Summary
This 2023 analytical chemistry paper describes the development of a sensitive method for determining selenium species in natural seawater using isotope-dilution and programmed temperature vaporisation gas chromatography coupled to inductively coupled plasma mass spectrometry. The technique allows large-volume injection to improve detection sensitivity for trace selenium determination in brackish and marine environments. As suggested by the methodology focus, the work addresses analytical challenges in quantifying selenium speciation in complex aquatic matrices.
UK applicability
The analytical method may support UK and European marine monitoring programmes seeking to characterise selenium bioavailability and speciation in coastal and estuarine waters. Such methods underpin environmental assessment and food safety surveillance relevant to UK seafood production and aquaculture.
Key measures
Selenium speciation; detection limits; accuracy of isotope-dilution method; selenium concentrations in seawater samples
Outcomes reported
The study developed and validated an analytical method for sensitive determination of selenium species in natural seawater using isotope-dilution and large-volume injection coupled with gas chromatography-inductively coupled plasma mass spectrometry (PTV-GC-ICP-MS). The method was applied to measure selenium concentrations and speciation in brackish and marine systems.
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