Baglivo 2022 MitoFit-QC

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Baglivo 2022 MitoFit-QC

Publications in the MiPMap
Baglivo E, Cardoso LHD, Cecatto C, Gnaiger E (2022) Statistical analysis of instrumental reproducibility as internal quality control in high-resolution respirometry. MitoFit Preprints 2022.18.


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Statistical analysis of instrumental reproducibility as internal quality control in high-resolution respirometry

Baglivo Eleonora, Cardoso Luiza HD, Cecatto Cristiane, Gnaiger Erich (2022-05-09) MitoFit Prep

Abstract: Version 2 (v2) 2022-05-09 doi:10.26124/mitofit:2022-0018.v2

Version 1 (v1) 2022-05-05 doi:10.26124/mitofit:2022-0018.v1 - »Link to all versions«
Graphical abstract

Evaluation of instrumental reproducibility is a primary component of quality control to quantify the precision and limit of detection of analytical procedures. A pre-analytical instrumental standard operating procedure (SOP) is implemented in high-resolution respirometry consisting of: (1) a daily SOP-POS for air calibration of the polarographic oxygen sensor (POS) in terms of oxygen concentration cO2 [µM]. This is part of the sensor test to evaluate POS performance; (2) a monthly SOP-BG starting with the SOP-POS followed by the chamber test quantifying the instrumental O2 background. The chamber test focuses on the slope dcO2/dt [pmol∙s−1∙mL−1] to determine O2 consumption by the POS and O2 backdiffusion into the chamber as a function of cO2 in the absence of sample. Finally, zero O2 calibration completes the sensor test.

We applied this SOP in a 3-year study using 48 Oroboros O2k chambers. Stability of air and zero O2 calibration signals was monitored throughout intervals of up to 8 months without sensor service. Maximum drift over 1 to 3 days was 0.06 pmol∙s−1∙mL−1, without persistence over time since drift was <0.004 pmol∙s−1∙mL−1 for time intervals of one month, corresponding to a drift per day of 0.2 % of the signal at air saturation. Instrumental O2 background -dcO2/dt was stable within ±1 pmol∙s−1∙mL−1 when measured at monthly intervals. These results confirm the instrumental limit of detection of volume-specific O2 flux at ±1 pmol∙s−1∙mL−1. The instrumental SOP applied in the present study contributes to the generally applicable internal quality control management ensuring the unique reproducibility in high-resolution respirometry.

ORCID:ORCID.png Baglivo Eleonora ORCID.png Cardoso Luiza HD, ORCID.png Cecatto Cristiane, ORCID.png Gnaiger Erich

Data availability

Original files are available Open Access at Zenodo repository:


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O2k-specifications for respirometry and comprehensive OXPHOS analysis.
2019-09-19Bioblast pdf » Versions
O2k Quality Control 1: Polarographic oxygen sensors and accuracy of calibration.
2022-04-14Bioblast pdf  » Versions
Service of the polarographic oxygen sensor OroboPOS.
2021-06-23Bioblast pdf »Versions
O2k Quality Control 2: Instrumental oxygen background correction and accuracy of oxygen flux.
2020-04-16Bioblast pdf » Versions
O2k-Chamber cleaning SOP and Integrated Suction System (ISS).
2021-04-27Bioblast pdf » Versions


This work was part of the Oroboros NextGen-O2k project, with funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement nº 859770.


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