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Difference between revisions of "Baglivo 2022 Abstract Bioblast"

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{{Abstract
{{Abstract
|title=[[File:BaglivoE.jpg|left|100px|Baglivo Eleonora]] <u>Baglivo Eleonora</u>, Cardoso LHD, Cecatto C, Gnaiger E (2022) Statistical analysis of instrumental reproducibility as internal quality control in high-resolution respirometry. Bioblast 2022: BEC Inaugural Conference.
|title=[[File:BaglivoE.jpg|left|100px|Baglivo Eleonora]] <u>Baglivo Eleonora</u>, Cardoso LHD, Cecatto C, Gnaiger E (2022) Statistical analysis of instrumental reproducibility as internal quality control in high-resolution respirometry. Bioblast 2022: BEC Inaugural Conference. <br>[[Baglivo 2022 MitoFit-QC|»''MitoFit Preprint''«]]
|info=[https://wiki.oroboros.at/index.php/Bioblast_2022#Submitted_abstracts Bioblast 2022: BEC Inaugural Conference]
|info=[https://wiki.oroboros.at/index.php/Bioblast_2022#Submitted_abstracts Bioblast 2022: BEC Inaugural Conference]
|authors=
|authors=
Baglivo Eleonora, Cardoso Luiza HD, Cecatto Cristiane, Gnaiger Erich  
Baglivo Eleonora, Cardoso Luiza HD, Cecatto Cristiane, Gnaiger Erich  

Revision as of 10:56, 20 May 2022

Baglivo Eleonora
Baglivo Eleonora, Cardoso LHD, Cecatto C, Gnaiger E (2022) Statistical analysis of instrumental reproducibility as internal quality control in high-resolution respirometry. Bioblast 2022: BEC Inaugural Conference.
»MitoFit Preprint«

Link: Bioblast 2022: BEC Inaugural Conference

Baglivo Eleonora, Cardoso Luiza HD, Cecatto Cristiane, Gnaiger Erich (2022)

Event: Bioblast 2022

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.

Keywords: high-resolution respirometry HRR; polarographic oxygen sensor POS; air calibration; instrumental background; reproducibility; limit of detection; internal quality control IQC; standard operating procedure SOP

O2k-Network Lab: AT Innsbruck Oroboros


Affiliations and support

Oroboros Instruments, Innsbruck, Austria

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