%0 Journal Article 
%A Torres Herrera, Sandra
%A González Cortés, José Joaquín
%A Almengló Cordero, Fernando
%A Ramírez Muñoz, Martín
%A Cantero Moreno, Domingo
%T Development and validation of a sampling and analysis method to determine biogenic sulfur in a desulfurization bioreactor by gas chromatography coupled with a pulsed flame photometric detector (GC-PFPD).
%D 2022
%@ 1873-3336
%U http://hdl.handle.net/10498/25885
%X Suspended biomass bioreactors can be operated to remove H2S from biogas under anoxic conditions and produce elemental sulfur, the commercial value of which has been demonstrated. In the present paper, a novel methodology comprising the optimization of a determination method performed in a gas chromatograph equipped with a pulsed flame photometric detector (GC-PFPD), combined with a simple preparation based on filtration and extraction with toluene, is proposed. The injector temperature and carrier gas flow rate (QHe) values were optimized using a response surface methodology based on a face-centred composite central design. This optimization revealed that the optimum conditions were an injector temperature and carrier gas flow rate of 222°C and 7mLmin-1, respectively. The chromatographic method shows an analysis time of 48min, a detection limit of more than 5.9mgL-1, a relative standard deviation of less than 3.71%, and a sulfur recovery percentage of more than 98%. These values provide excellent linearity and a reasonable concentration range (10-200mgL-1). Finally, a measurement error of 4.45% was obtained when using the present method in a selectivity test.
Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.
%K Biogenic sulfur
%K GC-PFPD
%K Toluene
%K Filtration
%K Response surface methodology (RSM)
%~ Universidad de Cádiz