Standardization lecture

More documents

Recommendations

Info

• how exactly does the software go about calculating a delta value from measurements? Here is an example of calculating δ 13 C for CO 2 generated from CaCO 3 :
• Given Info from Analysis (which we all should somewhat understand from the lab tours): Sample CO 2 Ion Beam Intensity (mV) mass 44 mass 45 mass 46 4727.247 5646.864 6090.994 Ref CO 2 Ion Beam Intensity (mV) mass 44 mass 45 mass 46 4703.024 5538.986 6054.629 Background CO 2 Ion Beam Intensity (mV) mass 44 mass 45 mass 46 2.71 3.27 3.62 Ref Gas δ 13 C -13.26‰, VPDB δ 18 O -10.80‰, VPDB
Page 1 and 2: Isotope Ratio Standardization
Page 3 and 4: • we’ve seen in class that wate
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: Sample Calculation
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

Create successful ePaper yourself

Delete template?

Save as template?