Compound specific isotope analysis (CSIA) of phthalates and non-targeted isotope analysis (NTIA) of SPE-extractable organic carbon in dilute aquatic environments

Fiedziukiewicz, Marcin; Hanley, Quentin S.

doi:10.1016/j.envadv.2021.100050

Cited by 7 publications

(1 citation statement)

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“…The identi cation of dominant source of phthalates can be implemented by measuring the content of stable carbon isotopes 12 C and 13 C in phthalate composition. Taking into account the proceeding of biosynthesis under the kinetic isotope effect, which, in combination with the metabolic isotope effect, leads to the formation of secondary metabolites including phthalates in which a reduced content of carbon 13 C isotope is observed (Fiedziukiewicz et al 2021;Blessing and Baran 2022). The isotopic ngerprint of a chemical compound allows to put forward an assumption on the natural/industrial origin of the detected phthalate.…”

Section: Introductionmentioning

confidence: 99%

Assessment of stable carbon isotope 13С/12С ratio in phthalates from surface waters using HPLC-HRMS-TOF approach

Kuzmin

Grigoryeva

Горшков

2023

Environ Sci Pollut Res

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A method for estimating of the ratio of stable carbon isotopes 13 С/ 12 С in the composition of phthalates from surface water at a trace concentration level is proposed. It is based on the concentration of hydrophobic components of water using an analytical reversed phase HPLC column followed by their gradient separation and detection of eluted phthalates using a high-resolution time-of-ight mass spectrometry (HRMS-TOF) in the form of molecular ions. The ratio of stable carbon isotopes 13 С/ 12 C in phthalates is calculated as a ratio of the peak areas of the monoisotopic masses [M + 1 + H] + and [M + H] + . Commercial phthalates, di-n-butyl phthalate (DnBP) and di-(2-ethylhexyl) phthalate (DEHP), were used as standards. The minimal concentration of DnBP and DEHP in water required for a reliable determination of δ 13 C value is estimated by the level of ca. 0.2 µg L − 1 . The technique has been veri ed during the monitoring of priority phthalates in the waters of Lake Baikal.

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Section: Introductionmentioning

confidence: 99%