A. Kahmen – University of Basel – keynote speaker

Using carbon and oxygen isotopes of herbarium specimen to infer long-term physiological responses of plants to global environmental change

L. Wingate – INRAE – invited speaker

Is a ‘black box’ approach sufficient to predict the exchange of CO¹⁸O and COS between soils and the atmosphere or do we need to dig deeper?

C.A. Stricker – US Geological Survey (online)

Fat and fit: diet estimation, macronutrient assimilation, and nutritional implications for an iconic Arctic predator

M. Julien – GFZ Potsdam

Re-evaluation of the ¹³C isotope fractionation associated with fatty acids biosynthesis by position-specific isotope analysis

L. E. Daber – University of Freiburg

Position-specific isotope labelling gives new insights into chiral monoterpene synthesis

D. B. Nelson – University of Basel

Historic European monthly precipitation isotope time series reconstructions using machine learning

T. Röckmann – Utrecht University

Exploring the potential of Δ¹⁷O in CO₂ for determining mesophyll conductance

P1

C. Buchen-Tschiskale – Thünen Institute

Using N₂O isotopocule analysis and ¹⁵N tracing approach to gain insights into N₂O source processes in hydroponic tomato cultivation

P2

R. Well – Thünen Institute

Combining ¹⁵N tracing and ¹⁵N site preference of N₂O to distinguish production by nitrification and fungal denitrification

P3

F. Tamburini – ETH Zürich

Oxygen isotopes in phosphate: defining potentials and limitations for environmental studies

P4

R. A. Werner – ETH Zürich

Intramolecular ¹³C patterns of plant glucose convey environmental and metabolic information

P5

F. Damak – Tokyo Institute of Technology

Insights into nitrous oxide reduction by soybean inoculated with Bradyrhizobium from concentration and isotopocule analyses in a field

P6

S. N. Ladd – University of Freiburg

Leaf-level metabolic changes in daytime respiration and isoprenoid synthesis during drought determined by position-specific ¹³C-pyruvate labeling

P7

C. Werner – University of Freiburg

Whole ecosystem ¹³CO₂ and ²H₂O Pulse-Labelling to investigate carbon allocation, CO₂ and VOC emissions and the role of deep water reserves during drought

P8

J. Baan – University of Basel

Comparing hydrogen isotope compositions of different lipid compounds across species to address possible origin of variation

S. Kelly – IAEA – keynote speaker

Improving accessibility to food authentication, using stable isotope analysis, in developing countries: The activities of the joint FAO/IAEA Centre’s food safety and control laboratory

M. Straub – University Hospital of Lausanne – invited speaker

Distinct nitrogen isotopic compositions of healthy and cancerous tissue in mice brain and head & neck micro-biopsies

M. Perini – Centro di Trasferimento Tecnologico

Stable isotope ratio analysis to assess pharmaceuticals, cosmetics and dietary supplements authenticity

H. Meijer – University of Groningen

First Use of Triply Labelled Water analysis for energy expenditure measurements in mice

P9

C. Citérin – Nantes Université

Isotopic signature of ¹³C and ¹⁵N natural abundance in breast cancer patients

P10

M. Couton – Nantes Université

¹⁵N-position-specific isotope analysis by isotope ratio mass spectrometry (PSIA-IRMS)

P11

M. Perini – Centro di Transferimento Technologico

Isotope ratio mass spectrometry to detect differences in four compartments of Simmental cows fed on C3 and C4 diets

P11/2

P. Paneth – Lodz University of Technology

The first oxygen stable isotopes assessment in ‘in vivo’ cancer tissues – a pilot study.

K. Świderek – Universitat Jaume I – keynote speaker

Towards a new protocol for computer assisted biocatalysts design

P. Paneth – Lodz University of Technology – invited speaker

My 50 years with isotope effects

V. Moliner – Universitat Jaume I

Towards the design of an improved Retro-Aldolase based on QM/MM studies of the reaction catalyzed by different protein scaffolds

I. H. Williams – University of Bath

Computational simulation of kinetic isotope effects for enzymatic N-glycoside hydrolysis

P12

L. Chai – TU Munich

Metabolic mechanism of sulfonamide cleavage: a combined computational and experimental study on sulfamethoxazole

P13

A. Dybala-Defratyka – Lodz University of Technology

Isotope effects on vaporization of organic compounds from aqueous solution – insight from experiment and computations

P14

L. Pennacchio – University of Copenhagen

First principles model of isotopic fractionation in formaldehyde photolysis: Wavelength and pressure dependence

A. Gilbert – Tokyo Institute of Technology – keynote speaker

Isotopologues of organic molecules: method developments and applications

C. Neubauer – University of Colorado – invited speaker

Discovering isotopic fingerprints anew on bioanalytical mass spectrometers

C. Rennick – National Physical Laboratory (online)

Calibration of Boreas: a new laser-based instrument for in-situ automated measurement of δ¹³C and δ²H in methane

T. Csernica – California Institute of Technology

High-Dimensional Isotomics: Observation and Interpretation of Over 100 Isotopic Constraints on Methionine

R. G. H. Marks – University of Essen

How to Couple LC-IRMS with HRMS – A Proof-of-Concept Study

S. Renou – University of Nantes

Towards unbiased ¹³C isotopic composition in PSIA

B. Tuzson – Empa

Mid-infrared laser spectroscopy coupled to continuous sublimation extraction. A novel method for high-precision greenhouse gas measurements in ice cores

P15

F. Antritter – TU Munich

Reducing the unwanted: selectivity of various solid phase extraction sorbents in relation to dissolved organic matter

P16

A. Canavan – TU Munich

Position-specific isotope analysis using ¹³C-labels on sulfamethoxazole

P17

A. Tafa – TU Munich

Suitability of passive sampling for compound-specific isotope analysis of micropollutants in aquatic environments

P18

R. Bakkour – TU Munich

Universal vs. selective sorbents for targeted isotope analysis of aquatic contaminants

P19

C. Wabnitz – TU Munich

Coupling a quartz crystal microbalance with liquid chromatography for online NOM monitoring

P20

S. Leitner – Institute of Soil Research

A UAV-based sampling system to analyze greenhouse gases and volatile organic carbons encompassing compound specific stable isotope analysis

P21

E. P. Mueller– California Institute of Technology

High-precision ESI-Orbitrap MS measurements of hydrogen isotope compositions from organic molecules

P22

A. Hilkert – Institute of Soil Research

Comprehensive isotope ratio MS with electrospray-Orbitrap

P23

M. Öztopark – Royal Netherlands Institute for Sea Research

Investigating the intramolecular isotopic structure of isoprenoids via ultra high resolution APCI - Orbitrap mass spectrometry

P24

G. S. Remaud – Nantes University

Exploring the potential of ¹⁷O NMR for intramolecular ¹⁷O isotope profile: application to vanillin origin discrimination

P25

S. Renou – Nantes University

How to determine the intramolecular ¹³C composition on low amount of glucose using irm ¹³C-NMR

P26

R. P. J. Moonen – Utrecht University

First results of CO₂ and H₂O Isotope-Flux Measurements a semi-arid area with large scale irrigation

P27

G. A. Adnew – Utrecht University

Temperature dependence of isotopic fractionation in the CO₂-O₂ isotope exchange reaction

P28

E. Safi – National Physical Laboratory

Fractionation effects during methane separation from ambient air for high-precision optical analysis of δ¹³C and δ²H

P29

A. Th. Aerts-Bijma – University of Gröningen

Where do IRMS’s go wrong? δ¹⁸O SLAP determined at -56.3‰

P30

K. Huang – Empa

A novel automated technique for simultaneous online analysis of ¹⁵N in ammonium, nitrite, and nitrate

P31

K. Zeyer – Empa

Real-time analysis of δ¹³C- and δD-CH₄ in ambient air with a QCL based absorption spectrometer: Method development

P32

M. Lehmann – WSL

The hydrogen isotopic composition of plant carbohydrates – Advancement in methods and interpretation

P33

S. Hugger – University of Basel

Method optimization for plant sugar purification and compound-specific hydrogen isotope analysis

P33/2

S. G. Pati – University of Basel

P58

δ-scale calibration for stable isotope analysis of O₂ by continuous flow IRMS from -10 to +95 ‰ with in-vitro photosynthesis experiments

J. Fiebig – Goethe University of Frankfurt – keynote speaker

Benefits and perspectives of carbonate dual clumped isotope thermometry

M. Clog – University of Glasgow – invited speaker

Robustness of clumped carbonate thermometry in carbonates from the Tara Deep, a large Irish orebody

M. Sivan – Utrecht University

Characterization of microbial methane using clumped isotope measurements

J. Quade – University of Arizona

Carbonate clumped isotope calibration from 6 to 1100°C using an isotope ratio laser spectrometer based on tunable infrared laser spectroscopy

P34

A. Nataraj – Empa

Quantum cascade laser absorption spectrometer with a low temperature multipass cell for precision clumped ¹²C¹⁸O₂ and position specific isotope analysis

P35

I. Prokhorov – Empa

Concordant optical clumped isotope thermometry of methane

P36

H. Eckhardt – University of Heidelberg

Atmospheric CO₂ sources with specific Δ₄₇ signals under mixing conditions

P37

N. Looser – ETH Zürich

Clumped isotope reordering in belemnite and optical calcites: Towards material-specific reordering kinetics

P38

N. Zhang – Tokyo Institute of Technology

Abiotic methane formation in nature: information from clumped isotope analysis of laboratory synthesized methane

Y. Ueno – Tokyo Institute of Technology – keynote speaker

Tracing oxygen in sulfate using ³⁴S-¹⁸O-clumping

J. Hemingway – ETH Zürich – invited speaker

Interpreting triple-oxygen isotope compositions in the geologic sulfur cycle

I. Bobrovskiy – GFZ Potsdam

Compound-specific isotope analysis on phylogenetically specific molecular fossils as a tool to deconvolve the stable carbon isotope record of the deep time

M. H. Thiemens – University of California San Diego

Solar controls of radioactive sulfur isotopes

P39

L. Liu – Australian National University

SHRIMP-SI quadruple sulfur isotopic compositions of two generations of pyrite in the 3.49 Ga dresser formation

S. Ono – MIT – keynote speaker

A model for isotopologue signatures of microbial methane to improve source attributions

L. Yu – Tsingua University / Empa – invited speaker (online)

Constraining global N₂O budgets with decadal trends of multiple isotope signatures

A. Matson – Thünen Institute (announcement)

Research Gate Discussion Group: Isotopic tools to study N₂O in soil and aquatic systems

R. Hill-Pearce – National Physical Laboratory (online)

Stable isotope reference materials for climate change monitoring

P. M. Homyak – University of California Riverside

Using isotopes to understand N-limitation in dry lands: Unexpected N loss pathways in systems with too little N

A. Hoheisel – University of Heidelberg

Evaluation of six years of continuous δ¹³CH₄ measurements in Heidelberg, Germany

R. W. van Zwieten – Picarro, Inc. (sponsored)

Committed to Science - Stable isotope analysis with CRDS – practical considerations and use cases

J. Kaiser – University of East Anglia

Polyisotopic carbon dioxide ratios at the coastal Weybourne Atmospheric Observatory (Norfolk, UK)

S. L. Baartman – Utrecht University

Isotopic measurements of carbonyl sulfide (COS): from biosphere to stratosphere

H. Bao – Nanjing University

Atmospheric sulfate of prehuman time in inland northern China

P40

H. A. Scheeren – University of Gröningen

Measuring the stable isotopic composition of pure CO₂ samples on a dual-laser absorption spectrometer using a back-dilution method to obtain dry ambient conditions

P41

P. M. Steur – University of Gröningen

A four-year record (2017-2021) of ∆¹⁷O in atmospheric CO₂ from Lutjewad station (NL)

P42

M. Fatima – VTT

Comparison of laser sources and driver electronics for optical isotope ratio spectroscopy

P43

S. Toyoda – Tokyo Institute of Technology

Spacio-temporal distributions of atmospheric nitrous oxide and its isotopocules

P44

A. Matson – Thünen Institute

Research Gate Discussion Group: Isotopic tools to study N2O in soil and aquatic systems

K. L. Casciotti – Stanford University – keynote speaker

Tracing nitrous oxide biogeochemistry in marine oxygen deficient zones using isotopes and isotopomers

C. L. Kelly – Stanford University

Identifying a potentially variable site preference for hybrid nitrous oxide production via isotopomer labeling experiments

E. Harris – ETH Zürich

Denitrifying pathways dominate nitrous oxide emissions from managed grassland during drought and rewetting

B. Mayer – University of Calgary

Isotopic tracing of sources and fate of nitrate, sulfate and methane in groundwater in Alberta (Canada)

B. Wolf – Karlsruhe Institute of Technology

Intramolecular N₂O isotopic composition from grassland without preconcentration: interferences correction, nitrification inhibitors, freeze-thaw events and source process identification

A. Danner & G. Rahe – Envicontrol (sponsored)

Analysis of soil respiration with OA-ICOS technology

D. Hunkeler – University of Neuchatel – keynote speaker

Does compound-specific isotope analysis contribute to a new conceptual understanding of the fate of contaminants in the environment?

M. Wiggenhauser – ETH Zürich

Fractionation of stable isotopes of metals and metalloids in plants - copper and cadmium as examples

S.-L. Badea – ICSI

Dehalogenation of α-hexachlorocyclohexane by iron sulfide nanoparticles: Study of reaction mechanism with stable carbon isotopes and pH variations

P. R. Martin – University of Tübingen

Manganese–driven oxidation of aminotris (methylene) phosphonate (ATMP) studied by carbon CSIA

S. G. Pati – University of Basel

Oxygen kinetic isotope effects associated with reactions of singlet oxygen in aqueous solutions

C. E. Bopp – EAWAG

Tracing mechanistic adaptations of enzymatic oxygenations of aromatic contaminants using ¹³C and ¹⁸O kinetic isotope effects

J. Hayles – NASA (online)

Constraints on triple oxygen isotope kinetics

M. Elsner – Technical University of Munich

Isotope fractionation reveals limitations and microbial regulation of pollutant biodegradation at low concentrations

P45

K. Müller – TU Munich

Applicability of a reverse stable isotope labeling approach to show biodegradation of microplastics on a single-cell level

P46

A. Matson – Thünen Institute

Using depth profiles and natural abundance stable isotopes to determine N₂O processes in agricultural soils

P47

K. Kourtaki – University of Tübingen

Application of compound-specific carbon isotope analysis on aerobic biotransformation of glyphosate

P48

A. Röhnelt – University of Tübingen

Heterogenous oxidation of aminopolyphosphonates and AMPA at manganese oxide surfaces studied by carbon LC-IRMS

P49

O. Boukaroum – Aix-Marseille University

Significant ²H and ¹³C isotope fractionation during volatilisation and diffusion of hydrocarbons in soil

P50

P. Höhener – Aix-Marseille University

DECiSIvE - Tracking degradation of soil pollutants with multi-elemental compound-specific isotope analysis

P51

M. Alvarez-Salas – ETH Zürich

Stable isotopes of oxygen: the key to understand the soil fate of fertilizer-derived phosphorus?

P52

E. Stoll – University of Innsbruck

New insights into climate change-driven soil N₂O production and emissions in managed montane grassland

P53

M. Vinyes-Nadal – University of Barcelona

Assessing methoxychlor contamination and natural attenuation in a polluted aquifer using carbon compound specific isotope analyses

P54

D. Lewicka-Szczebak – University of Wrocław

Combining isotope mixing and fractionation with a new modelling tool applying the Monte Carlo approach

P55

M. Bucha – University of Wrocław

Tracing anaerobic decomposition of lactate, butyrate, propionate, and acetate by means of carbon isotopic analyses of products CH₄, CO₂, and DIC in the continuous-flow open systems

P56

P. M. Magyar – University of Basel

Constraining interplay between kinetic and equilibrium isotope effects during anammox in a wastewater treatment system

P57

T. Einzmann – University of Basel

Understanding biogeochemical controls on nitrous oxide production and consumption in Lake Lugano, Switzerland

P58

S. G. Pati – University of Basel

P33/2

δ-scale calibration for stable isotope analysis of O₂ by continuous flow IRMS from -10 to +95 ‰ with in-vitro photosynthesis experiments

P59

C. F. M. de Carvalho – University of Basel

Oxygen isotope fractionation during enzymatic O₂ consumption reactions

P60

T. Kuder – University of Oklahoma

Hydrogen isotope exchange between trichloroethene and water under mild environmental conditions – implications for the use of hydrogen CSIA in contaminated site assessment

P61

N. Gluschankoff – Stanford University

Isotopic analysis of nitrous oxide during El Niño and La Niña in the Eastern tropical South Pacific

P62

J. Mohn – Empa

Tracing N₂O formation in full-scale wastewater treatment with natural abundance isotopes