Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) data of organic molecules in natural organic matter (NOM) for the determination of carbon stable isotope ratio

Text: Processed and quality checked DI-FT-ICR MS data for isotope analysis of organic molecules measured in ESI negative mode. Sampling and measurement conditions are described in the companion paper (Gao et al. 2025, DOI: https://doi.org/xxx).

The sample name and number (according to SI Table S1) of the respective spectrum are indicated in the sample description summary table.

The archive contains 9 ascii files, 1 Bruker .d file and 3 csv files:
- C18_mass_differ_oleic_acid_ODPA_50Da.ascii
- Caffeine_Int_differ.ascii
- Caffeine_Int_match.ascii
- Caffeine_STD_matrix.ascii
- NOM_calibration_C18H22O6_ODPA.ascii
- Oleic_acid_Int_match.ascii
- SRFA_marine_marker_C19H22O10.ascii
- SRFA_marine_marker_C20H24O9.ascii
- SRFA_marine_marker_C20H26O9.ascii
- Palmitic_acid_matrices_LC.d
- Palmitic_acid_matrices_LC_mz257.csv
- Palmitic_acid_matrices_LC_mz258.csv
- Palmitic_acid_matrices_LC_processed.csv