Liquid scintillation counting at the limit of detection in biogeosciences
Liquid scintillation is widely used to quantify the activity of radioisotopes. We present an overview of the technique and its application to biogeosciences, particularly for turnover rate measurements. Microbial communities and their metabolism are notoriously difficult to analyze in low energy env...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-07-01
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| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2023.1194848/full |
| _version_ | 1827906055695237120 |
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| author | Florian Schubert Jens Kallmeyer |
| author_facet | Florian Schubert Jens Kallmeyer |
| author_sort | Florian Schubert |
| collection | DOAJ |
| description | Liquid scintillation is widely used to quantify the activity of radioisotopes. We present an overview of the technique and its application to biogeosciences, particularly for turnover rate measurements. Microbial communities and their metabolism are notoriously difficult to analyze in low energy environments as biomass is exceedingly sparse and turnover rates low. Highly sensitive methods, such as liquid scintillation counting, are required to investigate low metabolic rates and conclusively differentiate them from the background noise of the respective analyzer. We conducted a series of experiments to explore the effects of luminescence, measurement time and temperature on scintillation measurements. Luminescence, the spontaneous emission of photons, disproportionally affects samples within the first few hours after sample preparation and can be minimized by following simple guidelines. Short measurement times will negatively affect liquid scintillation analysis or if background noise makes up a significant proportion of the detected events. Measurement temperature affected liquid scintillation analysis only when the temperature during the measurement reached approximately 30°C or higher, i.e. the liquid scintillation analyzer was placed in an environment without temperature control, but not in cases where chemicals were stored at elevated temperatures prior to measurement. Basic understanding on the functionality of a liquid scintillation analyzer and simple precautions prior to the measurement can significantly lower the minimum detection limit and therefore allow for determination of low turnover rates previously lost in the background noise. |
| first_indexed | 2024-03-13T00:51:19Z |
| format | Article |
| id | doaj.art-74a766518cb84085a36f310bc3a176b4 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-03-13T00:51:19Z |
| publishDate | 2023-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-74a766518cb84085a36f310bc3a176b42023-07-07T13:56:34ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2023-07-011410.3389/fmicb.2023.11948481194848Liquid scintillation counting at the limit of detection in biogeosciencesFlorian SchubertJens KallmeyerLiquid scintillation is widely used to quantify the activity of radioisotopes. We present an overview of the technique and its application to biogeosciences, particularly for turnover rate measurements. Microbial communities and their metabolism are notoriously difficult to analyze in low energy environments as biomass is exceedingly sparse and turnover rates low. Highly sensitive methods, such as liquid scintillation counting, are required to investigate low metabolic rates and conclusively differentiate them from the background noise of the respective analyzer. We conducted a series of experiments to explore the effects of luminescence, measurement time and temperature on scintillation measurements. Luminescence, the spontaneous emission of photons, disproportionally affects samples within the first few hours after sample preparation and can be minimized by following simple guidelines. Short measurement times will negatively affect liquid scintillation analysis or if background noise makes up a significant proportion of the detected events. Measurement temperature affected liquid scintillation analysis only when the temperature during the measurement reached approximately 30°C or higher, i.e. the liquid scintillation analyzer was placed in an environment without temperature control, but not in cases where chemicals were stored at elevated temperatures prior to measurement. Basic understanding on the functionality of a liquid scintillation analyzer and simple precautions prior to the measurement can significantly lower the minimum detection limit and therefore allow for determination of low turnover rates previously lost in the background noise.https://www.frontiersin.org/articles/10.3389/fmicb.2023.1194848/fullbackground measurementsliquid scintillationminimum detection limitradioisotopesbiotic fringe |
| spellingShingle | Florian Schubert Jens Kallmeyer Liquid scintillation counting at the limit of detection in biogeosciences Frontiers in Microbiology background measurements liquid scintillation minimum detection limit radioisotopes biotic fringe |
| title | Liquid scintillation counting at the limit of detection in biogeosciences |
| title_full | Liquid scintillation counting at the limit of detection in biogeosciences |
| title_fullStr | Liquid scintillation counting at the limit of detection in biogeosciences |
| title_full_unstemmed | Liquid scintillation counting at the limit of detection in biogeosciences |
| title_short | Liquid scintillation counting at the limit of detection in biogeosciences |
| title_sort | liquid scintillation counting at the limit of detection in biogeosciences |
| topic | background measurements liquid scintillation minimum detection limit radioisotopes biotic fringe |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2023.1194848/full |
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