Error propagation in open respirometric assays

Brazilian Journal of Chemical Engineering

C. C. Lobo²  N. C. Bertola²  E. M. Contreras¹ 

[1] ,UNLP Facultad de Ciencias Exactas Centro de Investigación y Desarrollo en Criotecnología de AlimentosLa Plata,Argentina

关键词: Respirometry;    Error propagation;    Respiration rate;    Oxygen consumption;   

DOI  :  10.1590/0104-6632.20140312s00002659

来源: SciELO

【 摘 要 】

This work deals with the calculation of the uncertainty of the exogenous respiration rate (Rex) and the total oxygen consumed (OCT) derived from a single open respirometric profile. Uncertainties were evaluated by applying a linear error propagation method. Results show that standard deviations (SD) of Rex and OCT depend not only on the SD of the dissolved oxygen (σC) and kLa (σkLa), but also on the SD of the derivative term (dC/dt) of the oxygen mass balance equation (σb). A Monte Carlo technique was employed to assess σb; a power law expression for the dependence of σb as a function of σC, the time window (t w) and the sampling rate (Δt) was proposed. The equations obtained in the present work are useful to calculate suitable conditions (e.g., biomass concentration, kLa) that minimize the coefficient of variation corresponding to Rex and OCT.

【 授权许可】

CC BY   
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