Control samples are any type of well-known samples used to assure analyses are properly performed so that results are reliable. These control samples are fully known to the client with respect to composition, identification, source, type and its metrological characteristics (known values of certain characteristics, their standard deviations and uncertainties). They may be used as blind samles.
Both, control and blind samples are used for the purposes of the laboratory control with respect to the validity of the results.
PTS Bulgaria Ltd offers control samples which are left from a certain PT scheme.
The following control samples are available at the moment: