| NIST8542 | -10.45 | Sucrose | ||||||
| USGS40 | -26.39 | -4.52 | L-glutamic acid | |||||
| USGS41 | +37.63 | +47.57 | L-glutamic acid | |||||
| NIST1547 4 | -25.99 | +1.98 | peach leaves | |||||
| GA1 | -28.2 | -4.6 | glutamic acid | |||||
| GA2 | -13.6 | -5.6 | glutamic acid | |||||
| Salmon | -21.3 | 11.3 | Bristol Bay Sockeye | |||||
| MAL | -26.5 | -0.4 | +8.3 | Malachite Lake Sediment | ||||
| IAEA-S-1 2 | -0.3 | silver sulfide | ||||||
| IAEA-S-3 | -32.55 | silver sulfide | ||||||
| NBS-127 | +21.1 | barium sulfate | ||||||
| Ag2S | +17.60 | silver sulfide | ||||||
| ZnS | -32.31 | zinc sulfide | ||||||
| Ba100 | +4.59 | barium sulfate | ||||||
| sulfα5 | 0.9 | sodium sulfate | ||||||
| sulfβ5 | 2.0 | sodium sulfate | ||||||
| sulfε5 | 7.0 | sodium sulfate | ||||||
| VSMOW3 | 0 | 0 | 0 | Vienna Standard Mean Ocean Water | ||||
| GISP | -190 | 22 | -24.8 | Greenland Ice Sheet Precipitation Water | ||||
| SLAP3,7 | -428 | 0 | -55.5 | Standard Light Antarctic Precipitation Water | ||||
| USGS PR | -1.3 | -1.52 | USGS Puerto Rico Water | |||||
| USGS A1 | -395 | -50.02 | USGS Antarctic Water | |||||
| RW | -18.51 | +5.16 | Evaporatively enriched Seattle Water | |||||
| PW | -41.91 | -6.88 | Pennsylvania Water | |||||
| SW | -75.49 | -10.50 | Seattle Water | |||||
| BW | -156.84 | -20.12 | ITASE / Seattle Water | |||||
| AW | -231.11 | -29.83 | Antarctic Water | |||||
| WW | -267.44 | -33.76 | WAIS Water | |||||
| CW | -266.03 | -33.64 | WDC06A Water NICL 2009 | |||||
| TDW | -309.49 | -38.75 | Taylor Dome Water | |||||
| WGW | -319.48 | -39.83 | WDC06A Water Last Glacial Period | |||||
| SVW | -316.68 | -41.10 | Seattle / Vostok Water | |||||
| VW | -438.57 | -56.56 | Vostok Water | |||||
| O2 gas | 48.4 | -8.26 | Oxygen in compressed gas cylinder | |||||
1 - exact values defining the VPDB delta scale
2 - exact value defining the VCDT delta scale
3 - exact values defining the VSMOW delta scale
4 - NOT accepted, merely a guide
5 - Schauer et al. Rapid Commun. Mass Spectrom. 2012, 26, 2151-2157. DOI: 10.1002/rcm.6332
6 - interim consensus values used for AirN2 scale normalization
7 - Schoenemann et al. Rapid Commun. Mass Spectrom. 2013. DOI: 10.1002/rcm.6486
VPDB = 0.97001*VSMOW - 29.99 (from Coplen blue book)
Δ17O is calculated as δ17O - 0.52 * δ18O and are in units of permil.
17Oexcess is calculated as (ln(δ17O/1000+1)-0.528*ln(δ18O/1000+1))*1000000 and are in units of permeg.