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 ERDC TN-DOER-C15
July 2000
are consistent, and the error for a specific analytical method can be quantified using standards.
Precise data should still be interpreted in light of identifiable factors that might give results different
from the true value (inaccurate results). For example, concentrations that seem unreasonably high
given what is known about the source of a material may suggest sample or instrument contamination
from other sources. Concentrations that are unexpectedly low may suggest loss mechanisms, such
as volatilization or bacterial degradation occurring in samples improperly stored, or other analytical
error. Careful sample handling, adequate replication, and suitable quality control measures help to
minimize these types of errors.
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