Data/hora: 06/06/2024 11:44:31

Provedor de dados: 	5	
País: 	France	
Título: 	Analysis of hydrogen and methane in seawater by “Headspace” method: Determination at trace level with an automatic headspace sampler	
Autores: 	Donval, Jean-pierre; Guyader, Vivien.	
Data: 	2017-01	
Ano: 	2017	
Palavras-chave: 	Gas; Seawater; Headspace method.	
Resumo: 	“Headspace” technique is one of the methods for the onboard measurement of hydrogen (H2) and methane (CH4) in deep seawater. Based on the principle of an automatic headspace commercial sampler, a specific device has been developed to automatically inject gas samples from 300 ml syringes (gas phase in equilibrium with seawater). As valves, micro pump, oven and detector are independent, a gas chromatograph is not necessary allowing a reduction of the weight and dimensions of the analytical system. The different steps from seawater sampling to gas injection are described. Accuracy of the method is checked by a comparison with the “purge and trap” technique. The detection limit is estimated to 0.3 nM for hydrogen and 0.1 nM for methane which is close to the background value in deep seawater. It is also shown that this system can be used to analyze other gases such as Nitrogen (N2), carbon monoxide (CO), carbon dioxide (CO2) and light hydrocarbons.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00354/46523/46287.pdf

DOI:10.1016/j.talanta.2016.10.034

http://archimer.ifremer.fr/doc/00354/46523/	
Editor: 	Elsevier Science Bv	
Formato: 	application/pdf	
Fonte: 	Talanta (0039-9140) (Elsevier Science Bv), 2017-01 , Vol. 162 , P. 408-414	
Fonte: 	2016 Elsevier B.V. All rights reserved.

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