title: Uncertainty in spectrophotometric analysis--"error propagation break up", a novel statistical method for uncertainty management.
abstract: In this work, is given the Combined Standard Uncertainty (CSU) calculation procedure, which can be applied in spectrophotometric measurements. For the assessment of the computations, different approaches are discussed, such as the contribution to the Combined Standard Uncertainty of the reproducibility, the repeatability, the total bias, the calibration curve, and the type of the measurand. Results of inter-laboratory measurements confirmed the assumptions. For the minimization of the errors propagation a controlled experimental procedure was applied by this laboratory, called "errors propagation break-up" (ERBs). The uncertainty of sample concentration from a reference curve dominates the Combined Standard Uncertainty. The contribution of the method and the laboratory bias (total bias) to the CSU is insignificant under controlled conditions of a measurement. This work develops a simple methodology that can be utilized to evaluate the uncertainty and errors control on routine methods used both by academic researchers or the industrial sector.
authors.affiliation: Technological Educational Institute of Western Macedonia, Pollution Control Technologies Department, Environmental Chemistry & Waste Water Treatment Lab., Koila of Kozani, Kozani 50100, Greece. eAmanatidou@teikoz.kozani.gr
authors.forename: Elisavet
authors.initials: E
authors.lastname: Amanatidou
authors.forename: Eleni
authors.initials: E
authors.lastname: Trikoilidou
authors.forename: Lazaros
authors.initials: L
authors.lastname: Tsikritzis
authors.forename: Katsiouli
authors.initials: K
authors.lastname: Foteini