Case Sample Data

This is the measured concentration of your case sample, used as the baseline for uncertainty calculations.

The number of replicate measurements performed on your case sample. Typically between 1-10.

The confidence level determines the coverage factor from the t-distribution table. 95% is most commonly used. Maximum allowed value is 99.99%.

The coverage factor (k) is multiplied by the combined uncertainty to get expanded uncertainty. Common values: 1.96 (95% CI), 2.58 (99% CI).