Each report should have an explanation of how the uncertainty is calculated such as the comment
below
Measurement Uncertainty
The measurement uncertainty is an estimate that characterises the range of values within which
the true value is asserted to lie. The uncertainty estimate is an expanded uncertainty using a
coverage factor of 2, which gives a level of confidence of approximately 95%. The estimate is
compliant with the “ISO Guide to the Expression of Uncertainty in Measurement” and is a full
estimate based on in-house method validation and quality control data.