Baseline isotopic data of polyhalogenated compounds

Compound specific isotope analysis of hexachlorocyclohexane isomers: a method for source fingerprinting and field investigation of in situ biodegradation

“…2 Supplementary Table S4 (Supporting Information). Badea et al [22] and Vetter et al [24] found quite a tight cluster of δ 13 C values for the three DNAPL α-HCH samples that they reported (-27.3 to -25.9‰) and one α-HCH δ 13 C value of -31.7‰. In contrast, the results of this study that included a larger range of HCH sources show significantly more source variation in α-HCH ( Fig.…”

“…Badea et al . and Vetter et al . found quite a tight cluster of δ 13 C values for the three DNAPL α‐HCH samples that they reported (–27.3 to –25.9‰) and one α‐HCH δ 13 C value of –31.7‰.…”

“…[21] Badea et al [22] reported δ 13 C values for three α-HCH Dense Non-Aqueous Phase Liquid (DNAPL) samples from field sites, which ranged from -27.4 to -25.8‰ [22] ; whereas Drenzek et al [23] measured a δ 13 C value of -26.3‰ for a pure γ-HCH sample obtained from Supelco (Bellefonte, PA, USA). Vetter et al [24] obtained δ 13 C values of -26.7 to -25.9‰ for β-, δ-, and γ-HCH isomers obtained from Riedel-de-Haen (Seelze, Germany) and -31.7‰ for α-HCH from the same supplier; they also measured a value of -25.6 ‰ for samples from another two suppliers of γ-HCH (the Institute of Organic Industrial Chemistry, Warsaw, Poland, and Merck, Darmstadt, Germany). [25] A more thorough investigation of δ 13 C signatures for HCH sources and isomers is necessary to determine whether a wider range of manufacturers produces HCHs with substantially different δ 13 C values, possibly due to different manufacturing processes and/or chemical feedstocks.…”

“…measured a δ 13 C value of –26.3‰ for a pure γ‐HCH sample obtained from Supelco (Bellefonte, PA, USA). Vetter et al . obtained δ 13 C values of –26.7 to –25.9‰ for β‐, δ‐, and γ‐HCH isomers obtained from Riedel‐de‐Haen (Seelze, Germany) and –31.7‰ for α‐HCH from the same supplier; they also measured a value of –25.6 ‰ for samples from another two suppliers of γ‐HCH (the Institute of Organic Industrial Chemistry, Warsaw, Poland, and Merck, Darmstadt, Germany) .…”

Optimization of on‐line hydrogen stable isotope ratio measurements of halogen‐ and sulfur‐bearing organic compounds using elemental analyzer–chromium/high‐temperature conversion isotope ratio mass spectrometry (EA‐Cr/HTC‐IRMS)

“…Chromium‐based techniques were first applied for the conversion of water into hydrogen gas . For halogenated organic compounds, pyrolytic liberation of H 2 in the presence of hot chromium was first described in pioneering articles by Armbruster et al and Vetter et al However, the previously applied chromium reactor design and the prescribed conversion temperature of 1050°C generated inconsistent H 2 yields. Furthermore, the measured δ 2 H values could not be properly calibrated in the absence of suitable hydrogen stable isotopic reference materials.…”