Niklas Karbach
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View article: CID fragment annotation from data-independent experiments in non-target organic aerosol analysis: presenting an easy-to-use tool
CID fragment annotation from data-independent experiments in non-target organic aerosol analysis: presenting an easy-to-use tool Open
The open-source tool presented in this work provides a simple, reliable, and comprehensive method for analyzing and annotating CID fragments of precursor ions in data-independent full MS/AIF experiments in non-targeted HPLC-UHRMS analyses …
View article: VOLCANO <sub>3</sub> – A Miniaturized Chemiluminescence Ozone Monitor for Drone-Based Measurements in Volcanic Plumes
VOLCANO <sub>3</sub> – A Miniaturized Chemiluminescence Ozone Monitor for Drone-Based Measurements in Volcanic Plumes Open
High levels of bromine monoxide (BrO) observed in volcanic plumes indicate significant catalytic destruction of tropospheric ozone (O3) at local to regional scales. The underlying chemical mechanisms are still poorly understood and the qua…
View article: Application example of a novel untargeted LC-UHRMS processing approach for the analysis of organic aerosols
Application example of a novel untargeted LC-UHRMS processing approach for the analysis of organic aerosols Open
Atmospheric organic aerosol contains unique information about the origin, reaction regimes and the atmospheric conditions of the air mass that is sampled. Extracting the maximum amount of information from every sample can be a challenging …
View article: Development and use of a lightweight sampling system for height-selective drone-based measurements of organic aerosol particles
Development and use of a lightweight sampling system for height-selective drone-based measurements of organic aerosol particles Open
Organic aerosols (OA) are introduced into the atmosphere from a variety of natural or anthropogenic sources. Especially in the sub micrometer range, the organic fraction contributes to a large proportion of the particle mass and thus has a…
View article: Preparation of low-concentration H <sub>2</sub> test gas mixtures in ambient air for calibration of H <sub>2</sub> sensors
Preparation of low-concentration H <sub>2</sub> test gas mixtures in ambient air for calibration of H <sub>2</sub> sensors Open
Using electrochemical gas sensors for quantitative measurements of trace gas components in ambient air introduces several challenges, of which interference, drift and aging of the sensor are the most significant. Frequent and precise calib…
View article: Preparation of low concentration H <sub>2</sub> test gas mixtures in ambient air for calibration of H <sub>2</sub> sensors
Preparation of low concentration H <sub>2</sub> test gas mixtures in ambient air for calibration of H <sub>2</sub> sensors Open
Using electrochemical gas sensors for quantitative measurements of trace gas components in ambient air introduces several challenges, of which interference, drift and aging of the sensor are the most significant. Frequent and precise calib…
View article: Development of a drone-based measurement system for real-time monitoring of volcanic gas composition
Development of a drone-based measurement system for real-time monitoring of volcanic gas composition Open
Studying volcanic gas emissions is an important method to obtain information about volcanic systems and providing insight into magmatic processes. MultiGAS instruments allow to measure SO2 and CO2, alongside meteorological data which are i…
View article: Development of a non-targeted LC-UHRMS approach for organic aerosol analysis: first application to urban and biogenically influenced air masses
Development of a non-targeted LC-UHRMS approach for organic aerosol analysis: first application to urban and biogenically influenced air masses Open
The analysis of filter samples of atmospheric organic aerosols provides information about atmospheric processes and the origin of aerosol particles. However, limiting analysis to a few target compounds ignores a large proportion of the com…
View article: Reliable Ozone Measurements in Volcanic Plumes: A Way to Resolve the Volcanic Ozone Enigma
Reliable Ozone Measurements in Volcanic Plumes: A Way to Resolve the Volcanic Ozone Enigma Open
In addition to CO2 and sulphur dioxide (SO2), volcanic plumes also contain reactive halogen species. Bromine monoxide (BrO) can reliably be quantified by remote sensing measurements and is known to catalyse ozone (O3) destruction. Therefor…
View article: Halogen activation in volcanic plumes: Studies at Mt Etna (Italy) 2022 and 2023
Halogen activation in volcanic plumes: Studies at Mt Etna (Italy) 2022 and 2023 Open
Halogens in volcanic plumes are important for both volcanic and environmental research. For example, changes in the composition of the volcanic plume can be an indication of changes in the activity of the volcano. Volcanic emissions consis…
View article: Past fire dynamics inferred from polycyclic aromatic hydrocarbons and monosaccharide anhydrides in a stalagmite from the archaeological site of Mayapan, Mexico
Past fire dynamics inferred from polycyclic aromatic hydrocarbons and monosaccharide anhydrides in a stalagmite from the archaeological site of Mayapan, Mexico Open
Speleothems (cave stalagmites) contain inorganic and organic substances that can be used to infer past changes in local and regional paleoenvironmental conditions. Specific biomarkers can be employed to elucidate the history of past fires,…
View article: Comment on bg-2023-63
Comment on bg-2023-63 Open
Abstract. Speleothems (cave stalagmites) contain inorganic and organic substances that can be used to infer past changes in local and regional paleoenvironmental conditions. Specific biomarkers can be employed to elucidate the history of p…
View article: Past fire dynamics inferred from polycyclic aromatic hydrocarbons and monosaccharide anhydrides in a stalagmite from the archaeological site of Mayapan, Mexico
Past fire dynamics inferred from polycyclic aromatic hydrocarbons and monosaccharide anhydrides in a stalagmite from the archaeological site of Mayapan, Mexico Open
Speleothems (cave stalagmites) contain inorganic and organic substances that can be used to infer past changes in local and regional paleoenvironmental conditions. Specific biomarkers can be employed to elucidate the history of past fires,…
View article: Supplementary material to "Past fire dynamics inferred from polycyclic aromatic hydrocarbons and monosaccharide anhydrides in a stalagmite from the archaeological site of Mayapan, Mexico"
Supplementary material to "Past fire dynamics inferred from polycyclic aromatic hydrocarbons and monosaccharide anhydrides in a stalagmite from the archaeological site of Mayapan, Mexico" Open
Cave survey and stalagmite sample MAYA-22-7Because only very rough scetch maps were available, our team surveyed part of Cenote Ch'en Mul in August 2022 (Fig. S1).The cenote is in direct vicinity to the Kukulcan temple and the observatory …
View article: Rapid gas measurements in volcanic plumes with UAVs: online and offline measurements of various trace gases with light UAVs
Rapid gas measurements in volcanic plumes with UAVs: online and offline measurements of various trace gases with light UAVs Open
To protect people and infrastructures in the immediate vicinity of active volcanoes, monitoring the gas composition of the emitted plume is crucial. In order to react quickly to sudden changes in this composition, frequent measurements are…
View article: Detection of chlorine, bromine and bromine chloride (BrCl) in volcanic emissions: Studies at Mt. Etna (Italy), 2022
Detection of chlorine, bromine and bromine chloride (BrCl) in volcanic emissions: Studies at Mt. Etna (Italy), 2022 Open
Halogens in volcanic plumes are important for both volcanic and environmental research. For example, changes in the composition of the volcanic plume can be an indication of changes in the activity of the volcano. Volcanic emissions consis…
View article: Observing volcanoes with drones: studies of volcanic plume chemistry with ultralight sensor systems
Observing volcanoes with drones: studies of volcanic plume chemistry with ultralight sensor systems Open
The study of the chemical composition of volcanic emissions is an important method for obtaining information about volcanic systems and providing indirect and unique insights into magmatic processes. However, there is a non-negligible risk…
View article: Halogen measurements with in-situ sampling techniques: Studies at Vulcano and Mt. Etna (Italy)
Halogen measurements with in-situ sampling techniques: Studies at Vulcano and Mt. Etna (Italy) Open
<p>Halogens in volcanic plumes are important for both volcanic and environmental research. For example, changes in the composition of the volcanic plume can be an indication of changes in the activity of the volcano. In addition to e…
View article: Chemical characterization of volcanic plumes with multifunction UAVs and extra-lightweight drones: Concepts and first applications
Chemical characterization of volcanic plumes with multifunction UAVs and extra-lightweight drones: Concepts and first applications Open
<p>Investigating the chemical composition of volcanic plumes is an important method for obtaining geochemical information of volcanic systems, determining the environmental impact of volcanic outgassing and providing indications of i…