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Journal of Biotechnology and Phytochemistry
Volume 1 Issue 3
Chemistry World 2017
Page 73
November 13-15, 2017 Athens, Greece
7
th
World Congress on
Chemistry
Risks of a false decision on conformity of
a multicomponent material and quality of
chemical analytical results
Ilya Kuselman
1
, Francesca R Pennecchi
2
, Ricardo J N B da Silva
3
and
D
Brynn Hibbert
4
1
Independent Consultant on Metrology, Israel
2
Istituto Nazionale di Ricerca Metrologica, Italy
3
University of Lisbon, Portugal
4
UNSW Sydney, Australia
Comparing chemical analytical (test) results with the
material specification, regulatory or acceptance limits of
the component content, one should decide whether the
tested sample (batch/lot) conforms or not. It is known that
measurement uncertainty, which characterizes the quality
of a result, leads to risks of false decisions. Evaluation of
such risks for a multicomponent material or object involves
calculation of probabilities of false decisions for the different
components of the material or object (particular consumer’s
and/or producer’s risks). At the same time, even when
conformity assessment for each component of a sample
is successful, the total probability of a false decision (total
consumer’s risk or producer’s risk) on the conformity of the
sample as a whole may still be significant. The total risk due to
measurement uncertainty can be evaluated as a combination
of the particular risks of conformity assessment of the sample
components, whenever there is independence among their
test results. Possible correlation can be viewed as a further
quality parameter of the results, influencing the total risk of
false decisions. It should be also taken into account at the risk
evaluation.
ilya.kuselman@gmail.comJ Biotech and Phyto 2017