Standardization lecture

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• we’ve seen in class that waters are standardized against SMOW (or VSMOW), carbonates against PDB (or VPDB), nitrogen against AIR, etc.. But what does this mean?
• we’ve seen in class that waters are standardized against SMOW (or VSMOW), carbonates against PDB (or VPDB), nitrogen against AIR, etc.. But what does this mean? • each scale has its own arbitrary zero point. For waters this is VSMOW. The definition of the delta value (in terms of oxygen): δ 18 O sample-VSMOW = ( ( 18 O/ 16 O) sample / ( 18 O/ 16 O) VSMOW – 1 ) * 1000‰
Page 1: Isotope Ratio Standardization
Page 5 and 6: • we generally use a two point ca
Page 7 and 8: • but these original batches were
Page 9 and 10: Uncertainty In Isotope Ratio Measur
Page 11 and 12: • mass spectrometers are used to
Page 13 and 14: • when we make our measurements w
Page 15 and 16: • standards from the IAEA may com
Page 17 and 18: • there are other factors that ca
Page 19 and 20: • Note: many isotope laboratories
Page 21 and 22: Sample Calculation
Page 23 and 24: • Given Info from Analysis (which
Page 25 and 26: Step 1 Subtract backgrounds from si
Page 27 and 28: Step 4 Apply Boato equation to calc
Page 29 and 30: Step 5 Craig 17 O Correction δ 13
Page 31 and 32: Get lost.

Standardization lecture

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