Simple multi-residue analysis of persistent organic pollutants and molecular tracers in atmospheric samples.
MethodsX
; 10: 102224, 2023.
Article
en En
| MEDLINE
| ID: mdl-37251654
ABSTRACT
We present a simple, selective and sensitive analytical method to quantitatively determine a wide range of halogenated persistent organic pollutants and molecular tracers in atmospheric samples. Identification and quantification was carried out by high-resolution gas chromatography, hyphenated with low-resolution mass spectrometry operating in electron impact (EI) and electron capture negative ionization (ECNI) mode. Optimization on a number of instrumental parameters was conducted to obtain ultra-trace detection limits, in the range of few fg/m3 for organohalogen compounds. Repeatability and reproducibility of the method was thoroughly evaluated. The analysis was validated with standard reference materials and successfully applied to actual atmospheric samples. The proposed multi-residue method provides a precise, affordable and practical procedure of sample analysis for environmental research laboratories with conventional instrumentation on a routine basis.â¢A simple combination of alumina, florisil and silica gel adsorbents was applied to sufficiently isolate polychlorinated biphenyls, organochlorine pesticides, polycyclic aromatic hydrocarbons, long chain n-alkanes, hopanes and steranes.â¢Full elution was achieved in two successive fractions, using small volumes of n-hexane and n-hexane/dichloromethane to recover all target substances.â¢To maximize analytical response, optimization was applied for three operating parameters in ECNI mode i) ion source temperature; ii) emission current; and iii) electron energy.
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1
Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
MethodsX
Año:
2023
Tipo del documento:
Article
País de afiliación:
Chipre