Determination of o-phthalic acid esters in water by chromatography–mass spectrometry with emulsion dispersive liquid–liquid microextraction preconcentration
- Authors: Krylov V.A.1, Nesterova V.V.1
-
Affiliations:
- Nizhny Novgorod State University
- Issue: Vol 71, No 8 (2016)
- Pages: 777-785
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/181951
- DOI: https://doi.org/10.1134/S1061934816080098
- ID: 181951
Cite item
Abstract
Using emulsion dispersive liquid–liquid microextraction preconcentration and injection of a large volume of an extract (10 μL), the limits of chromatographic–mass spectrometric detection of o-phthalic acid esters in water have been attained at the level 4 × 10–6–1 × 10–5 mg/L. The main source of the systemic error of the determination of impurities was found to be the release of o-phthalates from microparticles of chromatographic septum to the carrier gas. The extractant (n-octane) was purified by Rayleigh distillation. The independence of the concentration coefficient of the studied o-phthalates of concentration in the range (0.4–30) × 10–4 mg/L has been demonstrated. The relative expanded uncertainty of the determination of o-phthalates has been calculated and equals 12–39%.
About the authors
V. A. Krylov
Nizhny Novgorod State University
Author for correspondence.
Email: k658995@mail.ru
Russian Federation, pr. Gagarina 23, Nizhny Novgorod, 603950
V. V. Nesterova
Nizhny Novgorod State University
Email: k658995@mail.ru
Russian Federation, pr. Gagarina 23, Nizhny Novgorod, 603950