Felix Niemann
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View article: LC‐IRMS Persulfate Oxidation: Case Study on Neonicotinoid‐Related Structures
LC‐IRMS Persulfate Oxidation: Case Study on Neonicotinoid‐Related Structures Open
Rationale Liquid chromatography‐isotope ratio mass spectrometry (LC‐IRMS) is used to analyze stable carbon isotope ratios of polar nonvolatile compounds. However, challenges with the persulfate‐based oxidation interface have been reported,…
View article: Alkaline persulfate oxidation as an intermediate step for the development of a wet chemical oxidation interface for compound-specific δ15N analysis by LC-IRMS
Alkaline persulfate oxidation as an intermediate step for the development of a wet chemical oxidation interface for compound-specific δ15N analysis by LC-IRMS Open
View article: A Proof‐of‐Principle Study for <i>δ</i> <sup>15</sup> N Measurements of Aqueous Dissolved Nitrate With a Modified LC‐IRMS Interface
A Proof‐of‐Principle Study for <i>δ</i> <sup>15</sup> N Measurements of Aqueous Dissolved Nitrate With a Modified LC‐IRMS Interface Open
Rationale The analysis of nitrogen isotopes in aqueous dissolved nitrate is an effective method for identifying pollution sources and offers the potential to study the nitrogen cycle. However, the measurement of nitrogen isotope ratios of …
View article: A proof-of-principle study for δ15N measurements of aqueous dissolved nitrate and nitrite with a modified LC-IRMS interface
A proof-of-principle study for δ15N measurements of aqueous dissolved nitrate and nitrite with a modified LC-IRMS interface Open
The analysis of nitrogen isotopes in aqueous dissolved nitrate is an effective method for identifying pollution sources and offers the potential to study the nitrogen cycle. However, the measurement of nitrogen isotope signatures of nitrat…
View article: Differentiating between Acidic and Basic Surface Hydroxyls on Metal Oxides by Fluoride Substitution: A Case Study on Blue TiO<sub>2</sub> from Laser Defect Engineering
Differentiating between Acidic and Basic Surface Hydroxyls on Metal Oxides by Fluoride Substitution: A Case Study on Blue TiO<sub>2</sub> from Laser Defect Engineering Open
Both oxygen vacancies and surface hydroxyls play a crucial role in catalysis. Yet, their relationship is not often explored. Herein, we prepare two series of TiO 2 (rutile and P25) with increasing oxygen deficiency and Ti 3+ concentration …
View article: Unterscheidung zwischen sauren und basischen Oberflächenhydroxylgruppen auf Metalloxiden durch Fluoridsubstitution: Eine Fallstudie am Beispiel von defektreichem, blauem TiO<sub>2</sub> aus der laserbasierten Defekterzeugung
Unterscheidung zwischen sauren und basischen Oberflächenhydroxylgruppen auf Metalloxiden durch Fluoridsubstitution: Eine Fallstudie am Beispiel von defektreichem, blauem TiO<sub>2</sub> aus der laserbasierten Defekterzeugung Open
Sowohl oberflächennahe Sauerstofffehlstellen als auch Hydroxylgruppen an der Oberfläche spielen eine entscheidende Rolle in der Katalyse. Dennoch bleiben die genauen Zusammenhänge durch die limitierte analytische Zugänglichkeit dieser Stru…