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METHOD FOR ANALYZING STABLE ISOTOPES OF PARTICULATE ORGANIC CARBON (POC) AND NITROGEN IN SEAWATER USING ELEMENTAL ANALYSIS-ISOTOPE RATIO MASS SPECTROMETRY (EA-IRMS)
METHOD FOR ANALYZING STABLE ISOTOPES OF PARTICULATE ORGANIC CARBON (POC) AND NITROGEN IN SEAWATER USING ELEMENTAL ANALYSIS-ISOTOPE RATIO MASS SPECTROMETRY (EA-IRMS)
A method for analyzing stable isotopes of particulate organic carbon (POC) and nitrogen in seawater using elemental analysis-isotope ratio mass spectrometry (EA-IRMS), including: using a glass fiber filter membrane to filter a collected water sample and then filter 100 ml of distilled water; subjecting a resulting membrane sample to acidification; and subjecting an acidified membrane sample to EA-IRMS analysis on a machine, where an oxygen addition time is set to 80 s and a combustion tube temperature is set to 700° C. for an elemental analyzer, and a trap current is set to 300 μA to 400 μA for an isotope ratio mass spectrometer. The method of the present disclosure can reduce a detection cost and improve the data accuracy and work efficiency.
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