Isotopic analysis of ethanol: study on ¹⁸O/¹⁶O measurement using a high‐temperature pyrolysis system coupled to an isotope ratio mass spectrometer

Oxygen‐18 measurement of Andalusian olive oils by continuous flow pyrolysis/isotope ratio mass spectrometry

“…The results of our participation in an 18 O‐ring test for the isotopic determination of ethanol26 confirmed that our equipment was operating properly.…”

Cavity ring‐down spectroscopy versus high‐temperature conversion isotope ratio mass spectrometry; a case study on δ2H and δ18O of pure water samples and alcohol/water mixtures

“…Next, the same wine samples were directly injected into the evaporator of the CRDS system. Here, the initial experiments were not very encouraging; the results seemed to be far away from reality as is partially known from earlier studies (see for instance Calderone et al 17 and Breas et al 18 ). In addition, after trying to coarsely model the mass spectrometric bulk results in an attempt to estimate reasonable d-values of wine-H 2 O, the results from the CRDS measurements remained far outside the expected range.…”

“…Table 2 confirms the excellent comparability of water stable isotope c Using a gas-tight syringe (10 mL; SGE, Ringwood, Australia; part number 02987). d 17 O/ 16 O may also be available in the future; there is a small absorption in the vicinity, but precision may not be sufficient to study the small 17 O anomalies occurring in atmospheric water samples. e We have tried to elucidate the origin of the remaining memory by enhancing the evaporator temperature from 140 to 1908C.…”

Determination of hydrogen, carbon and oxygen isotope ratios of ethanol in aqueous solution at millimole levels

“…These standards were distributed from the JRC to twelve laboratories for an international collaborative study that was intended to determine the 18 O/ 16 O ratio of ethanol through pyrolysis IRMS methods. 17 The remaining authentic standards of ethanol were provided by the Alcohol SPME procedure SPME was conducted in the following manner using an 85-mm fiber coated with carboxen/polydimethlsiloxane (Carboxen/PDMS stableFlex TM ; Supelco, Bellefonte, PA, USA). The SPME fiber was immersed into 4 mL of aqueous solution in a 4 mL vial through a Teflon septum.…”