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2016
Conference Paper
Titel
Sensory evaluation of building products
Titel Supplements
A critical discussion of the overall method
Abstract
Sensory testing is a criterion in many building product evaluation schemes, usually in combination with the determination of volatile organic compounds in the chamber air. The objective of a current research project was to evaluate the proposed methods of perceived intensity with respect to ISO 16000-28 for their suitability in practice. Our results clearly demonstrate that a) the analytical determination of acetone/air reference gas by use of an FID is a sophisticated task and requires careful calibration and individual determination of correction factors; b) air sampling and assessment methods are not adequately described; c) in most cases the assumed normality distribution of the data must be rejected; d) individual responses are skewed; e) the response of panelists to acetone reference concentrations does not follow the linear calibration curve. In summary, ISO 16000-28 needs a comprehensive evaluation regarding precision and robustness.