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- Title
Novel determination of polychlorinated naphthalenes in water by liquid chromatography-mass spectrometry with atmospheric pressure photoionization.
- Authors
Moukas, Athanasios; Thomaidis, Nikolaos; Calokerinos, Antony
- Abstract
This study presents the development, optimization, and validation of a novel method for the determination of polychlorinated naphthalenes (PCNs) by liquid chromatography-atmospheric pressure photoionization (APPI), using toluene as dopant. The mass spectra of PCN 52, 54, 66, 67, 73, and 75 were recorded in negative ionization. The base ions corresponded to [M-Cl+O], where M is the analyte molecule. A strategy, which includes designs of experiments, for the development, the evaluation, and the optimization of the LC-APPI-MS/MS methods is also described. Finally, a highly sensitive method with low instrumental limits of detection (LoDs), ranging from 0.8 pg for PCN 75 to 16 pg for PCN 54 on column, was validated. A Thermo Hypersil Green PAH (100 mm × 2.1 mm, 3 μm) column was used with acetonitrile/water/methanol as mobile phase. The method was applied for the determination of the selected PCNs in surface and tap water samples. A simple liquid-liquid extraction method for the extraction of PCNs from water samples was used. Method LoQs ranged from 29 ng L, for PCN 73, to 63 ng L, for PCN 54, and the recoveries ranged from 97 to 99 %, for all congeners. This is the first LC-APPI-MS/MS method for the determination of PCNs in water samples.
- Subjects
POLYCHLORINATED naphthalenes; WATER analysis; LIQUID chromatography-mass spectrometry; ATMOSPHERIC pressure; PHOTOIONIZATION
- Publication
Analytical & Bioanalytical Chemistry, 2016, Vol 408, Issue 1, p191
- ISSN
1618-2642
- Publication type
Academic Journal
- DOI
10.1007/s00216-015-9092-5