Determination of SCFAs in water using GC-FID. Selection of the separation system.
Anal Chim Acta
; 716: 24-7, 2012 Feb 24.
Article
em En
| MEDLINE
| ID: mdl-22284873
ABSTRACT
In the present study, an analytical procedure was developed for the determination of short-chain fatty acids (SCFAs) in landfill leachate and municipal wastewater employing injection of aqueous samples to gas chromatograph with flame ionization detector (GC-FID). Chromatographic conditions such as a separation system, injection volume, oven temperature program were investigated and selected. With two columns, one with a polar (polyethylene glycol) and one with a non-polar (dimethylpolisiloxane) stationary phase, good separation of SCFAs, containing from 2 to 8 carbon atoms, was achieved. The sample volume was 2 µL and the temperature program 80°C (30 s) then 7 °C min(-1) to 220 °C (2 min). LOQs values were below 0.25 mg L(-1). The concentrations of the acids in the landfill leachate studied ranged from 0.45±0,059 (average ± extended uncertainty) mg L(-1) for pentanoic acid to 15.2±0.73 mg L(-1) for ethanoic acid. Concentrations of SCFAs in the municipal wastewater were lower than LOQs.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Água
/
Ácidos Graxos Voláteis
/
Ionização de Chama
Idioma:
En
Revista:
Anal Chim Acta
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Polônia