Correction of Ion Source Nonlinearities over a Wide Signal Range in Continuous-Flow Isotope Ratio Mass Spectrometry of Water-Derived Hydrogen

1996 ◽  
Vol 68 (13) ◽  
pp. 2281-2286 ◽  
Author(s):  
Herbert J. Tobias ◽  
J. Thomas Brenna
Keyword(s):  
Mass Spectrometry ◽  
Continuous Flow ◽  
Isotope Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Ion Source

scholarly journals The Use of Stable Isotope Ratio Analysis to Trace European Sea Bass (D. labrax) Originating from Different Farming Systems

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2042
Author(s):  
Francesca Tulli ◽  
José M. Moreno-Rojas ◽  
Concetta Maria Messina ◽  
Angela Trocino ◽  
Gerolamo Xiccato ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Continuous Flow ◽  
Isotope Ratio ◽  
Isotopic Ratio ◽  
Isotope Ratio Mass Spectrometry ◽  
Farming Systems ◽  
Sea Bass ◽  
European Sea Bass ◽  
Δ13c And Δ15n ◽  
Fish Samples

This study aimed to determine whether isotopic ratio mass spectrometry (IRMS) can discriminate farmed European sea bass according to different farming systems and geographic origins. Dicentrarchus labrax of commercial size from three different rearing systems (concrete tank inland, sea cages, and extensive methods in valleys or salt works) were collected at the trading period (autumn–winter). For each farming type, different locations spread over Italy were monitored. Once the fish were harvested, the muscle and feed were sampled. For both muscle and feed, δ13C and δ15N were measured by continuous flow elemental analyzer isotope ratio mass spectrometry (CF-EA-IRMS) with the goal of discriminating samples based on the rearing system. Additional δ2H and δ18O measurements of fish samples were performed by continuous flow total combustion elemental analyzer isotope ratio mass spectrometry (CF-TC/EA-IRMS) to track the geographical origin. The measurements of δ13C and δ15N made it possible to discriminate cultured sea bass from different farming systems (extensive vs. intensive) reared at different geographical sites in Italy. Additional information was obtained from δ18O and δ2H, which enabled the geographical areas of origin of the sea bass farmed extensively and intensively (in cages) to be distinguished.

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