Basic Training 4th Annual ICP Conference

Accounting for Uncertainty

1. What is being measured? 2. What are the sources? 3. How do you quantify?

4. How do you combine? 5. How do you report?

1. What is being measured? • Write equation • Frequently, this is concentration • Driven by SOP

! "#$%&' ! "() * "() +, "#$%&' "-&.(/-0 +, "#$%&' 1 = * "#$%&'

• Account for all steps in the process • Sampling

• Preparation • Calibration

• Storage • Analysis • Etc.